{"id":2776,"date":"2026-03-30T00:00:00","date_gmt":"2026-03-30T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/sfp-issue-troubleshooting-guide\/"},"modified":"2026-06-22T03:42:17","modified_gmt":"2026-06-22T03:42:17","slug":"sfp-issue-troubleshooting-guide","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-issue-troubleshooting-guide","title":{"rendered":"SFP Issue: Nguy\u00ean nh\u00e2n, c\u00e1ch s\u1eeda v\u00e0 h\u01b0\u1edbng d\u1eabn kh\u1eafc ph\u1ee5c"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"628\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/eb93c43d3ec2458eaefc1fb769d2d0e2.jpg\" alt=\"SFP Issue: Causes, Fixes, and Troubleshooting Guide\" class=\"wp-image-2767\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/eb93c43d3ec2458eaefc1fb769d2d0e2.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/eb93c43d3ec2458eaefc1fb769d2d0e2-300x157.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/eb93c43d3ec2458eaefc1fb769d2d0e2-1024x536.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/eb93c43d3ec2458eaefc1fb769d2d0e2-768x402.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/eb93c43d3ec2458eaefc1fb769d2d0e2-18x9.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c s\u1ef1 c\u1ed1 v\u1ec1 SFP l\u00e0 m\u1ed9t trong nh\u1eefng v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn v\u00e0 g\u00e2y kh\u00f3 ch\u1ecbu nh\u1ea5t trong c\u00e1c m\u00f4i tr\u01b0\u1eddng m\u1ea1ng quang s\u1ee3i v\u00e0 Ethernet. D\u00f9 b\u1ea1n \u0111ang x\u1eed l\u00fd m\u1ed9t <strong>kh\u00f4ng c\u00f3 \u0111\u00e8n b\u00e1o k\u1ebft n\u1ed1i<\/strong>, <strong>k\u1ebft n\u1ed1i ng\u1eaft qu\u00e3ng (dao \u0111\u1ed9ng k\u1ebft n\u1ed1i)<\/strong>, ho\u1eb7c m\u1ed9t <strong>l\u1ed7i kh\u00f4ng ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c b\u1ed9 thu ph\u00e1t<\/strong>, nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 th\u01b0\u1eddng kh\u00f4ng r\u00f5 r\u00e0ng ngay l\u1eadp t\u1ee9c. Trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, v\u1ea5n \u0111\u1ec1 kh\u00f4ng ph\u1ea3i do h\u1ecfng h\u00f3c m\u1ed9t th\u00e0nh ph\u1ea7n duy nh\u1ea5t m\u00e0 do s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 kh\u00f4ng t\u01b0\u01a1ng th\u00edch, nhi\u1ec5m b\u1ea9n s\u1ee3i quang, l\u1eafp \u0111\u1eb7t sai ho\u1eb7c suy hao t\u00edn hi\u1ec7u quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u hi\u1ec7n \u0111\u1ea1i v\u00e0 m\u1ea1ng doanh nghi\u1ec7p, <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">C\u00e1c m\u00f4-\u0111un SFP<\/a> \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c \u0111\u1ea3m b\u1ea3o k\u1ebft n\u1ed1i t\u1ed1c \u0111\u1ed9 cao \u1ed5n \u0111\u1ecbnh. Tuy nhi\u00ean, ngay c\u1ea3 nh\u1eefng s\u1ef1 c\u1ed1 nh\u1ecf nh\u01b0 \u0111\u1ea7u n\u1ed1i s\u1ee3i quang b\u1ecb b\u1ea9n, l\u1ef1a ch\u1ecdn b\u01b0\u1edbc s\u00f3ng sai ho\u1eb7c b\u1ed9 thu ph\u00e1t b\u00ean th\u1ee9 ba kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 c\u0169ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ea5t k\u1ebft n\u1ed1i ho\u00e0n to\u00e0n ho\u1eb7c hi\u1ec7u n\u0103ng kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u01b0\u1edbng d\u1eabn n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf nh\u1eb1m gi\u00fap k\u1ef9 s\u01b0 m\u1ea1ng, qu\u1ea3n tr\u1ecb vi\u00ean CNTT v\u00e0 c\u00e1c \u0111\u1ed9i mua s\u1eafm nhanh ch\u00f3ng x\u00e1c \u0111\u1ecbnh, ch\u1ea9n \u0111o\u00e1n v\u00e0 kh\u1eafc ph\u1ee5c c\u00e1c s\u1ef1 c\u1ed1 SFP ph\u1ed5 bi\u1ebfn. B\u1ea1n s\u1ebd h\u1ecdc c\u00e1ch ph\u00e2n bi\u1ec7t gi\u1eefa h\u1ecfng h\u00f3c ph\u1ea7n c\u1ee9ng v\u00e0 s\u1ef1 c\u1ed1 c\u1ea5u h\u00ecnh, c\u00e1ch x\u00e1c minh <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/how-to-test-sfp-compatibility\/\">SFP c\u1ee7a b\u00ean th\u1ee9 ba<\/a>, v\u00e0 c\u00e1ch ki\u1ec3m tra hi\u1ec7u n\u0103ng quang b\u1eb1ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c t\u1ebf, \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m ch\u1ee9ng trong th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ebfn cu\u1ed1i b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n s\u1ebd c\u00f3 m\u1ed9t khung g\u1ee1 r\u1ed1i r\u00f5 r\u00e0ng gi\u00fap gi\u1ea3m th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng, ng\u0103n thay th\u1ebf ph\u1ea7n c\u1ee9ng kh\u00f4ng c\u1ea7n thi\u1ebft v\u00e0 c\u1ea3i thi\u1ec7n \u0111\u1ed9 tin c\u1eady m\u1ea1ng d\u00e0i h\u1ea1n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd37 C\u00e1c tri\u1ec7u ch\u1ee9ng s\u1ef1 c\u1ed1 SFP ph\u1ed5 bi\u1ebfn v\u00e0 \u00fd ngh\u0129a c\u1ee7a ch\u00fang<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c s\u1ef1 c\u1ed1 SFP th\u01b0\u1eddng bi\u1ec3u hi\u1ec7n qua m\u1ed9t t\u1eadp h\u1ee3p nh\u1ecf c\u00e1c tri\u1ec7u ch\u1ee9ng d\u1ec5 nh\u1eadn bi\u1ebft. Vi\u1ec7c hi\u1ec3u r\u00f5 nh\u1eefng t\u00edn hi\u1ec7u ban \u0111\u1ea7u n\u00e0y l\u00e0 r\u1ea5t quan tr\u1ecdng v\u00ec ph\u1ea7n l\u1edbn c\u00e1c s\u1ef1 c\u1ed1 kh\u00f4ng x\u1ea3y ra ng\u1eabu nhi\u00ean \u2014 ch\u00fang th\u01b0\u1eddng do c\u00e1c v\u1ea5n \u0111\u1ec1 \u1edf t\u1ea7ng v\u1eadt l\u00fd, kh\u00f4ng t\u01b0\u01a1ng th\u00edch ho\u1eb7c suy gi\u1ea3m t\u00edn hi\u1ec7u quang. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 ph\u00e2n t\u00edch chi ti\u1ebft c\u00e1c tri\u1ec7u ch\u1ee9ng li\u00ean quan \u0111\u1ebfn SFP ph\u1ed5 bi\u1ebfn nh\u1ea5t v\u00e0 \u00fd ngh\u0129a th\u1ef1c t\u1ebf c\u1ee7a ch\u00fang trong m\u00f4i tr\u01b0\u1eddng m\u1ea1ng th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/62f98e9096df4c9e8191de38771bd36d.jpg\" alt=\"Common SFP Issue Symptoms and What They Mean:No Link Light\" class=\"wp-image-2768\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/62f98e9096df4c9e8191de38771bd36d.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/62f98e9096df4c9e8191de38771bd36d-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/62f98e9096df4c9e8191de38771bd36d-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/62f98e9096df4c9e8191de38771bd36d-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/62f98e9096df4c9e8191de38771bd36d-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Kh\u00f4ng c\u00f3 \u0111\u00e8n b\u00e1o k\u1ebft n\u1ed1i (K\u1ebft n\u1ed1i b\u1ecb ng\u1eaft \/ C\u1ed5ng kh\u00f4ng b\u1eadt)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 s\u1ef1 c\u1ed1 SFP ph\u1ed5 bi\u1ebfn v\u00e0 \u0111\u00e1ng lo ng\u1ea1i nh\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110i\u1ec1u b\u1ea1n th\u1ea5y:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kh\u00f4ng c\u00f3 ho\u1ea1t \u0111\u1ed9ng LED n\u00e0o tr\u00ean c\u1ed5ng chuy\u1ec3n m\u1ea1ch<\/p><\/li>\n\n\n\n<li><p>Giao di\u1ec7n v\u1eabn \u1edf tr\u1ea1ng th\u00e1i \u201cdown\/down\u201d<\/p><\/li>\n\n\n\n<li><p>SFP c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb tr\u1ea1ng th\u00e1i \u201ckh\u00f4ng t\u1ed3n t\u1ea1i\u201d ho\u1eb7c \u201ckh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3\u201d<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u00dd ngh\u0129a th\u00f4ng th\u01b0\u1eddng:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>The <a href=\"https:\/\/www.l-p.com\/products\/478227.htm\" target=\"_self\">SFP<\/a> kh\u00f4ng \u0111\u01b0\u1ee3c g\u1eafn \u0111\u00fang c\u00e1ch v\u00e0o khe c\u1eafm<\/p><\/li>\n\n\n\n<li><p>M\u00f4-\u0111un kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi thi\u1ebft b\u1ecb<\/p><\/li>\n\n\n\n<li><p>C\u00e1p n\u1ed1i s\u1ee3i quang ch\u01b0a \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i ho\u1eb7c b\u1ecb l\u1ed7i<\/p><\/li>\n\n\n\n<li><p>Lo\u1ea1i s\u1ee3i quang kh\u00f4ng \u0111\u00fang (<a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/smf-optical-transceiver-vs-mmf-optical-transceiver-guide\/\" target=\"_blank\" rel=\"\">SMF so v\u1edbi MMF<\/a> kh\u00f4ng kh\u1edbp)<\/p><\/li>\n\n\n\n<li><p>H\u1ecfng ph\u1ea7n c\u1ee9ng \u1edf SFP ho\u1eb7c c\u1ed5ng chuy\u1ec3n m\u1ea1ch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t:<br><\/strong><br>N\u1ebfu chuy\u1ec3n m\u1ea1ch kh\u00f4ng ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c SFP, nguy\u00ean nh\u00e2n nhi\u1ec1u kh\u1ea3 n\u0103ng li\u00ean quan \u0111\u1ebfn vi\u1ec7c nh\u1eadn di\u1ec7n ph\u1ea7n c\u1ee9ng ho\u1eb7c t\u00ednh t\u01b0\u01a1ng th\u00edch, ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u00f4ng su\u1ea5t quang.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">K\u1ebft n\u1ed1i ch\u1eadp ch\u1eddn (k\u1ebft n\u1ed1i l\u00ean\/xu\u1ed1ng ng\u1eaft qu\u00e3ng)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110i\u1ec1u b\u1ea1n th\u1ea5y:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Giao di\u1ec7n li\u00ean t\u1ee5c chuy\u1ec3n tr\u1ea1ng th\u00e1i l\u00ean\/xu\u1ed1ng<\/p><\/li>\n\n\n\n<li><p>K\u1ebft n\u1ed1i kh\u00f4ng \u1ed5n \u0111\u1ecbnh cho ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c d\u1ecbch v\u1ee5<\/p><\/li>\n\n\n\n<li><p>M\u1ea5t g\u00f3i trong c\u00e1c phi\u00ean ho\u1ea1t \u0111\u1ed9ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u00dd ngh\u0129a th\u00f4ng th\u01b0\u1eddng:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u00edn hi\u1ec7u quang y\u1ebfu ho\u1eb7c kh\u00f4ng \u1ed5n \u0111\u1ecbnh (c\u00f4ng su\u1ea5t Rx th\u1ea5p)<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ea7u n\u1ed1i s\u1ee3i quang b\u1ecb b\u1ea9n ho\u1eb7c nhi\u1ec5m b\u1ea9n<\/p><\/li>\n\n\n\n<li><p>C\u00e1p s\u1ee3i quang b\u1ecb cong nh\u1eb9 ho\u1eb7c h\u01b0 h\u1ea1i<\/p><\/li>\n\n\n\n<li><p>SFP l\u1eafp l\u1ecfng ho\u1eb7c ti\u1ebfp x\u00fac c\u1ed5ng kh\u00f4ng \u1ed5n \u0111\u1ecbnh<\/p><\/li>\n\n\n\n<li><p>T\u01b0\u01a1ng th\u00edch g\u1ea7n \u0111\u1ee7 gi\u1eefa b\u1ed9 thu ph\u00e1t v\u00e0 chuy\u1ec3n m\u1ea1ch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t:<br><\/strong><br>Dao \u0111\u1ed9ng k\u1ebft n\u1ed1i th\u01b0\u1eddng l\u00e0 d\u1ea5u hi\u1ec7u c\u1ee7a v\u1ea5n \u0111\u1ec1 v\u1ec1 \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u, ch\u1ee9 kh\u00f4ng ph\u1ea3i h\u1ecfng ho\u00e0n to\u00e0n. Nh\u1eefng t\u1ed5n th\u1ea5t nh\u1ecf trong ng\u00e2n s\u00e1ch quang c\u00f3 th\u1ec3 g\u00e2y m\u1ea5t \u1ed5n \u0111\u1ecbnh ngay c\u1ea3 khi k\u1ebft n\u1ed1i v\u1eabn \u201cho\u1ea1t \u0111\u1ed9ng ph\u1ea7n l\u1edbn\u201d.