{"id":7302,"date":"2026-05-15T00:00:00","date_gmt":"2026-05-15T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/sfp-link-meaning-troubleshooting-compatibility-guide\/"},"modified":"2026-06-22T03:22:56","modified_gmt":"2026-06-22T03:22:56","slug":"sfp-link-meaning-troubleshooting-compatibility-guide","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-link-meaning-troubleshooting-compatibility-guide","title":{"rendered":"Li\u00ean k\u1ebft SFP: H\u01b0\u1edbng d\u1eabn kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 v\u00e0 t\u01b0\u01a1ng th\u00edch"},"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\/cfa74b9ce04d43f08638ed1e74730df1.jpg\" alt=\"SFP Link: Troubleshooting and Compatibility Guide\" class=\"wp-image-7293\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cfa74b9ce04d43f08638ed1e74730df1.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cfa74b9ce04d43f08638ed1e74730df1-300x157.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cfa74b9ce04d43f08638ed1e74730df1-1024x536.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cfa74b9ce04d43f08638ed1e74730df1-768x402.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cfa74b9ce04d43f08638ed1e74730df1-18x9.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t li\u00ean k\u1ebft SFP l\u00e0 k\u1ebft n\u1ed1i m\u1ea1ng ch\u1ee7 \u0111\u1ed9ng \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp th\u00f4ng qua m\u1ed9t <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26155-1g-sfp.htm\">SFP<\/a> or <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26192-10g-sfp.htm\">SFP+ <\/a>b\u1ed9 thu ph\u00e1t gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 b\u1ed9 chuy\u1ec3n m\u1ea1ch, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn, m\u00e1y ch\u1ee7 ho\u1eb7c thi\u1ebft b\u1ecb m\u1ea1ng quang. N\u1ebfu li\u00ean k\u1ebft kh\u00f4ng th\u1ec3 thi\u1ebft l\u1eadp, nguy\u00ean nh\u00e2n th\u01b0\u1eddng kh\u00f4ng ph\u1ea3i do l\u1edbp m\u1ea1ng \u0111\u00f3 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/tcp-ip-model-network-communication-layers-and-data-exchange\/\">TCP\/IP<\/a> t\u1ef1 th\u00e2n, m\u00e0 do v\u1ea5n \u0111\u1ec1 \u1edf l\u1edbp th\u1ea5p h\u01a1n li\u00ean quan \u0111\u1ebfn t\u00ednh t\u01b0\u01a1ng th\u00edch quang h\u1ecdc, c\u1ef1c t\u00ednh s\u1ee3i quang, th\u01b0\u01a1ng l\u01b0\u1ee3ng t\u1ed1c \u0111\u1ed9, sai l\u1ec7ch b\u01b0\u1edbc s\u00f3ng ho\u1eb7c t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u v\u1eadt l\u00fd. Trong m\u00f4i tr\u01b0\u1eddng doanh nghi\u1ec7p v\u00e0 trung t\u00e2m d\u1eef li\u1ec7u, c\u00e1c li\u00ean k\u1ebft SFP \u1ed5n \u0111\u1ecbnh r\u1ea5t quan tr\u1ecdng v\u00ec ngay c\u1ea3 nh\u1eefng s\u1ef1 c\u1ed1 nh\u1ecf \u1edf l\u1edbp quang c\u0169ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-does-packet-loss-mean-for-your-internet-connection\/\">m\u1ea5t g\u00f3i<\/a>, <strong><s>L\u1ed7i CRC<\/s><\/strong>, dao \u0111\u1ed9ng li\u00ean k\u1ebft (link flapping), ho\u1eb7c gi\u00e1n \u0111o\u1ea1n d\u1ecbch v\u1ee5 ho\u00e0n to\u00e0n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi vi\u1ec7c tri\u1ec3n khai Ethernet t\u1ed1c \u0111\u1ed9 10G, 25G v\u00e0 cao h\u01a1n ti\u1ebfp t\u1ee5c m\u1edf r\u1ed9ng tr\u00ean c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y, <strong><s>m\u1ea1ng SMB<\/s><\/strong>, Ethernet c\u00f4ng nghi\u1ec7p v\u00e0 trung t\u00e2m d\u1eef li\u1ec7u AI, kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i d\u1ef1a tr\u00ean SFP v\u1eabn l\u00e0 m\u1ed9t trong nh\u1eefng c\u00f4ng ngh\u1ec7 giao ti\u1ebfp \u1edf l\u1edbp v\u1eadt l\u00fd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t. D\u00f9 s\u1eed d\u1ee5ng c\u00e1p s\u1ee3i quang \u0111a mode, s\u1ee3i quang \u0111\u01a1n mode, c\u00e1p DAC hay <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476770.htm\">b\u1ed9 thu ph\u00e1t \u0111\u1ed3ng tr\u1ee5c RJ45<\/a>, \u0111\u1ed9 tin c\u1eady c\u1ee7a li\u00ean k\u1ebft SFP tr\u1ef1c ti\u1ebfp \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 \u1ed5n \u0111\u1ecbnh b\u0103ng th\u00f4ng, t\u00ednh nh\u1ea5t qu\u00e1n \u0111\u1ed9 tr\u1ec5 v\u00e0 th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng t\u1ed5ng th\u1ec3 c\u1ee7a m\u1ea1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t l\u00fd do khi\u1ebfn c\u1ee5m t\u1eeb kh\u00f3a \u201cli\u00ean k\u1ebft SFP\u201d c\u00f3 nhu c\u1ea7u t\u00ecm ki\u1ebfm m\u1ea1nh l\u00e0 ng\u01b0\u1eddi d\u00f9ng th\u01b0\u1eddng \u0111ang c\u1ed1 g\u1eafng gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 th\u1ef1c ti\u1ec5n r\u1ea5t c\u1ee5 th\u1ec3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ea1i sao \u0111\u00e8n b\u00e1o li\u00ean k\u1ebft SFP l\u1ea1i t\u1eaft?<\/p><\/li><li><p>T\u1ea1i sao c\u1ed5ng SFP hi\u1ec3n th\u1ecb tr\u1ea1ng th\u00e1i \u201cdown\u201d ngay c\u1ea3 khi c\u00e1p \u0111\u00e3 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i?<\/p><\/li><li><p>C\u00e1c m\u00f4-\u0111un SFP c\u1ee7a c\u00e1c h\u00e3ng kh\u00e1c nhau c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau \u0111\u01b0\u1ee3c kh\u00f4ng?<\/p><\/li><li><p>T\u1ea1i sao li\u00ean k\u1ebft c\u1ee9 li\u00ean t\u1ee5c dao \u0111\u1ed9ng (flapping) m\u1ed9t c\u00e1ch ng\u1eaft qu\u00e3ng?<\/p><\/li><li><p>T\u00f4i n\u00ean s\u1eed d\u1ee5ng m\u00f4-\u0111un SFP quang, DAC hay RJ45?<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y kh\u00f4ng ch\u1ec9 l\u00e0 nh\u1eefng c\u00e2u h\u1ecfi d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u. Ngay c\u1ea3 c\u00e1c k\u1ef9 s\u01b0 m\u1ea1ng gi\u00e0u kinh nghi\u1ec7m c\u0169ng th\u01b0\u1eddng xuy\u00ean g\u1eb7p ph\u1ea3i c\u00e1c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch do quang h\u1ecdc \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a theo nh\u00e0 s\u1ea3n xu\u1ea5t, s\u1ef1 kh\u00f4ng nh\u1ea5t qu\u00e1n c\u1ee7a Gi\u00e1m s\u00e1t Quang h\u1ecdc K\u1ef9 thu\u1eadt s\u1ed1 (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/ddm-dom-in-optical-transceivers\/\">DOM<\/a>) , s\u1ef1 kh\u00f4ng kh\u1edbp c\u1ee7a S\u1eeda l\u1ed7i Ti\u1ebfn tr\u01b0\u1edbc (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/fec-forward-error-correction-in-optical-communication\/\">FEC<\/a>) ho\u1eb7c ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t quang kh\u00f4ng ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u01b0\u1edbng d\u1eabn n\u00e0y gi\u1ea3i th\u00edch \u00fd ngh\u0129a c\u1ee7a m\u1ed9t li\u00ean k\u1ebft SFP, c\u00e1ch thi\u1ebft l\u1eadp c\u00e1c li\u00ean k\u1ebft SFP, c\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t khi\u1ebfn li\u00ean k\u1ebft th\u1ea5t b\u1ea1i v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 m\u1ed9t c\u00e1ch h\u1ec7 th\u1ed1ng trong c\u00e1c m\u00f4i tr\u01b0\u1eddng s\u1ea3n xu\u1ea5t th\u1ef1c t\u1ebf. T\u00e0i li\u1ec7u c\u0169ng so s\u00e1nh c\u00e1c tri\u1ec3n khai SFP d\u1ef1a tr\u00ean s\u1ee3i quang, DAC v\u00e0 \u0111\u1ed3ng tr\u1ee5c \u0111\u1ec3 gi\u00fap c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf m\u1ea1ng l\u1ef1a ch\u1ecdn gi\u1ea3i ph\u00e1p \u0111\u00e1ng tin c\u1eady nh\u1ea5t cho t\u1eebng t\u00ecnh hu\u1ed1ng \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch \u0111\u1ecdc b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n s\u1ebd t\u00ecm hi\u1ec3u \u0111\u01b0\u1ee3c:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft SFP l\u00e0 g\u00ec \u1edf l\u1edbp v\u1eadt l\u00fd v\u00e0 l\u1edbp giao th\u1ee9c<\/p><\/li><li><p>V\u00ec sao li\u00ean k\u1ebft SFP l\u1ea1i th\u1ea5t b\u1ea1i ngay c\u1ea3 khi ph\u1ea7n c\u1ee9ng d\u01b0\u1eddng nh\u01b0 \u0111\u00e3 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i<\/p><\/li><li><p>C\u00e1ch kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 li\u00ean k\u1ebft SFP t\u1eebng b\u01b0\u1edbc m\u1ed9t<\/p><\/li><li><p>C\u00e1ch t\u00ednh t\u01b0\u01a1ng th\u00edch v\u00e0 m\u00e3 h\u00f3a theo nh\u00e0 s\u1ea3n xu\u1ea5t \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/interoperability-in-networking-meaning-standards-connectivity\/\">kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c<\/a><\/p><\/li><li><p>C\u00e1ch gi\u1ea3m thi\u1ec3u hi\u1ec7n t\u01b0\u1ee3ng dao \u0111\u1ed9ng li\u00ean k\u1ebft (link flapping), m\u1ea5t g\u00f3i v\u00e0 l\u1ed7i CRC\/FCS<\/p><\/li><li><p>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t \u0111\u1ec3 l\u1ef1a ch\u1ecdn <a target=\"\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">SFP c\u1ee7a b\u00ean th\u1ee9 ba<\/a> \u1ed5n \u0111\u1ecbnh cho m\u1ea1ng doanh nghi\u1ec7p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi \u0111\u1ed9c gi\u1ea3 tri\u1ec3n khai c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng quang quy m\u00f4 l\u1edbn, b\u00e0i vi\u1ebft n\u00e0y c\u00f2n tham kh\u1ea3o c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh nh\u01b0 <a target=\"_blank\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/ieee-802-3-ethernet-standard-explained\/\">IEEE 802.3<\/a> v\u00e0 kinh nghi\u1ec7m th\u1ef1c t\u1ebf t\u1eeb c\u00e1c tri\u1ec3n khai chuy\u1ec3n m\u1ea1ch doanh nghi\u1ec7p, \u0111\u01b0\u1eddng l\u00ean quang (fiber uplinks) v\u00e0 k\u1ebft n\u1ed1i gi\u1eefa c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u (data center interconnect).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udfe0 Li\u00ean k\u1ebft SFP l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t li\u00ean k\u1ebft SFP l\u00e0 \u0111\u01b0\u1eddng truy\u1ec1n th\u00f4ng ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c t\u1ea1o ra khi hai thi\u1ebft b\u1ecb m\u1ea1ng thi\u1ebft l\u1eadp th\u00e0nh c\u00f4ng k\u1ebft n\u1ed1i \u1edf l\u1edbp v\u1eadt l\u00fd th\u00f4ng qua c\u00e1c b\u1ed9 thu ph\u00e1t SFP ho\u1eb7c SFP+. Li\u00ean k\u1ebft ch\u1ec9 tr\u1edf n\u00ean ho\u1ea1t \u0111\u1ed9ng khi c\u1ea3 hai ph\u00eda \u0111\u1ea1t \u0111\u01b0\u1ee3c th\u1ecfa thu\u1eadn v\u1ec1 c\u00e1c th\u00f4ng s\u1ed1 nh\u01b0 t\u1ed1c \u0111\u1ed9, b\u01b0\u1edbc s\u00f3ng, ph\u01b0\u01a1ng ph\u00e1p m\u00e3 h\u00f3a v\u00e0 t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u. Trong c\u00e1c m\u1ea1ng Ethernet, li\u00ean k\u1ebft SFP \u0111\u00f3ng vai tr\u00f2 l\u00e0 l\u1edbp v\u1eadn chuy\u1ec3n v\u1eadt l\u00fd mang d\u1eef li\u1ec7u gi\u1eefa c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn, m\u00e1y ch\u1ee7, h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef ho\u1eb7c thi\u1ebft b\u1ecb truy\u1ec1n d\u1eabn quang.<\/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\/6bb0332c328b42069712a0da75cb20f0.jpg\" alt=\"What Is an SFP Link?