\u201d<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Kh\u00f4ng ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c SFP ho\u1eb7c l\u1ed7i \u201cB\u1ed9 thu ph\u00e1t kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3\u201d<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110i\u1ec1u b\u1ea1n th\u1ea5y:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u201cB\u1ed9 thu ph\u00e1t kh\u00f4ng \u0111\u01b0\u1ee3c nh\u1eadn d\u1ea1ng\u201d<\/p><\/li>\n\n\n\n<li><p>\u201cC\u1ea3nh b\u00e1o \u201dM\u00f4-\u0111un kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3\u201d<\/p><\/li>\n\n\n\n<li><p>C\u1ed5ng b\u1ecb v\u00f4 hi\u1ec7u h\u00f3a ho\u1eb7c \u1edf tr\u1ea1ng th\u00e1i l\u1ed7i v\u00f4 hi\u1ec7u h\u00f3a<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u00dd ngh\u0129a th\u00f4ng th\u01b0\u1eddng:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Gi\u1edbi h\u1ea1n theo nh\u00e0 s\u1ea3n xu\u1ea5t ho\u1eb7c danh s\u00e1ch tr\u1eafng (th\u01b0\u1eddng g\u1eb7p \u1edf chuy\u1ec3n m\u1ea1ch doanh nghi\u1ec7p)<\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/www.l-p.com\/products\/488474.htm\" target=\"_self\">Module SFP b\u00ean th\u1ee9 ba<\/a> kh\u00f4ng \u0111\u01b0\u1ee3c thi\u1ebft b\u1ecb ch\u1ea5p nh\u1eadn<\/p><\/li>\n\n\n\n<li><p>Kh\u00f4ng kh\u1edbp firmware ho\u1eb7c IOS<\/p><\/li>\n\n\n\n<li><p>Lo\u1ea1i SFP kh\u00f4ng t\u01b0\u01a1ng th\u00edch (<a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/products\/sfp-data-rate-1g-10g-25g-guide\/\" target=\"_blank\" rel=\"\">t\u1ed1c \u0111\u1ed9<\/a>, <a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-form-factor-compatibility-standards-guide\/\" target=\"_blank\" rel=\"\">y\u1ebfu t\u1ed1 h\u00ecnh d\u1ea1ng<\/a>, ho\u1eb7c kh\u00f4ng kh\u1edbp giao th\u1ee9c)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t:<br> <\/strong>\u0110\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 v\u1ea5n \u0111\u1ec1 v\u1ec1 s\u1ee3i quang \u2014 g\u1ea7n nh\u01b0 lu\u00f4n l\u00e0 v\u1ea5n \u0111\u1ec1 v\u1ec1 t\u00ednh t\u01b0\u01a1ng th\u00edch ho\u1eb7c x\u00e1c th\u1ef1c t\u1eeb nh\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00f4ng su\u1ea5t quang th\u1ea5p (C\u00f4ng su\u1ea5t Tx\/Rx ngo\u00e0i ph\u1ea1m vi cho ph\u00e9p)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110i\u1ec1u b\u1ea1n th\u1ea5y (qua ch\u1ea9n \u0111o\u00e1n\/Giao di\u1ec7n d\u00f2ng l\u1ec7nh):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t Rx d\u01b0\u1edbi ng\u01b0\u1ee1ng<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t Tx b\u1ea5t th\u01b0\u1eddng ho\u1eb7c b\u1eb1ng kh\u00f4ng<\/p><\/li>\n\n\n\n<li><p>C\u1ea3nh b\u00e1o c\u1ea3nh b\u00e1o quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u00dd ngh\u0129a th\u00f4ng th\u01b0\u1eddng:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u1ea9n <a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/pc-vs-upc-vs-apc-fiber-connector-comparison-guide\/\" target=\"_blank\" rel=\"\">c\u00e1p quang<\/a> g\u00e2y m\u1ea5t t\u00edn hi\u1ec7u<\/p><\/li>\n\n\n\n<li><p>Kho\u1ea3ng c\u00e1ch c\u00e1p qu\u00e1 d\u00e0i ho\u1eb7c suy hao cao<\/p><\/li>\n\n\n\n<li><p>C\u00e1p s\u1ee3i quang ho\u1eb7c b\u1ea3ng \u0111\u1ea5u n\u1ed1i b\u1ecb h\u01b0 h\u1ea1i<\/p><\/li>\n\n\n\n<li><p>C\u1ef1c t\u00ednh s\u1ee3i quang kh\u00f4ng \u0111\u00fang (Tx\/Rx b\u1ecb ho\u00e1n \u0111\u1ed5i)<\/p><\/li>\n\n\n\n<li><p>B\u1ed9 ph\u00e1t laser SFP b\u1ecb suy gi\u1ea3m<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t:<br><\/strong><br>C\u00f4ng su\u1ea5t quang th\u1ea5p l\u00e0 m\u1ed9t trong nh\u1eefng s\u1ef1 c\u1ed1 SFP d\u1ec5 ch\u1ea9n \u0111o\u00e1n nh\u1ea5t v\u00ec n\u00f3 ph\u1ea3n \u00e1nh tr\u1ef1c ti\u1ebfp ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u \u1edf t\u1ea7ng v\u1eadt l\u00fd.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u1ef7 l\u1ec7 l\u1ed7i cao ho\u1eb7c m\u1ea5t g\u00f3i (m\u00e0 kh\u00f4ng l\u00e0m ng\u1eaft k\u1ebft n\u1ed1i)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110i\u1ec1u b\u1ea1n th\u1ea5y:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>L\u1ed7i CRC t\u0103ng d\u1ea7n<\/p><\/li>\n\n\n\n<li><p>Vi\u1ec7c truy\u1ec1n l\u1ea1i g\u00f3i tin<\/p><\/li>\n\n\n\n<li><p>Th\u00f4ng l\u01b0\u1ee3ng ch\u1eadm ho\u1eb7c kh\u00f4ng \u1ed5n \u0111\u1ecbnh<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u00dd ngh\u0129a th\u00f4ng th\u01b0\u1eddng:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u00edn hi\u1ec7u quang \u1edf m\u1ee9c gi\u1edbi h\u1ea1n (c\u00f4ng su\u1ea5t Rx \u1edf ng\u01b0\u1ee1ng)<\/p><\/li>\n\n\n\n<li><p>Nhi\u1ec5u \u0111i\u1ec7n t\u1eeb trong c\u00e1c SFP d\u1ef1a tr\u00ean \u0111\u1ed3ng (<a href=\"https:\/\/www.l-p.com\/products\/476770.htm\" target=\"_self\">m\u00f4-\u0111un RJ45<\/a>)<\/p><\/li>\n\n\n\n<li><p>C\u00e1p s\u1ee3i quang k\u00e9m ch\u1ea5t l\u01b0\u1ee3ng ho\u1eb7c \u0111\u00e3 c\u0169<\/p><\/li>\n\n\n\n<li><p>Nhi\u1ec5m b\u1ea9n \u0111\u1ea7u n\u1ed1i ng\u1eaft qu\u00e3ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t:<br> <\/strong>Kh\u00e1c v\u1edbi t\u00ecnh tr\u1ea1ng ng\u1eaft k\u1ebft n\u1ed1i, \u0111i\u1ec1u n\u00e0y cho th\u1ea5y k\u1ebft n\u1ed1i v\u1eabn \u201cs\u1ed1ng nh\u01b0ng kh\u00f4ng kh\u1ecfe\u201d, th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn suy gi\u1ea3m hi\u1ec7u n\u0103ng tr\u01b0\u1edbc khi h\u1ecfng ho\u00e0n to\u00e0n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u00f3m t\u1eaft di\u1ec5n gi\u1ea3i nhanh<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>Tri\u1ec7u ch\u1ee9ng<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Nguy\u00ean nh\u00e2n c\u00f3 kh\u1ea3 n\u0103ng nh\u1ea5t<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>M\u1ee9c \u0111\u1ed9 nghi\u00eam tr\u1ecdng<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Kh\u00f4ng c\u00f3 \u0111\u00e8n b\u00e1o li\u00ean k\u1ebft<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u00ednh t\u01b0\u01a1ng th\u00edch \/ l\u1eafp \u0111\u1eb7t \/ h\u1ecfng ph\u1ea7n c\u1ee9ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cao<br><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Nh\u1ea5p nh\u00e1y li\u00ean k\u1ebft<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>S\u1ee3i quang b\u1ea9n \/ t\u00edn hi\u1ec7u y\u1ebfu \/ v\u1ea5n \u0111\u1ec1 c\u00e1p<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Trung-b\u00ecnh \u0111\u1ebfn Cao<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Kh\u00f4ng ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c \/ kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Gi\u1edbi h\u1ea1n theo nh\u00e0 s\u1ea3n xu\u1ea5t ho\u1eb7c kh\u00f4ng kh\u1edbp<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cao<br><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>C\u00f4ng su\u1ea5t quang th\u1ea5p<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed5n th\u1ea5t s\u1ee3i quang \/ nhi\u1ec5m b\u1ea9n \/ kho\u1ea3ng c\u00e1ch<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u00f4i tr\u01b0\u1eddng truy\u1ec1n d\u1eabn<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>L\u1ed7i g\u00f3i<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u \u1edf m\u1ee9c gi\u1edbi h\u1ea1n<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u00f4i tr\u01b0\u1eddng truy\u1ec1n d\u1eabn<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u1ea7n l\u1edbn c\u00e1c s\u1ef1 c\u1ed1 SFP kh\u00f4ng ph\u1ea3i l\u00e0 h\u1ecfng h\u00f3c ph\u1ea7n c\u1ee9ng ng\u1eabu nhi\u00ean \u2014 ch\u00fang l\u00e0 c\u00e1c v\u1ea5n \u0111\u1ec1 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c \u1edf t\u1ea7ng v\u1eadt l\u00fd ho\u1eb7c t\u00ednh t\u01b0\u01a1ng th\u00edch. B\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c tri\u1ec7u ch\u1ee9ng tr\u01b0\u1edbc ti\u00ean, b\u1ea1n th\u01b0\u1eddng c\u00f3 th\u1ec3 thu h\u1eb9p nguy\u00ean nh\u00e2n g\u1ed1c v\u1ec1 \u0111\u1ed9 s\u1ea1ch c\u1ee7a s\u1ee3i quang, c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u ho\u1eb7c t\u00ednh t\u01b0\u01a1ng th\u00edch c\u1ee7a b\u1ed9 thu ph\u00e1t ch\u1ec9 trong v\u00e0i ph\u00fat, thay v\u00ec thay th\u1ebf ph\u1ea7n c\u1ee9ng m\u1ed9t c\u00e1ch m\u00f9 qu\u00e1ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd37 V\u00ec sao c\u00e1c m\u00f4-\u0111un SFP th\u1ea5t b\u1ea1i: C\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 c\u1ed1 SFP hi\u1ebfm khi do m\u1ed9t y\u1ebfu t\u1ed1 duy nh\u1ea5t g\u00e2y ra. Trong m\u00f4i tr\u01b0\u1eddng doanh nghi\u1ec7p v\u00e0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-a-data-center\/\">trung t\u00e2m d\u1eef li\u1ec7u<\/a> th\u1ef1c t\u1ebf, ph\u1ea7n l\u1edbn c\u00e1c \u201cs\u1ef1 c\u1ed1 SFP\u201d l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1eadt l\u00fd \u1edf t\u1ea7ng 1, s\u1ef1 kh\u00f4ng t\u01b0\u01a1ng th\u00edch ho\u1eb7c c\u0103ng th\u1eb3ng m\u00f4i tr\u01b0\u1eddng theo th\u1eddi gian. Vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c nguy\u00ean nh\u00e2n g\u1ed1c n\u00e0y l\u00e0 thi\u1ebft y\u1ebfu \u0111\u1ec3 gi\u1ea3m th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng v\u00e0 tr\u00e1nh vi\u1ec7c thay th\u1ebf m\u00f4-\u0111un kh\u00f4ng c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/021e086491754de58f09e39d947e7d53.jpg\" alt=\"Why SFP Modules Fail: The Most Common Causes\" class=\"wp-image-2769\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/021e086491754de58f09e39d947e7d53.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/021e086491754de58f09e39d947e7d53-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/021e086491754de58f09e39d947e7d53-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/021e086491754de58f09e39d947e7d53-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/021e086491754de58f09e39d947e7d53-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110\u1ea7u n\u1ed1i s\u1ee3i quang b\u1ea9n ho\u1eb7c b\u1ecb nhi\u1ec5m b\u1ea9n (Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n h\u00e0ng \u0111\u1ea7u g\u00e2y ra s\u1ef1 c\u1ed1 SFP l\u00e0 nhi\u1ec5m b\u1ea9n tr\u00ean m\u1eb7t cu\u1ed1i s\u1ee3i quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do g\u00e2y h\u1ecfng:<\/strong><br>Ngay c\u1ea3 c\u00e1c h\u1ea1t b\u1ee5i vi m\u00f4 c\u0169ng c\u00f3 th\u1ec3 ch\u1eb7n ho\u1eb7c l\u00e0m t\u00e1n x\u1ea1 tia laser, l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u quang v\u00e0 g\u00e2y m\u1ea5t \u1ed5n \u0111\u1ecbnh k\u1ebft n\u1ed1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c tri\u1ec7u ch\u1ee9ng \u0111i\u1ec3n h\u00ecnh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Nh\u1ea5p nh\u00e1y li\u00ean k\u1ebft<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t quang nh\u1eadn (Rx) th\u1ea5p<\/p><\/li>\n\n\n\n<li><p>K\u1ebft n\u1ed1i ng\u1eaft qu\u00e3ng<\/p><\/li>\n\n\n\n<li><p>M\u1ea5t ho\u00e0n to\u00e0n k\u1ebft n\u1ed1i sau khi c\u1eafm l\u1ea1i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>N\u01a1i x\u1ea3y ra nhi\u1ec5m b\u1ea9n:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/fiber-patch-cords-networking-uses\/\" target=\"_blank\" rel=\"\">D\u00e2y c\u00e1p n\u1ed1i s\u1ee3i quang<\/a> Ti\u1ebfp x\u00fac v\u1edbi kh\u00f4ng kh\u00ed<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ea7u n\u1ed1i kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1eady n\u1eafp trong qu\u00e1 tr\u00ecnh <a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/5-steps-transceiver-installation-success\/\" target=\"_blank\" rel=\"\">quy tr\u00ecnh l\u1eafp \u0111\u1eb7t<\/a><\/p><\/li>\n\n\n\n<li><p>B\u1ee5i b\u00ean trong c\u1ed5ng SFP c\u1ee7a switch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t:<br><\/strong><br>Ph\u1ea7n l\u1edbn c\u00e1c SFP \u201ch\u1ecfng\u201d th\u1ef1c t\u1ebf l\u00e0 do <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/how-to-clean-sfp-module\/\">v\u1ea5n \u0111\u1ec1 v\u1ec7 sinh<\/a>, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u1ed7i ph\u1ea7n c\u1ee9ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Kh\u00f4ng t\u01b0\u01a1ng th\u00edch (T\u1ed1c \u0111\u1ed9, b\u01b0\u1edbc s\u00f3ng ho\u1eb7c gi\u1edbi h\u1ea1n nh\u00e0 cung c\u1ea5p)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch r\u1ea5t ph\u1ed5 bi\u1ebfn trong c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb nhi\u1ec1u nh\u00e0 cung c\u1ea5p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do g\u00e2y h\u1ecfng:<\/strong><br>C\u00e1c module SFP ph\u1ea3i ph\u00f9 h\u1ee3p v\u1ec1:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed1c \u0111\u1ed9 (1G, 10G, 25G, v.v.)<\/p><\/li>\n\n\n\n<li><p>B\u01b0\u1edbc s\u00f3ng (850nm, 1310nm, v.v.)<\/p><\/li>\n\n\n\n<li><p>Lo\u1ea1i s\u1ee3i quang (\u0111\u01a1n mode so v\u1edbi \u0111a mode)<\/p><\/li>\n\n\n\n<li><p>Quy t\u1eafc t\u01b0\u01a1ng th\u00edch nh\u00e0 cung c\u1ea5p (gi\u1edbi h\u1ea1n c\u1ee7a Cisco\/HP\/Arista)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c tri\u1ec7u ch\u1ee9ng \u0111i\u1ec3n h\u00ecnh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u201cL\u1ed7i \u201db\u1ed9 thu ph\u00e1t kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3\u201d<\/p><\/li>\n\n\n\n<li><p>C\u1ed5ng b\u1ecb v\u00f4 hi\u1ec7u h\u00f3a ho\u1eb7c \u1edf tr\u1ea1ng th\u00e1i l\u1ed7i v\u00f4 hi\u1ec7u h\u00f3a<\/p><\/li>\n\n\n\n<li><p>Kh\u00f4ng c\u00f3 \u0111\u00e8n b\u00e1o k\u1ebft n\u1ed1i d\u00f9 c\u00e1p \u0111\u01b0\u1ee3c \u0111\u1ea5u \u0111\u00fang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t:<br> <\/strong>Ngay c\u1ea3 m\u1ed9t b\u1ed9 thu ph\u00e1t SFP v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt l\u00e0 \u0111\u00fang c\u0169ng c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i n\u1ebfu n\u00f3 kh\u00f4ng \u0111\u01b0\u1ee3c firmware switch ph\u00ea duy\u1ec7t ho\u1eb7c nh\u1eadn di\u1ec7n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">S\u1eed d\u1ee5ng sai lo\u1ea1i s\u1ee3i quang ho\u1eb7c kh\u00f4ng kh\u1edbp b\u01b0\u1edbc s\u00f3ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t sai l\u1ea7m tri\u1ec3n khai r\u1ea5t ph\u1ed5 bi\u1ebfn l\u00e0 tr\u1ed9n l\u1eabn c\u00e1c lo\u1ea1i s\u1ee3i quang ho\u1eb7c b\u1ed9 thu ph\u00e1t quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do g\u00e2y h\u1ecfng:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a href=\"https:\/\/www.l-p.com\/products\/476046.htm\" target=\"_self\">B\u1ed9 thu ph\u00e1t \u0111\u01a1n mode (Single-mode SFP)<\/a> \u0111\u01b0\u1ee3c d\u00f9ng tr\u00ean s\u1ee3i quang \u0111a mode (ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i)<\/p><\/li>\n\n\n\n<li><p>C\u1eb7p b\u01b0\u1edbc s\u00f3ng kh\u00f4ng kh\u1edbp (v\u00ed d\u1ee5: c\u1eb7p 1310nm v\u00e0 1550nm kh\u00f4ng t\u01b0\u01a1ng th\u00edch)<\/p><\/li>\n\n\n\n<li><p>Gh\u00e9p sai b\u1ed9 thu ph\u00e1t \u1edf hai \u0111\u1ea7u<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c tri\u1ec7u ch\u1ee9ng \u0111i\u1ec3n h\u00ecnh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>K\u1ebft n\u1ed1i y\u1ebfu ho\u1eb7c kh\u00f4ng c\u00f3 k\u1ebft n\u1ed1i<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t quang c\u1ef1c th\u1ea5p<\/p><\/li>\n\n\n\n<li><p>Truy\u1ec1n th\u00f4ng kh\u00f4ng \u1ed5n \u0111\u1ecbnh ho\u1eb7c ch\u1ec9 m\u1ed9t chi\u1ec1u<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t:<br><\/strong><br>Sai l\u1ec7ch s\u1ee3i quang th\u01b0\u1eddng t\u1ea1o ra k\u1ebft n\u1ed1i m\u1ed9t ph\u1ea7n ho\u1eb7c kh\u00f4ng \u1ed5n \u0111\u1ecbnh thay v\u00ec m\u1ea5t ho\u00e0n to\u00e0n, khi\u1ebfn vi\u1ec7c ph\u00e1t hi\u1ec7n tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">H\u01b0 h\u1ecfng v\u1eadt l\u00fd tr\u00ean s\u1ee3i quang ho\u1eb7c \u0111\u1ea7u n\u1ed1i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1p quang r\u1ea5t nh\u1ea1y c\u1ea3m v\u1edbi \u1ee9ng su\u1ea5t c\u01a1 h\u1ecdc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do g\u00e2y h\u1ecfng:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ee3i quang b\u1ecb cong v\u01b0\u1ee3t qu\u00e1 b\u00e1n k\u00ednh u\u1ed1n cho ph\u00e9p<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ea7u n\u1ed1i n\u1ee9t ho\u1eb7c ferrule l\u1ec7ch t\u00e2m<\/p><\/li>\n\n\n\n<li><p>B\u1ea3ng \u0111\u1ea5u n\u1ed1i (patch panel) ho\u1eb7c b\u1ed9 gh\u00e9p (coupler) b\u1ecb h\u01b0 h\u1ea1i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c tri\u1ec7u ch\u1ee9ng \u0111i\u1ec3n h\u00ecnh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ea5t k\u1ebft n\u1ed1i \u0111\u1ed9t ng\u1ed9t sau khi di chuy\u1ec3n<\/p><\/li>\n\n\n\n<li><p>K\u1ebft n\u1ed1i ch\u1eadp ch\u1eddn khi ch\u1ea1m v\u00e0o c\u00e1p<\/p><\/li>\n\n\n\n<li><p>S\u1ed1 l\u1ed7i bit t\u0103ng d\u1ea7n theo th\u1eddi gian<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t:<br> <\/strong>H\u01b0 h\u1ecfng s\u1ee3i quang th\u01b0\u1eddng mang t\u00ednh c\u01a1 h\u1ecdc v\u00e0 ti\u1ebfn tri\u1ec3n, kh\u00f4ng x\u1ea3y ra ngay l\u1eadp t\u1ee9c.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">L\u1eafp \u0111\u1eb7t SFP kh\u00f4ng \u0111\u00fang c\u00e1ch ho\u1eb7c l\u1ecfng l\u1ebbo<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 m\u1ed9t module SFP ho\u1ea1t \u0111\u1ed9ng ho\u00e0n h\u1ea3o c\u0169ng c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t \u0111\u00fang c\u00e1ch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do g\u00e2y h\u1ecfng:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Module ch\u01b0a \u0111\u01b0\u1ee3c \u0111\u1ea9y ho\u00e0n to\u00e0n v\u00e0o khe c\u1eafm<\/p><\/li>\n\n\n\n<li><p>Kh\u00f3a b\u1eadt (latching) ch\u01b0a \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh<\/p><\/li>\n\n\n\n<li><p>Chuy\u1ec3n \u0111\u1ed9ng nh\u1eb9 g\u00e2y ra ti\u1ebfp x\u00fac ng\u1eaft qu\u00e3ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c tri\u1ec7u ch\u1ee9ng \u0111i\u1ec3n h\u00ecnh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c s\u1ef1 ki\u1ec7n k\u1ebft n\u1ed1i\/ng\u1eaft k\u1ebft n\u1ed1i ng\u1eabu nhi\u00ean<\/p><\/li>\n\n\n\n<li><p>M\u00f4-\u0111un SFP kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n ng\u1eaft qu\u00e3ng<\/p><\/li>\n\n\n\n<li><p>Ho\u1ea1t \u0111\u1ed9ng tr\u1edf l\u1ea1i t\u1ea1m th\u1eddi sau khi c\u1eafm l\u1ea1i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t:<br> <\/strong>\u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n \u0111\u01a1n gi\u1ea3n nh\u1ea5t nh\u01b0ng th\u01b0\u1eddng b\u1ecb b\u1ecf qua nh\u1ea5t c\u1ee7a c\u00e1c s\u1ef1 c\u1ed1 SFP.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V\u01b0\u1ee3t qu\u00e1 ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed7i k\u1ebft n\u1ed1i s\u1ee3i quang \u0111\u1ec1u c\u00f3 ng\u01b0\u1ee1ng t\u1ed5n hao t\u1ed1i \u0111a.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do g\u00e2y h\u1ecfng:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Chi\u1ec1u d\u00e0i c\u00e1p v\u01b0\u1ee3t qu\u00e1 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt<\/p><\/li>\n\n\n\n<li><p>Qu\u00e1 nhi\u1ec1u b\u1ea3ng \u0111\u1ea5u n\u1ed1i ho\u1eb7c \u0111\u1ea7u n\u1ed1i tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ed9 suy hao t\u00edn hi\u1ec7u v\u01b0\u1ee3t qu\u00e1 kh\u1ea3 n\u0103ng c\u00f4ng su\u1ea5t ph\u00e1t (Tx) c\u1ee7a SFP<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c tri\u1ec7u ch\u1ee9ng \u0111i\u1ec3n h\u00ecnh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u1ea3nh b\u00e1o c\u00f4ng su\u1ea5t nh\u1eadn (Rx) th\u1ea5p<\/p><\/li>\n\n\n\n<li><p>K\u1ebft n\u1ed1i kh\u00f4ng \u1ed5n \u0111\u1ecbnh theo kho\u1ea3ng c\u00e1ch<\/p><\/li>\n\n\n\n<li><p>S\u1ef1 c\u1ed1 ch\u1ec9 x\u1ea3y ra v\u1edbi c\u00e1c \u0111o\u1ea1n c\u00e1p d\u00e0i h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t:<br> <\/strong>Ngay c\u1ea3 c\u00e1c m\u00f4-\u0111un SFP ch\u1ea5t l\u01b0\u1ee3ng cao c\u0169ng kh\u00f4ng th\u1ec3 b\u00f9 \u0111\u1eafp cho m\u1ee9c suy hao quang qu\u00e1 m\u1ee9c tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ph\u1ea7n c\u1ee9ng SFP gi\u00e0 c\u1ed7i ho\u1eb7c l\u1ed7i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 \u00edt ph\u1ed5 bi\u1ebfn h\u01a1n c\u00e1c v\u1ea5n \u0111\u1ec1 m\u00f4i tr\u01b0\u1eddng, <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26155-1g-sfp.htm\">B\u1ed9 thu ph\u00e1t SFP<\/a> c\u00f3 th\u1ec3 h\u1ecfng theo th\u1eddi gian.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do g\u00e2y h\u1ecfng:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Suy gi\u1ea3m laser (gi\u1ea3m c\u00f4ng su\u1ea5t ph\u00e1t \u2013 Tx)<\/p><\/li>\n\n\n\n<li><p>H\u01b0 h\u1ecfng m\u1ea1ch b\u00ean trong<\/p><\/li>\n\n\n\n<li><p>\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 cao tr\u00ean c\u00e1c switch m\u1eadt \u0111\u1ed9 cao<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c tri\u1ec7u ch\u1ee9ng \u0111i\u1ec3n h\u00ecnh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Suy gi\u1ea3m hi\u1ec7u n\u0103ng d\u1ea7n d\u1ea7n<\/p><\/li>\n\n\n\n<li><p>C\u1ea3nh b\u00e1o quang t\u0103ng d\u1ea7n<\/p><\/li>\n\n\n\n<li><p>S\u1ef1 c\u1ed1 x\u1ea3y ra tr\u00ean nhi\u1ec1u c\u00e1p kh\u00e1c nhau (c\u00f9ng m\u1ed9t m\u00f4-\u0111un SFP)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t:<br><\/strong><br>N\u1ebfu nhi\u1ec1u c\u00e1p \u0111\u00e3 bi\u1ebft l\u00e0 t\u1ed1t \u0111\u1ec1u g\u1eb7p s\u1ef1 c\u1ed1 tr\u00ean c\u00f9ng m\u1ed9t m\u00f4-\u0111un, th\u00ec m\u00f4-\u0111un SFP \u0111\u00f3 c\u00f3 kh\u1ea3 n\u0103ng b\u1ecb l\u1ed7i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u1ea7n l\u1edbn c\u00e1c s\u1ef1 c\u1ed1 SFP r\u01a1i v\u00e0o n\u0103m nh\u00f3m nguy\u00ean nh\u00e2n ch\u1ee7 \u0111\u1ea1o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Nhi\u1ec5m b\u1ea9n (\u0111\u1ed9 s\u1ea1ch c\u1ee7a s\u1ee3i quang)<\/p><\/li>\n\n\n\n<li><p>Kh\u00f4ng t\u01b0\u01a1ng th\u00edch (nh\u00e0 s\u1ea3n xu\u1ea5t\/t\u1ed1c \u0111\u1ed9\/b\u01b0\u1edbc s\u00f3ng)<\/p><\/li>\n\n\n\n<li><p>H\u01b0 h\u1ecfng v\u1eadt l\u00fd s\u1ee3i quang<\/p><\/li>\n\n\n\n<li><p>V\u1ea5n \u0111\u1ec1 l\u1eafp \u0111\u1eb7t<\/p><\/li>\n\n\n\n<li><p>V\u01b0\u1ee3t qu\u00e1 ng\u00e2n s\u00e1ch quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ec9 m\u1ed9t ph\u1ea7n nh\u1ecf c\u00e1c tr\u01b0\u1eddng h\u1ee3p l\u00e0 do l\u1ed7i ph\u1ea7n c\u1ee9ng th\u1ef1c t\u1ebf c\u1ee7a ch\u00ednh m\u00f4-\u0111un SFP. V\u00ec v\u1eady, vi\u1ec7c ch\u1ea9n \u0111o\u00e1n h\u1ec7 th\u1ed1ng l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu tr\u01b0\u1edbc khi thay th\u1ebf.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd37 C\u00e1ch kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 SFP t\u1eebng b\u01b0\u1edbc<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec7u qu\u1ea3 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-troubleshooting-quick-checklist\/\">Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 SFP<\/a> tu\u00e2n theo ph\u01b0\u01a1ng ph\u00e1p ch\u1ea9n \u0111o\u00e1n ph\u00e2n l\u1edbp, b\u1eaft \u0111\u1ea7u t\u1eeb c\u00e1c ki\u1ec3m tra v\u1eadt l\u00fd \u0111\u01a1n gi\u1ea3n nh\u1ea5t r\u1ed3i ti\u1ebfn d\u1ea7n \u0111\u1ebfn x\u00e1c minh s\u00e2u h\u01a1n v\u1ec1 m\u1eb7t quang h\u1ecdc v\u00e0 c\u1ea5u h\u00ecnh. \u0110i\u1ec1u n\u00e0y ng\u0103n ng\u1eeba vi\u1ec7c thay th\u1ebf m\u00f4-\u0111un kh\u00f4ng c\u1ea7n thi\u1ebft v\u00e0 nhanh ch\u00f3ng x\u00e1c \u0111\u1ecbnh xem s\u1ef1 c\u1ed1 li\u00ean quan \u0111\u1ebfn s\u1ee3i quang, ph\u1ea7n c\u1ee9ng SFP, c\u1ea5u h\u00ecnh switch hay t\u00ednh t\u01b0\u01a1ng th\u00edch.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8545edc9469140ba88c9bd72e507a504.jpg\" alt=\"How to Troubleshoot SFP Issues Step by Step\" class=\"wp-image-2770\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8545edc9469140ba88c9bd72e507a504.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8545edc9469140ba88c9bd72e507a504-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8545edc9469140ba88c9bd72e507a504-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8545edc9469140ba88c9bd72e507a504-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8545edc9469140ba88c9bd72e507a504-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 quy tr\u00ecnh l\u00e0m vi\u1ec7c th\u1ef1c t\u1ebf, \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m ch\u1ee9ng trong th\u1ef1c t\u1ebf, \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong c\u00e1c m\u00f4i tr\u01b0\u1eddng doanh nghi\u1ec7p v\u00e0 trung t\u00e2m d\u1eef li\u1ec7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 1 \u2014 Ki\u1ec3m tra thi\u1ebft l\u1eadp v\u1eadt l\u00fd c\u01a1 b\u1ea3n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1c ki\u1ec3m tra \u0111\u01a1n gi\u1ea3n nh\u1ea5t tr\u01b0\u1edbc khi \u0111i s\u00e2u v\u00e0o ch\u1ea9n \u0111o\u00e1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u1ea7n ki\u1ec3m tra nh\u1eefng g\u00ec:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u00f4-\u0111un SFP \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1eafm \u0111\u1ea7y \u0111\u1ee7 v\u00e0o khe ch\u01b0a?<\/p><\/li>\n\n\n\n<li><p>Kh\u00f3a c\u1ed1 \u0111\u1ecbnh \u0111\u00e3 \u0111\u01b0\u1ee3c kh\u00f3a ch\u1eafc ch\u01b0a?<\/p><\/li>\n\n\n\n<li><p>C\u1ea3 hai \u0111\u1ea7u n\u1ed1i s\u1ee3i quang c\u00f3 \u0111\u01b0\u1ee3c c\u1eafm \u0111\u00fang c\u00e1ch kh\u00f4ng?<\/p><\/li>\n\n\n\n<li><p>TX v\u00e0 RX c\u00f3 \u0111\u01b0\u1ee3c \u0111\u1ea5u ch\u00e9o ch\u00ednh x\u00e1c kh\u00f4ng (TX \u2192 RX, RX \u2192 TX)?<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>M\u1ed9t t\u1ef7 l\u1ec7 \u0111\u00e1ng k\u1ec3 c\u00e1c tr\u01b0\u1eddng h\u1ee3p \u201ch\u1ecfng SFP\u201d th\u1ef1c t\u1ebf l\u00e0 do l\u1ed7i l\u1eafp \u0111\u1eb7t ho\u1eb7c c\u00e1p, ch\u1ee9 kh\u00f4ng ph\u1ea3i do s\u1ef1 c\u1ed1 ph\u1ea7n c\u1ee9ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Di\u1ec5n gi\u1ea3i nhanh k\u1ebft qu\u1ea3:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>N\u1ebfu li\u00ean k\u1ebft ho\u1ea1t \u0111\u1ed9ng l\u1ea1i sau khi c\u1eafm l\u1ea1i \u2192 v\u1ea5n \u0111\u1ec1 l\u1eafp \u0111\u1eb7t<\/p><\/li>\n\n\n\n<li><p>N\u1ebfu kh\u00f4ng c\u00f3 g\u00ec thay \u0111\u1ed5i \u2192 ti\u1ebfp t\u1ee5c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 2 \u2014 Ki\u1ec3m tra v\u00e0 l\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i s\u1ee3i quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec5m b\u1ea9n s\u1ee3i quang l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n g\u1ed1c ph\u1ed5 bi\u1ebfn nh\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u1ea7n l\u00e0m g\u00ec:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ki\u1ec3m tra \u0111\u1ea7u n\u1ed1i b\u1eb1ng k\u00ednh soi s\u1ee3i quang (n\u1ebfu c\u00f3 s\u1eb5n)<\/p><\/li>\n\n\n\n<li><p>L\u00e0m s\u1ea1ch c\u1ea3 hai \u0111\u1ea7u b\u1eb1ng d\u1ee5ng c\u1ee5 l\u00e0m s\u1ea1ch s\u1ee3i quang chuy\u00ean d\u1ee5ng<\/p><\/li>\n\n\n\n<li><p>C\u1eafm l\u1ea1i \u0111\u1ea7u n\u1ed1i sau khi l\u00e0m s\u1ea1ch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u1ea7n l\u01b0u \u00fd nh\u1eefng y\u1ebfu t\u1ed1 sau:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c h\u1ea1t b\u1ee5i<\/p><\/li>\n\n\n\n<li><p>D\u1ea5u v\u1ebft d\u1ea7u do ch\u1ea1m v\u00e0o b\u1eb1ng tay<\/p><\/li>\n\n\n\n<li><p>C\u00e1c v\u1ebft x\u01b0\u1edbc ho\u1eb7c \u0111\u1ea7u n\u1ed1i ferrule b\u1ecb h\u01b0 h\u1ecfng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>Ngay c\u1ea3 nhi\u1ec5m b\u1ea9n \u1edf c\u1ea5p \u0111\u1ed9 vi m\u00f4 c\u0169ng c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u quang v\u00e0 g\u00e2y hi\u1ec7n t\u01b0\u1ee3ng li\u00ean k\u1ebft ch\u1eadp ch\u1eddn ho\u1eb7c m\u1ea5t li\u00ean k\u1ebft ho\u00e0n to\u00e0n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 3 \u2014 Ki\u1ec3m tra vi\u1ec7c ph\u00e1t hi\u1ec7n v\u00e0 tr\u1ea1ng th\u00e1i SFP tr\u00ean switch<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1eed d\u1ee5ng giao di\u1ec7n d\u00f2ng l\u1ec7nh (CLI) ho\u1eb7c giao di\u1ec7n qu\u1ea3n tr\u1ecb \u0111\u1ec3 x\u00e1c nh\u1eadn switch c\u00f3 nh\u1eadn di\u1ec7n \u0111\u01b0\u1ee3c module hay kh\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c ki\u1ec3m tra \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Tr\u1ea1ng th\u00e1i giao di\u1ec7n (up\/down)<\/p><\/li>\n\n\n\n<li><p>Vi\u1ec7c ph\u00e1t hi\u1ec7n b\u1ed9 thu ph\u00e1t (transceiver)<\/p><\/li>\n\n\n\n<li><p>Vi\u1ec7c nh\u1eadn di\u1ec7n nh\u00e0 s\u1ea3n xu\u1ea5t\/m\u00f4 h\u00ecnh<\/p><\/li>\n\n\n\n<li><p>Tr\u1ea1ng th\u00e1i b\u1ecb v\u00f4 hi\u1ec7u h\u00f3a do l\u1ed7i (error-disabled)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>K\u1ebft qu\u1ea3 n\u00e0o cho bi\u1ebft \u0111i\u1ec1u g\u00ec:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u201cKh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n\u201d \u2192 v\u1ea5n \u0111\u1ec1 v\u1ec1 c\u1eafm thi\u1ebft b\u1ecb ho\u1eb7c t\u01b0\u01a1ng th\u00edch<\/p><\/li>\n\n\n\n<li><p>\u201cB\u1ed9 thu ph\u00e1t kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3\u201d \u2192 gi\u1edbi h\u1ea1n theo nh\u00e0 s\u1ea3n xu\u1ea5t ho\u1eb7c kh\u00f4ng kh\u1edbp<\/p><\/li>\n\n\n\n<li><p>\u0110\u01b0\u1ee3c ph\u00e1t hi\u1ec7n nh\u01b0ng tr\u1ea1ng th\u00e1i down \u2192 kh\u1ea3 n\u0103ng cao do v\u1ea5n \u0111\u1ec1 s\u1ee3i quang ho\u1eb7c quang h\u1ecdc<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>B\u01b0\u1edbc n\u00e0y ph\u00e2n bi\u1ec7t r\u00f5 c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 nh\u1eadn di\u1ec7n ph\u1ea7n c\u1ee9ng v\u1edbi c\u00e1c v\u1ea5n \u0111\u1ec1 \u1edf t\u1ea7ng v\u1eadt l\u00fd.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 4 \u2014 X\u00e1c minh t\u00ednh t\u01b0\u01a1ng th\u00edch (t\u1ed1c \u0111\u1ed9, b\u01b0\u1edbc s\u00f3ng, lo\u1ea1i s\u1ee3i quang)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 th\u00e0nh ph\u1ea7n trong li\u00ean k\u1ebft \u0111\u1ec1u ph\u00f9 h\u1ee3p v\u1edbi nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ki\u1ec3m tra c\u00e1c y\u1ebfu t\u1ed1 sau:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed1c \u0111\u1ed9 SFP (1G vs. 10G vs. 25G)<\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-wavelengths-850nm-1310nm-1550nm-guide\/\" target=\"_blank\" rel=\"\">B\u01b0\u1edbc s\u00f3ng<br><\/a> B\u01b0\u1edbc s\u00f3ng kh\u1edbp (v\u00ed d\u1ee5: 850nm vs. 1310nm)<\/p><\/li>\n\n\n\n<li><p>Lo\u1ea1i s\u1ee3i quang (\u0111\u01a1n mode so v\u1edbi \u0111a mode)<\/p><\/li>\n\n\n\n<li><p>Quy t\u1eafc t\u01b0\u01a1ng th\u00edch c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t switch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng <a href=\"https:\/\/www.l-p.com\/store-26192-10g-sfp.htm\" target=\"_self\">SFP+<\/a> trong c\u1ed5ng ch\u1ec9 h\u1ed7 tr\u1ee3 SFP<\/p><\/li>\n\n\n\n<li><p>Tr\u1ed9n l\u1eabn s\u1ee3i \u0111\u01a1n mode (SMF) v\u00e0 \u0111a mode (MMF)<\/p><\/li>\n\n\n\n<li><p>S\u1eed d\u1ee5ng thi\u1ebft b\u1ecb quang h\u1ecdc b\u00ean th\u1ee9 ba kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>C\u00e1c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn m\u1ea5t li\u00ean k\u1ebft ho\u1eb7c l\u1ed7i ph\u00e1t hi\u1ec7n li\u00ean t\u1ee5c, ngay c\u1ea3 khi ph\u1ea7n c\u1ee9ng v\u1eabn t\u1ed1t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 5 \u2014 Ki\u1ec3m tra m\u1ee9c c\u00f4ng su\u1ea5t quang (ch\u1ea9n \u0111o\u00e1n Tx\/Rx)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu SFP \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n nh\u01b0ng li\u00ean k\u1ebft kh\u00f4ng \u1ed5n \u0111\u1ecbnh, h\u00e3y ki\u1ec3m tra hi\u1ec7u n\u0103ng quang h\u1ecdc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u1ea7n theo d\u00f5i nh\u1eefng th\u00f4ng s\u1ed1 sau:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t Rx (c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o)<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t Tx (c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u \u0111\u1ea7u ra)<\/p><\/li>\n\n\n\n<li><p>Nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111i\u1ec7n \u00e1p (n\u1ebfu c\u00f3 s\u1eb5n)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Di\u1ec5n gi\u1ea3i:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t Rx th\u1ea5p \u2192 t\u1ed5n th\u1ea5t s\u1ee3i quang, \u0111\u1ea7u n\u1ed1i b\u1ea9n ho\u1eb7c kho\u1ea3ng c\u00e1ch qu\u00e1 xa<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t Tx b\u1eb1ng kh\u00f4ng \u2192 b\u1ed9 ph\u00e1t SFP b\u1ecb l\u1ed7i<\/p><\/li>\n\n\n\n<li><p>Gi\u00e1 tr\u1ecb ngo\u00e0i ph\u1ea1m vi \u2192 kh\u1ea3 n\u0103ng suy gi\u1ea3m ph\u1ea7n c\u1ee9ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>Ch\u1ea9n \u0111o\u00e1n quang h\u1ecdc cung c\u1ea5p kh\u1ea3 n\u0103ng quan s\u00e1t tr\u1ef1c ti\u1ebfp t\u00ecnh tr\u1ea1ng t\u00edn hi\u1ec7u tr\u00ean to\u00e0n b\u1ed9 \u0111\u01b0\u1eddng d\u1eabn s\u1ee3i quang.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 6 \u2014 Ho\u00e1n \u0111\u1ed5i c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed s\u1ef1 c\u1ed1<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ec3m tra c\u00f4 l\u1eadp l\u00e0 m\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 \u0111\u00e1ng tin c\u1eady nh\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ho\u00e1n \u0111\u1ed5i theo th\u1ee9 t\u1ef1 sau:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><p>Thay c\u00e1p n\u1ed1i s\u1ee3i quang<\/p><\/li>\n\n\n\n<li><p>Ho\u00e1n \u0111\u1ed5i <a href=\"https:\/\/www.l-p.com\/products\/476023.htm\" target=\"_self\">m\u00f4-\u0111un SFP<\/a> b\u1eb1ng \u0111\u01a1n v\u1ecb \u0111\u00e3 bi\u1ebft l\u00e0 t\u1ed1t<\/p><\/li>\n\n\n\n<li><p>Ki\u1ec3m tra \u1edf c\u1ed5ng chuy\u1ec3n m\u1ea1ch kh\u00e1c<\/p><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch di\u1ec5n gi\u1ea3i k\u1ebft qu\u1ea3:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ef1 c\u1ed1 \u0111i theo c\u00e1p \u2192 v\u1ea5n \u0111\u1ec1 v\u1ec1 s\u1ee3i quang<\/p><\/li>\n\n\n\n<li><p>S\u1ef1 c\u1ed1 \u0111i theo SFP \u2192 module b\u1ecb l\u1ed7i<\/p><\/li>\n\n\n\n<li><p>S\u1ef1 c\u1ed1 v\u1eabn t\u1ed3n t\u1ea1i t\u1ea1i c\u1ed5ng \u2192 v\u1ea5n \u0111\u1ec1 ph\u1ea7n c\u1ee9ng chuy\u1ec3n m\u1ea1ch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>B\u01b0\u1edbc n\u00e0y lo\u1ea1i b\u1ecf vi\u1ec7c ph\u1ecfng \u0111o\u00e1n v\u00e0 x\u00e1c nh\u1eadn ch\u00ednh x\u00e1c th\u00e0nh ph\u1ea7n b\u1ecb l\u1ed7i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 7 \u2014 Xem l\u1ea1i c\u1ea5u h\u00ecnh v\u00e0 nh\u1eadt k\u00fd chuy\u1ec3n m\u1ea1ch<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Cu\u1ed1i c\u00f9ng, x\u00e1c minh c\u00e1c thi\u1ebft l\u1eadp \u1edf c\u1ea5p h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ki\u1ec3m tra c\u00e1c m\u1ee5c sau:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c c\u1ed5ng b\u1ecb v\u00f4 hi\u1ec7u h\u00f3a do l\u1ed7i<\/p><\/li>\n\n\n\n<li><p>Kh\u00f4ng kh\u1edbp t\u1ed1c \u0111\u1ed9\/ch\u1ebf \u0111\u1ed9 song c\u00f4ng<\/p><\/li>\n\n\n\n<li><p>V\u1ea5n \u0111\u1ec1 v\u1ec1 t\u1ef1 th\u01b0\u01a1ng l\u01b0\u1ee3ng (auto-negotiation)<\/p><\/li>\n\n\n\n<li><p>Tr\u1ea1ng th\u00e1i t\u1eaft giao di\u1ec7n<\/p><\/li>\n\n\n\n<li><p>Nh\u1eadt k\u00fd h\u1ec7 th\u1ed1ng hi\u1ec3n th\u1ecb l\u1ed7i b\u1ed9 thu ph\u00e1t quang (transceiver)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>M\u1ed9t s\u1ed1 s\u1ef1 c\u1ed1 SFP ho\u00e0n to\u00e0n kh\u00f4ng ph\u1ea3i do nguy\u00ean nh\u00e2n v\u1eadt l\u00fd m\u00e0 do tr\u1ea1ng th\u00e1i ph\u1ea7n m\u1ec1m ho\u1eb7c c\u1ea5u h\u00ecnh l\u00e0m ch\u1eb7n k\u1ebft n\u1ed1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quy tr\u00ecnh ch\u1ea9n \u0111o\u00e1n s\u1ef1 c\u1ed1 SFP \u0111\u00fang chu\u1ea9n lu\u00f4n tu\u00e2n theo logic n\u00e0y:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ki\u1ec3m tra v\u1eadt l\u00fd \u2192 L\u00e0m s\u1ea1ch s\u1ee3i quang \u2192 X\u00e1c minh vi\u1ec7c ph\u00e1t hi\u1ec7n \u2192 Ki\u1ec3m tra t\u00ednh t\u01b0\u01a1ng th\u00edch \u2192 Ki\u1ec3m tra c\u00f4ng su\u1ea5t quang \u2192 Ho\u00e1n \u0111\u1ed5i th\u00e0nh ph\u1ea7n \u2192 Xem l\u1ea1i c\u1ea5u h\u00ecnh<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u1ea7n l\u1edbn s\u1ef1 c\u1ed1 \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft trong ba b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean, trong khi ki\u1ec3m tra s\u00e2u h\u01a1n ch\u1ec9 c\u1ea7n thi\u1ebft \u0111\u1ed1i v\u1edbi c\u00e1c s\u1ef1 c\u1ed1 dai d\u1eb3ng ho\u1eb7c ph\u1ee9c t\u1ea1p. C\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 c\u1ea5u tr\u00fac n\u00e0y gi\u00fap gi\u1ea3m \u0111\u00e1ng k\u1ec3 th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng v\u00e0 ng\u0103n ng\u1eeba vi\u1ec7c thay th\u1ebf ph\u1ea7n c\u1ee9ng kh\u00f4ng c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd37 C\u00e1ch ki\u1ec3m tra xem m\u1ed9t SFP c\u00f3 \u0111ang ho\u1ea1t \u0111\u1ed9ng hay kh\u00f4ng<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c ki\u1ec3m tra xem m\u1ed9t SFP c\u00f3 ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang c\u00e1ch hay kh\u00f4ng \u0111\u00f2i h\u1ecfi nhi\u1ec1u h\u01a1n vi\u1ec7c ch\u1ec9 ki\u1ec3m tra xem li\u00ean k\u1ebft c\u00f3 \u201cl\u00ean\u201d hay kh\u00f4ng. Trong m\u00f4i tr\u01b0\u1eddng m\u1ea1ng th\u1ef1c t\u1ebf, m\u1ed9t SFP c\u00f3 th\u1ec3 tr\u00f4ng nh\u01b0 \u0111ang ho\u1ea1t \u0111\u1ed9ng nh\u01b0ng v\u1eabn ho\u1ea1t \u0111\u1ed9ng k\u00e9m do c\u00f4ng su\u1ea5t quang th\u1ea5p, ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u \u1edf ng\u01b0\u1ee1ng gi\u1edbi h\u1ea1n ho\u1eb7c l\u1ed7i ph\u1ea7n c\u1ee9ng gi\u00e1n \u0111o\u1ea1n. M\u1ed9t quy tr\u00ecnh x\u00e1c th\u1ef1c \u0111\u00fang chu\u1ea9n k\u1ebft h\u1ee3p ki\u1ec3m tra v\u1eadt l\u00fd, ch\u1ea9n \u0111o\u00e1n t\u1eeb chuy\u1ec3n m\u1ea1ch, \u0111o l\u01b0\u1eddng quang h\u1ecdc v\u00e0 ki\u1ec3m tra l\u01b0u l\u01b0\u1ee3ng th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2f80eb6905bd424591684a265da3d977.jpg\" alt=\"How to Test Whether an SFP Is Working\" class=\"wp-image-2771\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2f80eb6905bd424591684a265da3d977.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2f80eb6905bd424591684a265da3d977-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2f80eb6905bd424591684a265da3d977-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2f80eb6905bd424591684a265da3d977-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2f80eb6905bd424591684a265da3d977-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t khu\u00f4n kh\u1ed5 ki\u1ec3m tra th\u1ef1c ti\u1ec5n, h\u01b0\u1edbng \u0111\u1ebfn th\u1ef1c \u0111\u1ecba, \u0111\u01b0\u1ee3c c\u00e1c k\u1ef9 s\u01b0 m\u1ea1ng s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c nh\u1eadn t\u00ecnh tr\u1ea1ng s\u1ee9c kh\u1ecfe c\u1ee7a SFP.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 1 \u2014 X\u00e1c nh\u1eadn tr\u1ea1ng th\u00e1i li\u00ean k\u1ebft v\u1eadt l\u00fd (Ki\u1ec3m tra c\u01a1 b\u1ea3n)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eaft \u0111\u1ea7u b\u1eb1ng ch\u1ec9 b\u00e1o \u0111\u01a1n gi\u1ea3n nh\u1ea5t: tr\u1ea1ng th\u00e1i li\u00ean k\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u1ea7n ki\u1ec3m tra nh\u1eefng g\u00ec:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Tr\u1ea1ng th\u00e1i c\u1ed5ng chuy\u1ec3n m\u1ea1ch hi\u1ec3n th\u1ecb up\/up<\/p><\/li>\n\n\n\n<li><p>\u0110\u00e8n LED li\u00ean k\u1ebft \u0111ang ho\u1ea1t \u0111\u1ed9ng (m\u00e0u xanh ho\u1eb7c nh\u1ea5p nh\u00e1y t\u00f9y thi\u1ebft b\u1ecb)<\/p><\/li>\n\n\n\n<li><p>Kh\u00f4ng c\u00f3 s\u1ef1 ki\u1ec7n m\u1ea5t li\u00ean k\u1ebft ngay l\u1eadp t\u1ee9c sau khi k\u1ebft n\u1ed1i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110i\u1ec1u n\u00e0y cho b\u1ea1n bi\u1ebft:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u00f4-\u0111un SFP \u0111\u01b0\u1ee3c nh\u1eadn d\u1ea1ng v\u1ec1 m\u1eb7t v\u1eadt l\u00fd<\/p><\/li>\n\n\n\n<li><p>\u0110\u01b0\u1eddng d\u1eabn s\u1ee3i quang \u00edt nh\u1ea5t m\u1ed9t ph\u1ea7n \u0111ang ho\u1ea1t \u0111\u1ed9ng<\/p><\/li>\n\n\n\n<li><p>Vi\u1ec7c truy\u1ec1n \u00e1nh s\u00e1ng c\u01a1 b\u1ea3n gi\u1eefa TX\/RX \u0111ang di\u1ec5n ra<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>H\u1ea1n ch\u1ebf:<\/strong><br>Tr\u1ea1ng th\u00e1i li\u00ean k\u1ebft l\u00ean kh\u00f4ng \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng hi\u1ec7u n\u0103ng, ch\u1ec9 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i c\u01a1 b\u1ea3n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 2 \u2014 X\u00e1c minh vi\u1ec7c ph\u00e1t hi\u1ec7n SFP tr\u00ean b\u1ed9 chuy\u1ec3n m\u1ea1ch<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1eed d\u1ee5ng CLI ho\u1eb7c c\u00f4ng c\u1ee5 qu\u1ea3n tr\u1ecb c\u1ee7a b\u1ed9 chuy\u1ec3n m\u1ea1ch \u0111\u1ec3 x\u00e1c nh\u1eadn vi\u1ec7c nh\u1eadn di\u1ec7n m\u00f4-\u0111un.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ki\u1ec3m tra c\u00e1c m\u1ee5c sau:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ph\u00e1t hi\u1ec7n m\u00f4 h\u00ecnh v\u00e0 nh\u00e0 cung c\u1ea5p SFP<\/p><\/li>\n\n\n\n<li><p>T\u1ed1c \u0111\u1ed9 v\u00e0 lo\u1ea1i giao di\u1ec7n (1G \/ 10G \/ SFP \/ <a href=\"https:\/\/www.l-p.com\/store-26192-10g-sfp.htm\" target=\"_self\">SFP+<\/a>)<\/p><\/li>\n\n\n\n<li><p>C\u00e1c th\u00f4ng b\u00e1o l\u1ed7i nh\u01b0:<\/p>\n<ul class=\"wp-block-list\">\n<li><p>\u201cb\u1ed9 thu ph\u00e1t kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3\u201d<br>\u201d<\/p><\/li>\n\n\n\n<li><p>\u201cm\u00f4-\u0111un kh\u00f4ng c\u00f3\u201d<\/p><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Di\u1ec5n gi\u1ea3i:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>SFP \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n \u0111\u00fang \u2192 ph\u1ea7n c\u1ee9ng \u0111\u00e3 \u0111\u01b0\u1ee3c nh\u1eadn di\u1ec7n v\u00e0 kh\u1edfi t\u1ea1o<\/p><\/li>\n\n\n\n<li><p>Kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n \u2192 v\u1ea5n \u0111\u1ec1 ti\u1ebfp x\u00fac, l\u1ed7i ph\u1ea7n c\u1ee9ng ho\u1eb7c kh\u00f4ng t\u01b0\u01a1ng th\u00edch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>N\u1ebfu thi\u1ebft b\u1ecb kh\u00f4ng th\u1ec3 nh\u1eadn di\u1ec7n SFP, vi\u1ec7c ki\u1ec3m tra quang h\u1ecdc th\u00eam l\u00e0 kh\u00f4ng c\u1ea7n thi\u1ebft cho \u0111\u1ebfn khi v\u1ea5n \u0111\u1ec1 n\u00e0y \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 3 \u2014 Ki\u1ec3m tra m\u1ee9c c\u00f4ng su\u1ea5t quang (Ki\u1ec3m tra Tx\/Rx)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng b\u00e0i ki\u1ec3m tra quan tr\u1ecdng nh\u1ea5t \u0111\u1ed1i v\u1edbi s\u1ee9c kh\u1ecfe SFP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u1ea7n \u0111o l\u01b0\u1eddng nh\u1eefng g\u00ec:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t Tx (Truy\u1ec1n)<strong>:<\/strong> \u00c1nh s\u00e1ng \u0111\u01b0\u1ee3c g\u1eedi t\u1eeb SFP<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t Rx (Nh\u1eadn)<strong>:<\/strong> \u00c1nh s\u00e1ng \u0111\u01b0\u1ee3c nh\u1eadn t\u1eeb \u0111\u1ea7u xa<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c c\u00f4ng c\u1ee5 \u0111i\u1ec3n h\u00ecnh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>L\u1ec7nh CLI c\u1ee7a b\u1ed9 chuy\u1ec3n m\u1ea1ch (v\u00ed d\u1ee5: ch\u1ea9n \u0111o\u00e1n b\u1ed9 thu ph\u00e1t)<\/p><\/li>\n\n\n\n<li><p>B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n gi\u00e1m s\u00e1t m\u1ea1ng<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ed3ng h\u1ed3 \u0111o c\u00f4ng su\u1ea5t quang (ki\u1ec3m tra n\u00e2ng cao)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch di\u1ec5n gi\u1ea3i k\u1ebft qu\u1ea3:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ph\u1ea1m vi Tx\/Rx b\u00ecnh th\u01b0\u1eddng \u2192 SFP v\u00e0 \u0111\u01b0\u1eddng d\u1eabn s\u1ee3i quang \u1edf tr\u1ea1ng th\u00e1i t\u1ed1t<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t Rx th\u1ea5p \u2192 t\u1ed5n th\u1ea5t s\u1ee3i quang, \u0111\u1ea7u n\u1ed1i b\u1ea9n, kho\u1ea3ng c\u00e1ch qu\u00e1 xa<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t Tx b\u1eb1ng kh\u00f4ng \u2192 kh\u1ea3 n\u0103ng h\u1ecfng b\u1ed9 ph\u00e1t SFP<\/p><\/li>\n\n\n\n<li><p>Gi\u00e1 tr\u1ecb dao \u0111\u1ed9ng \u2192 v\u1ea5n \u0111\u1ec1 b\u1ea5t \u1ed5n v\u1ec1 quang h\u1ecdc ho\u1eb7c ph\u1ea7n c\u1ee9ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t:<br><\/strong><br>Ki\u1ec3m tra c\u00f4ng su\u1ea5t quang l\u00e0 ch\u1ec9 s\u1ed1 \u0111\u00e1ng tin c\u1eady nh\u1ea5t v\u1ec1 t\u00ecnh tr\u1ea1ng th\u1ef1c t\u1ebf c\u1ee7a hi\u1ec7u n\u0103ng SFP.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 4 \u2014 Th\u1ef1c hi\u1ec7n ki\u1ec3m tra loopback s\u1ee3i quang (Ki\u1ec3m tra c\u00f4 l\u1eadp)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ec3m tra loopback gi\u00fap x\u00e1c \u0111\u1ecbnh r\u00f5 nguy\u00ean nh\u00e2n s\u1ef1 c\u1ed1 n\u1eb1m \u1edf SFP hay \u0111\u01b0\u1eddng d\u1eabn s\u1ee3i quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>K\u1ebft n\u1ed1i SFP v\u1edbi b\u1ed9 chuy\u1ec3n \u0111\u1ed5i loopback ho\u1eb7c u\u1ed1n v\u00f2ng s\u1ee3i quang tr\u1edf l\u1ea1i ch\u00ednh n\u00f3 (n\u1ebfu \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3)<\/p><\/li>\n\n\n\n<li><p>Thi\u1ebft b\u1ecb g\u1eedi v\u00e0 nh\u1eadn t\u00edn hi\u1ec7u qua c\u00f9ng m\u1ed9t m\u00f4-\u0111un<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110i\u1ec1u n\u00e0y cho b\u1ea1n bi\u1ebft:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>N\u1ebfu ki\u1ec3m tra loopback th\u00e0nh c\u00f4ng \u2192 b\u1ed9 ph\u00e1t v\u00e0 b\u1ed9 thu c\u1ee7a SFP ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng<\/p><\/li>\n\n\n\n<li><p>N\u1ebfu ki\u1ec3m tra loopback th\u1ea5t b\u1ea1i \u2192 ph\u1ea7n c\u1ee9ng SFP c\u00f3 kh\u1ea3 n\u0103ng b\u1ecb l\u1ed7i<\/p><\/li>\n\n\n\n<li><p>N\u1ebfu loopback ho\u1ea1t \u0111\u1ed9ng nh\u01b0ng li\u00ean k\u1ebft b\u1ecb l\u1ed7i trong m\u00f4i tr\u01b0\u1eddng s\u1ea3n xu\u1ea5t \u2192 v\u1ea5n \u0111\u1ec1 c\u00e1p quang b\u00ean ngo\u00e0i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>B\u00e0i ki\u1ec3m tra n\u00e0y lo\u1ea1i b\u1ecf c\u00e1c bi\u1ebfn s\u1ed1 b\u00ean ngo\u00e0i v\u00e0 c\u00f4 l\u1eadp <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">m\u00f4-\u0111un SFP<\/a> ch\u00ednh n\u00f3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 5 \u2014 Ki\u1ec3m tra v\u1edbi c\u00e1p quang \u0111\u00e3 x\u00e1c minh l\u00e0 t\u1ed1t<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c s\u1ef1 c\u1ed1 li\u00ean quan \u0111\u1ebfn c\u00e1p th\u01b0\u1eddng b\u1ecb nh\u1ea7m l\u1eabn l\u00e0 l\u1ed7i SFP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Quy tr\u00ecnh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Thay th\u1ebf c\u00e1p n\u1ed1i quang hi\u1ec7n t\u1ea1i b\u1eb1ng m\u1ed9t c\u00e1p \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh l\u00e0 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t<\/p><\/li>\n\n\n\n<li><p>Ki\u1ec3m tra l\u1ea1i li\u00ean k\u1ebft v\u00e0 c\u00f4ng su\u1ea5t quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Gi\u1ea3i th\u00edch k\u1ebft qu\u1ea3:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>V\u1ea5n \u0111\u1ec1 \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft \u2192 c\u00e1p quang ban \u0111\u1ea7u b\u1ecb l\u1ed7i ho\u1eb7c b\u1ecb nhi\u1ec5m b\u1ea9n<\/p><\/li>\n\n\n\n<li><p>Kh\u00f4ng c\u00f3 thay \u0111\u1ed5i \u2192 kh\u1ea3 n\u0103ng cao v\u1eabn c\u00f2n v\u1ea5n \u0111\u1ec1 \u1edf SFP ho\u1eb7c c\u1ed5ng switch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t:<br><\/strong><br>M\u1ed9t t\u1ef7 l\u1ec7 l\u1edbn c\u00e1c tr\u01b0\u1eddng h\u1ee3p \u201ch\u1ecfng SFP\u201d th\u1ef1c t\u1ebf l\u00e0 do suy gi\u1ea3m ho\u1eb7c nhi\u1ec5m b\u1ea9n c\u00e1p quang.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 6 \u2014 Ho\u00e1n \u0111\u1ed5i module SFP (ki\u1ec3m tra so s\u00e1nh A\/B)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng b\u01b0\u1edbc x\u00e1c nh\u1eadn mang t\u00ednh quy\u1ebft \u0111\u1ecbnh nh\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Quy tr\u00ecnh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Thay th\u1ebf module SFP nghi ng\u1edd b\u1eb1ng m\u1ed9t module t\u1ed1t \u0111\u00e3 bi\u1ebft, c\u00f3 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt gi\u1ed1ng h\u1ec7t<\/p><\/li>\n\n\n\n<li><p>Quan s\u00e1t h\u00e0nh vi li\u00ean k\u1ebft v\u00e0 c\u00e1c gi\u00e1 tr\u1ecb \u0111o c\u00f4ng su\u1ea5t quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c k\u1ebft qu\u1ea3 c\u00f3 th\u1ec3 x\u1ea3y ra:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>V\u1ea5n \u0111\u1ec1 bi\u1ebfn m\u1ea5t \u2192 SFP ban \u0111\u1ea7u b\u1ecb l\u1ed7i<\/p><\/li>\n\n\n\n<li><p>V\u1ea5n \u0111\u1ec1 v\u1eabn t\u1ed3n t\u1ea1i \u2192 nguy\u00ean nh\u00e2n n\u1eb1m \u1edf c\u00e1p quang, c\u1ea5u h\u00ecnh ho\u1eb7c c\u1ed5ng switch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>\u0110\u00e2y l\u00e0 c\u00e1ch nhanh nh\u1ea5t \u0111\u1ec3 x\u00e1c nh\u1eadn s\u1ef1 c\u1ed1 \u1edf c\u1ea5p ph\u1ea7n c\u1ee9ng so v\u1edbi s\u1ef1 c\u1ed1 do y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 7 \u2014 X\u00e1c th\u1ef1c \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a l\u01b0u l\u01b0\u1ee3ng th\u1ef1c t\u1ebf<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t li\u00ean k\u1ebft ho\u1ea1t \u0111\u1ed9ng l\u00e0 ch\u01b0a \u0111\u1ee7; n\u00f3 ph\u1ea3i \u1ed5n \u0111\u1ecbnh d\u01b0\u1edbi t\u1ea3i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u1ea7n ki\u1ec3m tra nh\u1eefng g\u00ec:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c b\u00e0i ki\u1ec3m tra ping li\u00ean t\u1ee5c<\/p><\/li>\n\n\n\n<li><p>C\u00e1c b\u00e0i ki\u1ec3m tra th\u00f4ng l\u01b0\u1ee3ng (iperf ho\u1eb7c c\u00f4ng c\u1ee5 t\u01b0\u01a1ng t\u1ef1)<\/p><\/li>\n\n\n\n<li><p>B\u1ed9 \u0111\u1ebfm l\u1ed7i (CRC, g\u00f3i b\u1ecb b\u1ecf qua, g\u00f3i g\u1eedi l\u1ea1i)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eefng \u0111i\u1ec3m c\u1ea7n ch\u00fa \u00fd:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ea5t g\u00f3i d\u01b0\u1edbi t\u1ea3i<\/p><\/li>\n\n\n\n<li><p>B\u1ed9 \u0111\u1ebfm l\u1ed7i t\u0103ng d\u1ea7n<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ec9nh \u0111i\u1ec3m \u0111\u1ed9 tr\u1ec5 ho\u1eb7c \u0111\u1ed9 m\u00e9o (jitter)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>M\u1ed9t s\u1ed1 <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-25832-1-2-4g-transceiver-modules.htm\">SFP<br><\/a> v\u01b0\u1ee3t qua c\u00e1c b\u00e0i ki\u1ec3m tra li\u00ean k\u1ebft c\u01a1 b\u1ea3n nh\u01b0ng th\u1ea5t b\u1ea1i khi ch\u1ecbu t\u1ea3i l\u01b0u l\u01b0\u1ee3ng th\u1ef1c t\u1ebf, cho th\u1ea5y hi\u1ec7u su\u1ea5t quang \u1edf ng\u01b0\u1ee1ng gi\u1edbi h\u1ea1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t module SFP ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang ph\u1ea3i \u0111\u00e1p \u1ee9ng \u0111\u1ea7y \u0111\u1ee7 c\u00e1c \u0111i\u1ec1u ki\u1ec7n sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u01b0\u1ee3c switch ph\u00e1t hi\u1ec7n ch\u00ednh x\u00e1c<\/p><\/li>\n\n\n\n<li><p>Tr\u1ea1ng th\u00e1i li\u00ean k\u1ebft \u1ed5n \u0111\u1ecbnh (kh\u00f4ng nh\u1ea5p nh\u00e1y)<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t quang Tx\/Rx n\u1eb1m trong ph\u1ea1m vi ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c<\/p><\/li>\n\n\n\n<li><p>Kh\u00f4ng c\u00f3 b\u1ed9 \u0111\u1ebfm l\u1ed7i \u0111\u00e1ng k\u1ec3<\/p><\/li>\n\n\n\n<li><p>Hi\u1ec7u n\u0103ng \u1ed5n \u0111\u1ecbnh d\u01b0\u1edbi t\u1ea3i l\u01b0u l\u01b0\u1ee3ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea5t k\u1ef3 \u0111i\u1ec1u ki\u1ec7n n\u00e0o trong s\u1ed1 n\u00e0y kh\u00f4ng \u0111\u1ea1t, v\u1ea5n \u0111\u1ec1 c\u00f3 th\u1ec3 kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 \u201cho\u1ea1t \u0111\u1ed9ng hay kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng\u201d, m\u00e0 l\u00e0 m\u1ed9t s\u1ef1 c\u1ed1 s\u00e2u h\u01a1n li\u00ean quan \u0111\u1ebfn hi\u1ec7u su\u1ea5t quang, t\u01b0\u01a1ng th\u00edch ho\u1eb7c suy gi\u1ea3m ph\u1ea7n c\u1ee9ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch ti\u1ebfp c\u1eadn ki\u1ec3m tra c\u00f3 c\u1ea5u tr\u00fac n\u00e0y \u0111\u1ea3m b\u1ea3o ch\u1ea9n \u0111o\u00e1n ch\u00ednh x\u00e1c v\u00e0 ng\u0103n ng\u1eeba vi\u1ec7c thay th\u1ebf kh\u00f4ng c\u1ea7n thi\u1ebft c\u00e1c module \u0111ang ho\u1ea1t \u0111\u1ed9ng t\u1ed1t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd37 Danh s\u00e1ch ki\u1ec3m tra t\u01b0\u01a1ng th\u00edch SFP tr\u01b0\u1edbc khi b\u1ea1n thay th\u1ebf module<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi thay th\u1ebf m\u00f4-\u0111un SFP, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i x\u00e1c minh t\u00ednh t\u01b0\u01a1ng th\u00edch tr\u00ean to\u00e0n b\u1ed9 \u0111\u01b0\u1eddng truy\u1ec1n quang. Trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p th\u1ef1c t\u1ebf, ch\u00ednh m\u00f4-\u0111un SFP kh\u00f4ng b\u1ecb l\u1ed7i \u2014 c\u00e1c s\u1ef1 c\u1ed1 ph\u00e1t sinh do th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt kh\u00f4ng kh\u1edbp, h\u1ea1n ch\u1ebf c\u1ee7a nh\u00e0 cung c\u1ea5p ho\u1eb7c gh\u00e9p s\u1ee3i quang sai. Vi\u1ec7c ki\u1ec3m tra t\u00ednh t\u01b0\u01a1ng th\u00edch theo quy tr\u00ecnh gi\u00fap lo\u1ea1i b\u1ecf vi\u1ec7c thay th\u1ebf kh\u00f4ng c\u1ea7n thi\u1ebft v\u00e0 gi\u1ea3m th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ea1ng.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/290332b0991445a6992cac20347ba6c2.jpg\" alt=\"SFP Compatibility Checklist Before You Replace the Module\" class=\"wp-image-2772\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/290332b0991445a6992cac20347ba6c2.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/290332b0991445a6992cac20347ba6c2-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/290332b0991445a6992cac20347ba6c2-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/290332b0991445a6992cac20347ba6c2-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/290332b0991445a6992cac20347ba6c2-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">X\u00e1c minh t\u1ed1c \u0111\u1ed9 SFP v\u00e0 lo\u1ea1i c\u1ed5ng kh\u1edbp nhau<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t trong nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn nh\u1ea5t v\u1ec1 t\u00ednh t\u01b0\u01a1ng th\u00edch l\u00e0 s\u1eed d\u1ee5ng sai l\u1edbp t\u1ed1c \u0111\u1ed9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ki\u1ec3m tra c\u00e1c y\u1ebfu t\u1ed1 sau:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a href=\"https:\/\/www.l-p.com\/products\/476763.htm\" target=\"_self\">SFP 1G<\/a> v\u00e0. <a href=\"https:\/\/www.l-p.com\/products\/475415.htm\" target=\"_self\">SFP+ 10G<\/a> so v\u1edbi c\u00e1c phi\u00ean b\u1ea3n t\u1ed1c \u0111\u1ed9 cao h\u01a1n<\/p><\/li>\n\n\n\n<li><p>Kh\u1ea3 n\u0103ng c\u1ee7a c\u1ed5ng chuy\u1ec3n m\u1ea1ch (c\u00f3 h\u1ed7 tr\u1ee3 t\u1ed1c \u0111\u1ed9 c\u1ee7a m\u00f4-\u0111un \u0111\u01b0\u1ee3c c\u1eafm v\u00e0o hay kh\u00f4ng?)<\/p><\/li>\n\n\n\n<li><p>H\u1ed7 tr\u1ee3 t\u1ef1 th\u01b0\u01a1ng l\u01b0\u1ee3ng t\u1ed1c \u0111\u1ed9 (n\u1ebfu \u00e1p d\u1ee5ng)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u00f4-\u0111un SFP+ 10G \u0111\u01b0\u1ee3c c\u1eafm v\u00e0o c\u1ed5ng ch\u1ec9 h\u1ed7 tr\u1ee3 1G<\/p><\/li>\n\n\n\n<li><p>C\u1ed5ng b\u1ecb kh\u00f3a \u1edf t\u1ed1c \u0111\u1ed9 c\u1ed1 \u0111\u1ecbnh kh\u00f4ng kh\u1edbp v\u1edbi m\u00f4-\u0111un<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u1ea1i sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>Sai l\u1ec7ch t\u1ed1c \u0111\u1ed9 th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn kh\u00f4ng b\u1eaft \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i ho\u1eb7c l\u1ed7i \u201cm\u00f4-\u0111un kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3\u201d, ngay c\u1ea3 khi ph\u1ea7n c\u1ee9ng ho\u00e0n to\u00e0n b\u00ecnh th\u01b0\u1eddng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">X\u00e1c nh\u1eadn t\u00ednh t\u01b0\u01a1ng th\u00edch lo\u1ea1i s\u1ee3i quang (\u0111\u01a1n mode so v\u1edbi \u0111a mode)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sai l\u1ec7ch lo\u1ea1i s\u1ee3i quang l\u00e0 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u00e2y ra s\u1ef1 c\u1ed1 SFP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ki\u1ec3m tra:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ee3i quang \u0111\u01a1n mode (SMF) so v\u1edbi s\u1ee3i quang \u0111a mode (MMF)<\/p><\/li>\n\n\n\n<li><p>K\u00fd hi\u1ec7u SFP \u0111\u00fang (v\u00ed d\u1ee5:, <a href=\"https:\/\/www.l-p.com\/products\/475415.htm\" target=\"_self\">SR<\/a> cho MMF, <a href=\"https:\/\/www.l-p.com\/products\/475586.htm\" target=\"_self\">LR<\/a> cho SMF)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c v\u1ea5n \u0111\u1ec1 \u0111i\u1ec3n h\u00ecnh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a href=\"https:\/\/www.l-p.com\/products\/491477.htm\" target=\"_self\">SFP \u0111\u01a1n mode (SM SFP)<\/a> d\u00f9ng tr\u00ean s\u1ee3i \u0111a mode (MM fiber) \u2192 t\u00edn hi\u1ec7u y\u1ebfu ho\u1eb7c kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u<\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/www.l-p.com\/products\/478231.htm\" target=\"_self\">SFP \u0111a mode (MM SFP)<\/a> d\u00f9ng tr\u00ean s\u1ee3i \u0111\u01a1n mode (SM fiber) \u2192 m\u1ea5t k\u1ebft n\u1ed1i ho\u1eb7c k\u1ebft n\u1ed1i kh\u00f4ng \u1ed5n \u0111\u1ecbnh<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u1ea1i sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>T\u00edn hi\u1ec7u quang \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf d\u00e0nh ri\u00eang cho l\u00f5i s\u1ee3i quang c\u1ee5 th\u1ec3, v\u00e0 s\u1ef1 kh\u00f4ng kh\u1edbp d\u1eabn \u0111\u1ebfn suy hao cao v\u00e0 m\u1ea5t t\u00edn hi\u1ec7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110\u1ea3m b\u1ea3o b\u01b0\u1edbc s\u00f3ng kh\u1edbp nhau tr\u00ean to\u00e0n b\u1ed9 \u0111\u01b0\u1eddng truy\u1ec1n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ea3 hai \u0111\u1ea7u c\u1ee7a \u0111\u01b0\u1eddng truy\u1ec1n s\u1ee3i quang \u0111\u1ec1u ph\u1ea3i s\u1eed d\u1ee5ng b\u01b0\u1edbc s\u00f3ng t\u01b0\u01a1ng th\u00edch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ki\u1ec3m tra:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>850nm (t\u1ea7m ng\u1eafn, MMF)<\/p><\/li>\n\n\n\n<li><p>1310nm (\u1ee9ng d\u1ee5ng LR ph\u1ed5 bi\u1ebfn)<\/p><\/li>\n\n\n\n<li><p>1550nm (\u1ee9ng d\u1ee5ng t\u1ea7m xa)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Sai l\u1ea7m ph\u1ed5 bi\u1ebfn:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng c\u1eb7p SFP kh\u00f4ng kh\u1edbp b\u01b0\u1edbc s\u00f3ng \u1edf hai \u0111\u1ea7u s\u1ee3i quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u1ea1i sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>Sai l\u1ec7ch b\u01b0\u1edbc s\u00f3ng d\u1eabn \u0111\u1ebfn kh\u00f4ng ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c \u00e1nh s\u00e1ng ho\u1eb7c c\u00f4ng su\u1ea5t thu (Rx power) c\u1ef1c k\u1ef3 y\u1ebfu, ngay c\u1ea3 khi t\u1ea5t c\u1ea3 th\u00e0nh ph\u1ea7n kh\u00e1c \u0111\u1ec1u \u0111\u00fang.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ki\u1ec3m tra t\u00ednh t\u01b0\u01a1ng th\u00edch nh\u00e0 cung c\u1ea5p v\u00e0 c\u00e1c h\u1ea1n ch\u1ebf thi\u1ebft b\u1ecb<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch hi\u1ec7n \u0111\u1ea1i th\u01b0\u1eddng \u00e1p d\u1ee5ng ki\u1ec3m tra nghi\u00eam ng\u1eb7t \u0111\u1ed1i v\u1edbi c\u00e1c module quang h\u1ecdc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ki\u1ec3m tra c\u00e1c m\u1ee5c sau:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Danh s\u00e1ch tr\u1eafng SFP \u0111\u1eb7c th\u00f9 theo nh\u00e0 cung c\u1ea5p (<a href=\"https:\/\/www.l-p.com\/products\/477562.htm\" target=\"_self\">Cisco<\/a>, <a href=\"https:\/\/www.l-p.com\/products\/482145.htm\" target=\"_self\">Arista<\/a>, <a href=\"https:\/\/www.l-p.com\/products\/482246.htm\" target=\"_self\">Juniper<br><\/a>, v.v.)<\/p><\/li>\n\n\n\n<li><p>\u201cC\u1ea3nh b\u00e1o \u201db\u1ed9 thu ph\u00e1t kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3\u201d<\/p><\/li>\n\n\n\n<li><p>H\u1ea1n ch\u1ebf firmware \u0111\u1ed1i v\u1edbi module quang h\u1ecdc c\u1ee7a b\u00ean th\u1ee9 ba<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c k\u1ebft qu\u1ea3 \u0111i\u1ec3n h\u00ecnh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Module v\u1eabn ho\u1ea1t \u0111\u1ed9ng v\u1ec1 m\u1eb7t v\u1eadt l\u00fd nh\u01b0ng b\u1ecb firmware ch\u1eb7n<\/p><\/li>\n\n\n\n<li><p>C\u1ed5ng v\u1eabn \u1edf tr\u1ea1ng th\u00e1i down d\u00f9 c\u1ea5u h\u00ecnh \u0111\u00e3 \u0111\u00fang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u1ea1i sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>Nhi\u1ec1u \u201cSFP b\u1ecb l\u1ed7i\u201d th\u1ef1c t\u1ebf l\u00e0 module quang h\u1ecdc b\u1ecb h\u1ea1n ch\u1ebf b\u1edfi ch\u00ednh s\u00e1ch, ch\u1ee9 kh\u00f4ng ph\u1ea3i ph\u1ea7n c\u1ee9ng b\u1ecb h\u1ecfng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">X\u00e1c th\u1ef1c lo\u1ea1i b\u1ed9 k\u1ebft n\u1ed1i v\u00e0 c\u00e1p<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 c\u00e1c m\u00f4-\u0111un SFP t\u01b0\u01a1ng th\u00edch c\u0169ng s\u1ebd th\u1ea5t b\u1ea1i n\u1ebfu \u0111\u01b0\u1ee3c gh\u00e9p v\u1edbi c\u00e1p kh\u00f4ng \u0111\u00fang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ki\u1ec3m tra:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u00ednh t\u01b0\u01a1ng th\u00edch gi\u1eefa lo\u1ea1i \u0111\u1ea7u n\u1ed1i LC v\u00e0 SC<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ea3m b\u1ea3o c\u1ef1c t\u00ednh ch\u00ednh x\u00e1c (Tx \u2192 Rx, Rx \u2192 Tx)<\/p><\/li>\n\n\n\n<li><p>T\u00ecnh tr\u1ea1ng v\u00e0 \u0111\u1ed9 s\u1ea1ch c\u1ee7a d\u00e2y nh\u1ea3y quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c c\u1eb7p s\u1ee3i quang b\u1ecb \u0111\u1ea3o ng\u01b0\u1ee3c<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ea7u n\u1ed1i b\u1ecb h\u01b0 h\u1ecfng ho\u1eb7c nhi\u1ec5m b\u1ea9n<\/p><\/li>\n\n\n\n<li><p>C\u1ea5u h\u00ecnh b\u1ea3ng \u0111\u1ea5u n\u1ed1i kh\u00f4ng \u0111\u00fang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u1ea1i sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>Vi\u1ec7c s\u1eed d\u1ee5ng sai c\u00e1p th\u01b0\u1eddng b\u1ecb nh\u1ea7m l\u00e0 l\u1ed7i m\u00f4-\u0111un, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c tri\u1ec3n khai m\u1edbi.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 kho\u1ea3ng c\u00e1ch v\u00e0 ng\u00e2n s\u00e1ch quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed7i m\u00f4-\u0111un SFP \u0111\u1ec1u c\u00f3 gi\u1edbi h\u1ea1n truy\u1ec1n d\u1eabn \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh r\u00f5.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ki\u1ec3m tra:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kho\u1ea3ng c\u00e1ch h\u1ed7 tr\u1ee3 t\u1ed1i \u0111a (v\u00ed d\u1ee5: 300 m, 10 km, 40 km)<\/p><\/li>\n\n\n\n<li><p>T\u1ed5ng t\u1ed5n hao \u0111\u01b0\u1eddng truy\u1ec1n (\u0111\u1ea7u n\u1ed1i + s\u1ee3i quang + b\u1ea3ng \u0111\u1ea5u n\u1ed1i)<\/p><\/li>\n\n\n\n<li><p>D\u1ef1 ph\u00f2ng ng\u00e2n s\u00e1ch quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c v\u1ea5n \u0111\u1ec1 \u0111i\u1ec3n h\u00ecnh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110o\u1ea1n c\u00e1p v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n <a href=\"https:\/\/www.l-p.com\/blog\/technical-documentation\/sfp-optical-module-specifications.htm\" target=\"_blank\" rel=\"\">\u0111\u1eb7c t\u1ea3 SFP<\/a><\/p><\/li>\n\n\n\n<li><p>Qu\u00e1 nhi\u1ec1u \u0111\u1ea7u n\u1ed1i l\u00e0m gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t ph\u00e1t (Tx) kh\u00f4ng \u0111\u1ee7 cho c\u00e1c li\u00ean k\u1ebft kho\u1ea3ng c\u00e1ch xa<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u1ea1i sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>Ngay c\u1ea3 c\u00e1c m\u00f4-\u0111un SFP kh\u1edbp ho\u00e0n h\u1ea3o c\u0169ng s\u1ebd th\u1ea5t b\u1ea1i n\u1ebfu ng\u00e2n s\u00e1ch quang b\u1ecb v\u01b0\u1ee3t qu\u00e1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">X\u00e1c nh\u1eadn h\u1ed7 tr\u1ee3 ph\u1ea7n m\u1ec1m\u56fa\u4ef6 v\u00e0 ph\u1ea7n c\u1ee9ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Phi\u00ean b\u1ea3n ph\u1ea7n m\u1ec1m\u56fa\u4ef6 v\u00e0 phi\u00ean b\u1ea3n ph\u1ea7n c\u1ee9ng c\u1ee7a switch c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch c\u1ee7a SFP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ki\u1ec3m tra:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Phi\u00ean b\u1ea3n h\u1ec7 \u0111i\u1ec1u h\u00e0nh switch h\u1ed7 tr\u1ee3 m\u00f4-\u0111un SFP \u0111\u00e3 c\u00e0i \u0111\u1eb7t<\/p><\/li>\n\n\n\n<li><p>Ma tr\u1eadn t\u01b0\u01a1ng th\u00edch phi\u00ean b\u1ea3n ph\u1ea7n c\u1ee9ng<\/p><\/li>\n\n\n\n<li><p>C\u00e1c b\u1ea3n n\u00e2ng c\u1ea5p ph\u1ea7n m\u1ec1m\u56fa\u4ef6 b\u1eaft bu\u1ed9c cho c\u00e1c m\u00f4-\u0111un quang m\u1edbi h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c tri\u1ec7u ch\u1ee9ng ph\u1ed5 bi\u1ebfn:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ph\u00e1t hi\u1ec7n kh\u00f4ng \u1ed5n \u0111\u1ecbnh<\/p><\/li>\n\n\n\n<li><p>C\u1ea3nh b\u00e1o m\u00f4-\u0111un kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 sau khi n\u00e2ng c\u1ea5p<\/p><\/li>\n\n\n\n<li><p>M\u00f4-\u0111un SFP t\u1eebng ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng nay ng\u1eebng ho\u1ea1t \u0111\u1ed9ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u1ea1i sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><br>T\u01b0\u01a1ng th\u00edch kh\u00f4ng ch\u1ec9 \u1edf m\u1ee9c v\u1eadt l\u00fd\u2014m\u00e0 c\u00f2n \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi ph\u1ea7n m\u1ec1m tr\u00ean c\u00e1c n\u1ec1n t\u1ea3ng m\u1ea1ng hi\u1ec7n \u0111\u1ea1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi thay th\u1ebf m\u00f4-\u0111un SFP, lu\u00f4n x\u00e1c th\u1ef1c:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed1c \u0111\u1ed9 v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch c\u1ed5ng<\/p><\/li>\n\n\n\n<li><p>Lo\u1ea1i s\u1ee3i quang (SMF so v\u1edbi MMF)<\/p><\/li>\n\n\n\n<li><p>Ph\u00f9 h\u1ee3p b\u01b0\u1edbc s\u00f3ng<\/p><\/li>\n\n\n\n<li><p>H\u1ea1n ch\u1ebf nh\u00e0 cung c\u1ea5p<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ed9 nguy\u00ean v\u1eb9n v\u00e0 c\u1ef1c t\u00ednh c\u1ee7a c\u00e1p<\/p><\/li>\n\n\n\n<li><p>Gi\u1edbi h\u1ea1n ng\u00e2n s\u00e1ch quang<\/p><\/li>\n\n\n\n<li><p>H\u1ed7 tr\u1ee3 ph\u1ea7n m\u1ec1m\u56fa\u4ef6 v\u00e0 ph\u1ea7n c\u1ee9ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 t\u01b0\u01a1ng th\u00edch s\u1ebd kh\u00f4i ph\u1ee5c \u0111\u1ea7y \u0111\u1ee7 ho\u1ea1t \u0111\u1ed9ng m\u00e0 kh\u00f4ng c\u1ea7n thay th\u1ebf m\u00f4-\u0111un SFP, t\u1eeb \u0111\u00f3 ti\u1ebft ki\u1ec7m c\u1ea3 th\u1eddi gian v\u00e0 chi ph\u00ed \u0111\u1ed3ng th\u1eddi c\u1ea3i thi\u1ec7n \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh l\u00e2u d\u00e0i c\u1ee7a m\u1ea1ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd37 Khi n\u00e0o n\u00ean thay th\u1ebf m\u00f4-\u0111un SFP, c\u00e1p ho\u1eb7c c\u1ed5ng switch<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Trong qu\u00e1 tr\u00ecnh ch\u1ea9n \u0111o\u00e1n s\u1ef1 c\u1ed1 SFP, m\u1ed9t trong nh\u1eefng quy\u1ebft \u0111\u1ecbnh quan tr\u1ecdng nh\u1ea5t l\u00e0 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c th\u00e0nh ph\u1ea7n n\u00e0o th\u1ef1c s\u1ef1 c\u1ea7n \u0111\u01b0\u1ee3c thay th\u1ebf. Vi\u1ec7c thay th\u1ebf m\u00f9 SFP th\u01b0\u1eddng g\u00e2y l\u00e3ng ph\u00ed th\u1eddi gian v\u00e0 ng\u00e2n s\u00e1ch v\u00ec nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 c\u00f3 th\u1ec3 n\u1eb1m \u1edf c\u00e1p s\u1ee3i quang ho\u1eb7c ch\u00ednh c\u1ed5ng switch. M\u1ed9t khu\u00f4n kh\u1ed5 ra quy\u1ebft \u0111\u1ecbnh c\u00f3 c\u1ea5u tr\u00fac gi\u00fap x\u00e1c \u0111\u1ecbnh th\u00e0nh ph\u1ea7n l\u1ed7i v\u1edbi \u0111\u1ed9 tin c\u1eady cao.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/11cdffbc58894392b1529719d304b491.jpg\" alt=\"When to Replace the SFP, Cable, or Switch Port\" class=\"wp-image-2773\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/11cdffbc58894392b1529719d304b491.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/11cdffbc58894392b1529719d304b491-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/11cdffbc58894392b1529719d304b491-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/11cdffbc58894392b1529719d304b491-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/11cdffbc58894392b1529719d304b491-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u25b6 Khi n\u00e0o n\u00ean thay th\u1ebf m\u00f4-\u0111un SFP<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Thay th\u1ebf m\u00f4-\u0111un SFP ch\u1ec9 sau khi x\u00e1c nh\u1eadn r\u1eb1ng \u0111\u00e2y l\u00e0 nguy\u00ean nh\u00e2n c\u00f3 kh\u1ea3 n\u0103ng cao nh\u1ea5t g\u00e2y l\u1ed7i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c d\u1ea5u hi\u1ec7u r\u00f5 r\u00e0ng cho th\u1ea5y SFP b\u1ecb l\u1ed7i:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f9ng m\u1ed9t m\u00f4-\u0111un SFP b\u1ecb l\u1ed7i tr\u00ean nhi\u1ec1u c\u00e1p \u0111\u00e3 bi\u1ebft l\u00e0 t\u1ed1t<\/p><\/li>\n\n\n\n<li><p>Ch\u1ea9n \u0111o\u00e1n quang h\u1ecdc cho th\u1ea5y c\u00f4ng su\u1ea5t ph\u00e1t (Tx) b\u1eb1ng kh\u00f4ng<\/p><\/li>\n\n\n\n<li><p>T\u00ecnh tr\u1ea1ng \u201ckh\u00f4ng k\u1ebft n\u1ed1i\u201d k\u00e9o d\u00e0i ngay c\u1ea3 sau khi c\u1eafm l\u1ea1i v\u00e0 l\u00e0m s\u1ea1ch<\/p><\/li>\n\n\n\n<li><p>K\u1ebft n\u1ed1i ho\u1ea1t \u0111\u1ed9ng ch\u1eadp ch\u1eddn tr\u00ean c\u00e1c c\u1ed5ng v\u00e0 s\u1ee3i quang kh\u00e1c nhau<\/p><\/li>\n\n\n\n<li><p>SFP qu\u00e1 n\u00f3ng ho\u1eb7c hi\u1ec3n th\u1ecb c\u00e1c gi\u00e1 tr\u1ecb \u0111i\u1ec7n \u00e1p\/nhi\u1ec7t \u0111\u1ed9 b\u1ea5t th\u01b0\u1eddng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ho\u00e1n \u0111\u1ed5i b\u1eb1ng m\u1ed9t m\u00f4-\u0111un SFP gi\u1ed1ng h\u1ec7t \u0111\u00e3 bi\u1ebft l\u00e0 t\u1ed1t<\/p><\/li>\n\n\n\n<li><p>N\u1ebfu s\u1ef1 c\u1ed1 bi\u1ebfn m\u1ea5t ngay l\u1eadp t\u1ee9c \u2192 m\u00f4-\u0111un g\u1ed1c b\u1ecb l\u1ed7i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t:<br><\/strong><br>L\u1ed7i ph\u1ea7n c\u1ee9ng SFP th\u1ef1c s\u1ef1 \u00edt ph\u1ed5 bi\u1ebfn h\u01a1n l\u1ed7i s\u1ee3i quang ho\u1eb7c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch, nh\u01b0ng tr\u1edf n\u00ean c\u00f3 kh\u1ea3 n\u0103ng cao khi s\u1ef1 c\u1ed1 \u0111i theo m\u00f4-\u0111un qua c\u00e1c m\u00f4i tr\u01b0\u1eddng kh\u00e1c nhau.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u25b6 Khi n\u00e0o c\u1ea7n thay c\u00e1p s\u1ee3i quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1p s\u1ee3i quang l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n \u1ea9n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y ra s\u1ef1 c\u1ed1 SFP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Thay c\u00e1p khi b\u1ea1n quan s\u00e1t th\u1ea5y:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ea5t c\u00f4ng su\u1ea5t thu (Rx) cao ho\u1eb7c kh\u00f4ng \u1ed5n \u0111\u1ecbnh<\/p><\/li>\n\n\n\n<li><p>H\u01b0 h\u1ecfng v\u1eadt l\u00fd r\u00f5 r\u00e0ng (g\u1ea5p, n\u1ee9t, v\u1ecf b\u1ecdc b\u1ecb d\u1eb9t)<\/p><\/li>\n\n\n\n<li><p>K\u1ebft n\u1ed1i ch\u1eadp ch\u1eddn khi di chuy\u1ec3n c\u00e1p<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ea7u n\u1ed1i b\u1ea9n ho\u1eb7c tr\u1ea7y x\u01b0\u1edbc kh\u00f4ng th\u1ec3 l\u00e0m s\u1ea1ch \u0111\u01b0\u1ee3c<\/p><\/li>\n\n\n\n<li><p>K\u1ebft n\u1ed1i ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng sau khi \u0111\u1ecbnh v\u1ecb l\u1ea1i c\u00e1p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Thay b\u1eb1ng c\u00e1p n\u1ed1i (patch cable) \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn v\u00e0 \u0111\u00e3 bi\u1ebft l\u00e0 t\u1ed1t<\/p><\/li>\n\n\n\n<li><p>N\u1ebfu k\u1ebft n\u1ed1i \u1ed5n \u0111\u1ecbnh \u2192 c\u00e1p s\u1ee3i quang ban \u0111\u1ea7u b\u1ecb l\u1ed7i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t:<br> <\/strong>H\u01b0 h\u1ecfng s\u1ee3i quang th\u01b0\u1eddng mang t\u00ednh c\u01a1 h\u1ecdc v\u00e0 ti\u1ebfn tri\u1ec3n, ngh\u0129a l\u00e0 hi\u1ec7u su\u1ea5t c\u00f3 th\u1ec3 suy gi\u1ea3m d\u1ea7n theo th\u1eddi gian tr\u01b0\u1edbc khi x\u1ea3y ra h\u1ecfng ho\u00e0n to\u00e0n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u25b6 Khi n\u00e0o c\u1ea7n thay c\u1ed5ng switch<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ecfng c\u1ed5ng switch \u00edt ph\u1ed5 bi\u1ebfn h\u01a1n nh\u01b0ng r\u1ea5t quan tr\u1ecdng ph\u1ea3i x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c d\u1ea5u hi\u1ec7u r\u00f5 r\u00e0ng c\u1ee7a l\u1ed7i c\u1ed5ng:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Nhi\u1ec1u thi\u1ebft b\u1ecb SFP \u0111\u00e3 bi\u1ebft l\u00e0 t\u1ed1t <a href=\"https:\/\/www.l-p.com\/store-25832-1-2-4g-transceiver-modules.htm\" target=\"_self\">SFP<br><\/a> \u0111\u1ec1u b\u1ecb l\u1ed7i t\u1ea1i c\u00f9ng m\u1ed9t c\u1ed5ng<\/p><\/li>\n\n\n\n<li><p>Nhi\u1ec1u c\u00e1p \u0111\u00e3 bi\u1ebft l\u00e0 t\u1ed1t c\u0169ng b\u1ecb l\u1ed7i<\/p><\/li>\n\n\n\n<li><p>SFP \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n \u0111\u00fang nh\u01b0ng k\u1ebft n\u1ed1i kh\u00f4ng bao gi\u1edd thi\u1ebft l\u1eadp \u0111\u01b0\u1ee3c<\/p><\/li>\n\n\n\n<li><p>C\u1ed5ng hi\u1ec3n th\u1ecb l\u1ed7i ph\u1ea7n c\u1ee9ng li\u00ean t\u1ee5c ho\u1eb7c t\u1ef1 v\u00f4 hi\u1ec7u h\u00f3a<\/p><\/li>\n\n\n\n<li><p>C\u00e1c c\u1ed5ng li\u1ec1n k\u1ec1 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng trong khi m\u1ed9t c\u1ed5ng nh\u1ea5t \u0111\u1ecbnh lu\u00f4n th\u1ea5t b\u1ea1i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Di chuy\u1ec3n SFP v\u00e0 s\u1ee3i quang sang m\u1ed9t c\u1ed5ng switch kh\u00e1c<\/p><\/li>\n\n\n\n<li><p>N\u1ebfu m\u1ecdi th\u1ee9 ho\u1ea1t \u0111\u1ed9ng \u2192 c\u1ed5ng ban \u0111\u1ea7u b\u1ecb l\u1ed7i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t:<br><\/strong><br>L\u1ed7i c\u1ed5ng switch th\u01b0\u1eddng do h\u01b0 h\u1ecfng ph\u1ea7n c\u1ee9ng, b\u1ee5i b\u1ea9n trong khung (cage), ho\u1eb7c l\u1ed7i giao di\u1ec7n truy\u1ec1n d\u1eabn n\u1ed9i b\u1ed9.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u25b6 Ma tr\u1eadn ra quy\u1ebft \u0111\u1ecbnh (H\u01b0\u1edbng d\u1eabn ch\u1ea9n \u0111o\u00e1n nhanh)<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>T\u00ecnh hu\u1ed1ng<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>L\u1ed7i c\u00f3 kh\u1ea3 n\u0103ng cao nh\u1ea5t<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>H\u00e0nh \u0111\u1ed9ng<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>V\u1ea5n \u0111\u1ec1 \u0111i theo SFP<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>m\u00f4-\u0111un SFP<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Thay SFP<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>V\u1ea5n \u0111\u1ec1 \u0111i theo c\u00e1p<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1p s\u1ee3i quang<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Thay c\u00e1p s\u1ee3i quang<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>V\u1ea5n \u0111\u1ec1 c\u1ed1 \u0111\u1ecbnh t\u1ea1i m\u1ed9t c\u1ed5ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u1ed5ng switch<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Thay th\u1ebf\/s\u1eeda ch\u1eefa c\u00f4ng t\u1eafc<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Ho\u1ea1t \u0111\u1ed9ng sau khi l\u00e0m s\u1ea1ch<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Nhi\u1ec5m b\u1ea9n<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/blog\/knowledge-center\/how-to-clean-fiber-optic-connectors.htm\">L\u00e0m s\u1ea1ch c\u00e1c \u0111\u1ea7u n\u1ed1i<\/a><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Ho\u1ea1t \u0111\u1ed9ng sau khi c\u1eafm l\u1ea1i \u0111\u00fang v\u1ecb tr\u00ed<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>V\u1ea5n \u0111\u1ec1 l\u1eafp \u0111\u1eb7t<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>S\u1eeda v\u1ecb tr\u00ed c\u1eafm\/k\u1ebft n\u1ed1i<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u25b6 L\u00fd lu\u1eadn g\u1ee1 l\u1ed7i th\u1ef1c t\u1ebf do k\u1ef9 s\u01b0 \u00e1p d\u1ee5ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c tri\u1ec3n khai th\u1ef1c t\u1ebf, k\u1ef9 s\u01b0 tu\u00e2n theo m\u1ed9t quy t\u1eafc c\u00f4 l\u1eadp \u0111\u01a1n gi\u1ea3n:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Thay \u0111\u1ed5i m\u1ed9t bi\u1ebfn t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m v\u00e0 quan s\u00e1t xem s\u1ef1 c\u1ed1 c\u00f3 \u0111i theo bi\u1ebfn \u0111\u00f3 hay kh\u00f4ng.<\/strong><\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ho\u00e1n \u0111\u1ed5i SFP \u2192 quan s\u00e1t<\/p><\/li>\n\n\n\n<li><p>Ho\u00e1n \u0111\u1ed5i c\u00e1p \u2192 quan s\u00e1t<\/p><\/li>\n\n\n\n<li><p>Ho\u00e1n \u0111\u1ed5i c\u1ed5ng \u2192 quan s\u00e1t<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do ph\u01b0\u01a1ng ph\u00e1p n\u00e0y hi\u1ec7u qu\u1ea3:<\/strong><br>S\u1ef1 c\u1ed1 SFP hi\u1ebfm khi x\u1ea3y ra ng\u1eabu nhi\u00ean. Ch\u00fang g\u1ea7n nh\u01b0 lu\u00f4n g\u1eafn v\u1edbi m\u1ed9t th\u00e0nh ph\u1ea7n v\u1eadt l\u00fd ho\u1eb7c logic c\u1ee5 th\u1ec3 trong li\u00ean k\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi thay th\u1ebf b\u1ea5t k\u1ef3 th\u00e0nh ph\u1ea7n n\u00e0o, h\u00e3y x\u00e1c \u0111\u1ecbnh xem s\u1ef1 c\u1ed1 c\u00f3 li\u00ean quan \u0111\u1ebfn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>The <strong>m\u00f4-\u0111un SFP<\/strong> (s\u1ef1 c\u1ed1 \u0111i theo m\u00f4-\u0111un)<\/p><\/li>\n\n\n\n<li><p>The <strong>c\u00e1p s\u1ee3i quang<\/strong> (s\u1ef1 c\u1ed1 \u0111i theo c\u00e1p)<\/p><\/li>\n\n\n\n<li><p>The <strong>c\u1ed5ng switch<\/strong> (s\u1ef1 c\u1ed1 v\u1eabn t\u1ed3n t\u1ea1i t\u1ea1i c\u1ed5ng \u0111\u00f3)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 c\u1ea5u tr\u00fac n\u00e0y lo\u1ea1i b\u1ecf vi\u1ec7c ph\u1ecfng \u0111o\u00e1n, gi\u1ea3m thi\u1ec3u vi\u1ec7c thay th\u1ebf kh\u00f4ng c\u1ea7n thi\u1ebft v\u00e0 \u0111\u1ea3m b\u1ea3o kh\u00f4i ph\u1ee5c k\u1ebft n\u1ed1i m\u1ea1ng nhanh h\u01a1n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd37 K\u1ebft lu\u1eadn \u2014 C\u00e1ch ch\u1ea9n \u0111o\u00e1n v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 SFP nhanh ch\u00f3ng<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 c\u1ed1 SFP c\u00f3 th\u1ec3 tr\u00f4ng ph\u1ee9c t\u1ea1p ban \u0111\u1ea7u, nh\u01b0ng trong h\u1ea7u h\u1ebft c\u00e1c tr\u01b0\u1eddng h\u1ee3p th\u1ef1c t\u1ebf, ch\u00fang tu\u00e2n theo m\u1ed9t m\u00f4 h\u00ecnh d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c: v\u1ea5n \u0111\u1ec1 \u1edf t\u1ea7ng v\u1eadt l\u00fd, kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1ec1 m\u1eb7t th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ho\u1eb7c suy hao t\u00edn hi\u1ec7u quang. B\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng c\u00e1ch ti\u1ebfp c\u1eadn g\u1ee1 l\u1ed7i c\u00f3 c\u1ea5u tr\u00fac\u2014b\u1eaft \u0111\u1ea7u t\u1eeb ki\u1ec3m tra v\u1eadt l\u00fd, ti\u1ebfp theo l\u00e0 x\u00e1c minh t\u00ednh t\u01b0\u01a1ng th\u00edch v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 ch\u1ea9n \u0111o\u00e1n t\u00edn hi\u1ec7u quang\u2014b\u1ea1n c\u00f3 th\u1ec3 nhanh ch\u00f3ng x\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n g\u1ed1c m\u00e0 kh\u00f4ng c\u1ea7n thay th\u1ebf m\u00f4-\u0111un m\u1ed9t c\u00e1ch kh\u00f4ng c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b7ca8e6b12c741a7b6a6f1daaebf41d6-1024x576.jpg\" alt=\"How to Quickly Diagnose and Fix Any SFP Issue\" class=\"wp-image-2774\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b7ca8e6b12c741a7b6a6f1daaebf41d6-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b7ca8e6b12c741a7b6a6f1daaebf41d6-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b7ca8e6b12c741a7b6a6f1daaebf41d6-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b7ca8e6b12c741a7b6a6f1daaebf41d6-18x10.jpg 18w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b7ca8e6b12c741a7b6a6f1daaebf41d6.jpg 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">T\u00f3m t\u1eaft Khung Ra Quy\u1ebft \u0110\u1ecbnh<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Khi \u0111\u1ed1i m\u1eb7t v\u1edbi s\u1ef1 c\u1ed1 SFP, h\u00e3y s\u1eed d\u1ee5ng l\u00fd lu\u1eadn k\u1ef9 thu\u1eadt \u0111\u01a1n gi\u1ea3n sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Kh\u00f4ng c\u00f3 \u0111\u00e8n li\u00ean k\u1ebft ho\u1eb7c kh\u00f4ng \u0111\u01b0\u1ee3c nh\u1eadn di\u1ec7n \u2192<\/strong> ki\u1ec3m tra v\u1ecb tr\u00ed c\u1eafm, t\u00ednh t\u01b0\u01a1ng th\u00edch ho\u1eb7c kh\u1ea3 n\u0103ng nh\u1eadn di\u1ec7n ph\u1ea7n c\u1ee9ng<\/p><\/li>\n\n\n\n<li><p><strong>Li\u00ean k\u1ebft ch\u1eadp ch\u1eddn \u2192<\/strong> ki\u1ec3m tra \u0111\u1ed9 s\u1ea1ch c\u1ee7a s\u1ee3i quang v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh t\u00edn hi\u1ec7u quang<\/p><\/li>\n\n\n\n<li><p><strong>C\u00f4ng su\u1ea5t quang th\u1ea5p \u2192<\/strong> ki\u1ec3m tra t\u1ed5n hao s\u1ee3i quang, kho\u1ea3ng c\u00e1ch v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ea7u n\u1ed1i<\/p><\/li>\n\n\n\n<li><p><strong>B\u1ed9 thu ph\u00e1t kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 \u2192<\/strong> x\u00e1c minh t\u00ednh t\u01b0\u01a1ng th\u00edch nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 c\u00e1c h\u1ea1n ch\u1ebf v\u1ec1 firmware<\/p><\/li>\n\n\n\n<li><p><strong>S\u1ef1 c\u1ed1 k\u00e9o d\u00e0i \u2192<\/strong> c\u00f4 l\u1eadp b\u1eb1ng c\u00e1ch ho\u00e1n \u0111\u1ed5i SFP, c\u00e1p v\u00e0 c\u1ed5ng switch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 c\u1ea5u tr\u00fac n\u00e0y gi\u00fap gi\u1ea3m th\u1eddi gian g\u1ee1 l\u1ed7i v\u00e0 \u0111\u1ea3m b\u1ea3o b\u1ea1n ch\u1ec9 thay th\u1ebf th\u00e0nh ph\u1ea7n th\u1ef1c s\u1ef1 b\u1ecb l\u1ed7i\u2014thay v\u00ec ph\u1ecfng \u0111o\u00e1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Khuy\u1ebfn ngh\u1ecb cu\u1ed1i c\u00f9ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i, \u0111\u1ed9 tin c\u1eady c\u1ee7a SFP ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1 h\u01a1n l\u00e0 ch\u1ec9 ri\u00eang module. Hi\u1ec7u n\u0103ng c\u1ee7a to\u00e0n b\u1ed9 \u0111\u01b0\u1eddng truy\u1ec1n\u2014ch\u1ea5t l\u01b0\u1ee3ng s\u1ee3i quang, ng\u00e2n s\u00e1ch quang h\u1ecdc, c\u00e1c quy t\u1eafc t\u01b0\u01a1ng th\u00edch v\u00e0 logic x\u00e1c th\u1ef1c c\u1ee7a switch\u2014\u0111\u1ec1u ph\u1ea3i \u0111\u1ed3ng b\u1ed9 v\u1edbi nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 tri\u1ec3n khai \u1ed5n \u0111\u1ecbnh, lu\u00f4n ch\u1ecdn c\u00e1c m\u00f4-\u0111un quang \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh v\u00e0 tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n c\u00f9ng c\u00e1c th\u00e0nh ph\u1ea7n s\u1ee3i quang ch\u1ea5t l\u01b0\u1ee3ng cao nh\u1eb1m gi\u1ea3m thi\u1ec3u th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng v\u00e0 chi ph\u00ed b\u1ea3o tr\u00ec d\u00e0i h\u1ea1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea1n \u0111ang t\u00ecm ngu\u1ed3n cung c\u1ea5p b\u1ed9 thu ph\u00e1t \u0111\u00e1ng tin c\u1eady v\u00e0 \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra \u0111\u1ea7y \u0111\u1ee7, h\u00e3y kh\u00e1m ph\u00e1 <a target=\"_self\" href=\"https:\/\/www.l-p.com\/\"><strong>C\u1eeda h\u00e0ng Ch\u00ednh th\u1ee9c LINK-PP<\/strong><\/a>, <a href=\"https:\/\/www.fs.com\/products\/12708.html\">b\u1ed9 s\u01b0u t\u1eadp transceiver c\u1ee7a FS.com<\/a>, n\u01a1i b\u1ea1n c\u00f3 th\u1ec3 t\u00ecm th\u1ea5y nhi\u1ec1u gi\u1ea3i ph\u00e1p SFP t\u01b0\u01a1ng th\u00edch nh\u1eb1m \u0111\u1ea3m b\u1ea3o t\u00ednh \u1ed5n \u0111\u1ecbnh v\u00e0 hi\u1ec7u n\u0103ng m\u1ea1ng \u1edf c\u1ea5p doanh nghi\u1ec7p.<\/p>","protected":false},"excerpt":{"rendered":"<p>H\u1ecdc c\u00e1ch s\u1eeda c\u00e1c v\u1ea5n \u0111\u1ec1 SFP nhanh ch\u00f3ng: kh\u00f4ng li\u00ean k\u1ebft s\u00e1ng, li\u00ean k\u1ebft dao \u0111\u1ed9ng, l\u1ed7i ph\u00e1t hi\u1ec7n, v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch v\u00e0 ki\u1ec3m tra c\u00f4ng su\u1ea5t quang.<\/p>","protected":false},"author":1,"featured_media":2775,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[26],"class_list":["post-2776","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2776","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/comments?post=2776"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2776\/revisions"}],"predecessor-version":[{"id":10721,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2776\/revisions\/10721"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/2775"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=2776"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=2776"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=2776"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}