\" class=\"wp-image-7294\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6bb0332c328b42069712a0da75cb20f0.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6bb0332c328b42069712a0da75cb20f0-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6bb0332c328b42069712a0da75cb20f0-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6bb0332c328b42069712a0da75cb20f0-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6bb0332c328b42069712a0da75cb20f0-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >Hi\u1ec3u r\u00f5 \u00fd ngh\u0129a c\u1ee7a m\u1ed9t li\u00ean k\u1ebft SFP<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">SFP l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a <a target=\"_self\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-small-form-factor-pluggable-transceiver-guide\/\">Typical Medium<\/a>, m\u1ed9t <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/478230.htm\">b\u1ed9 thu ph\u00e1t c\u00f3 th\u1ec3 thay th\u1ebf n\u00f3ng<\/a> ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong m\u1ea1ng doanh nghi\u1ec7p v\u00e0 trung t\u00e2m d\u1eef li\u1ec7u. B\u1ea3n th\u00e2n m\u00f4-\u0111un SFP kh\u00f4ng ph\u1ea3i l\u00e0 \u201cli\u00ean k\u1ebft\u201d. Thay v\u00e0o \u0111\u00f3, n\u00f3 h\u1ed7 tr\u1ee3 vi\u1ec7c thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i b\u1eb1ng c\u00e1ch chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u \u0111i\u1ec7n th\u00e0nh t\u00edn hi\u1ec7u quang ho\u1eb7c \u0111\u1ed3ng tr\u1ee5c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>The <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/488468.htm\">m\u00f4-\u0111un SFP<\/a> l\u00e0 ph\u1ea7n c\u1ee9ng, c\u00f2n li\u00ean k\u1ebft SFP l\u00e0 k\u1ebft n\u1ed1i \u0111ang ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c t\u1ea1o ra th\u00f4ng qua n\u00f3.<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t li\u00ean k\u1ebft SFP \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Hai m\u00f4-\u0111un SFP\/SFP+ t\u01b0\u01a1ng th\u00edch<\/p><\/li><li><p>S\u1ee3i quang, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/direct-attach-cables-dac-in-networking\/\">SFF-8472<\/a>, ho\u1eb7c c\u00e1p \u0111\u1ed3ng tr\u1ee5c<\/p><\/li><li><p>C\u1ea5u h\u00ecnh c\u1ed5ng ph\u00f9 h\u1ee3p<\/p><\/li><li><p>\u0110\u1ed3ng b\u1ed9 t\u00edn hi\u1ec7u \u1ed5n \u0111\u1ecbnh<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea5t k\u1ef3 y\u1ebfu t\u1ed1 n\u00e0o trong s\u1ed1 n\u00e0y th\u1ea5t b\u1ea1i, li\u00ean k\u1ebft c\u00f3 th\u1ec3 duy tr\u00ec tr\u1ea1ng th\u00e1i \u201cdown\u201d ho\u1eb7c tr\u1edf n\u00ean kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1ch thi\u1ebft l\u1eadp m\u1ed9t li\u00ean k\u1ebft SFP<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Khi ch\u00e8n m\u1ed9t m\u00f4-\u0111un SFP, b\u1ed9 chuy\u1ec3n m\u1ea1ch ho\u1eb7c b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn s\u1ebd \u0111\u1ecdc th\u00f4ng tin m\u00f4-\u0111un v\u00e0 ki\u1ec3m tra t\u00ednh t\u01b0\u01a1ng th\u00edch. Sau khi c\u00e1p \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i, c\u1ea3 hai thi\u1ebft b\u1ecb b\u1eaft \u0111\u1ea7u qu\u00e1 tr\u00ecnh th\u01b0\u01a1ng l\u01b0\u1ee3ng \u1edf l\u1edbp v\u1eadt l\u00fd, bao g\u1ed3m ph\u00e1t hi\u1ec7n t\u00edn hi\u1ec7u, kh\u1edbp t\u1ed1c \u0111\u1ed9 v\u00e0 \u0111\u1ed3ng b\u1ed9 h\u00f3a.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e8n b\u00e1o li\u00ean k\u1ebft ch\u1ec9 s\u00e1ng l\u00ean sau khi k\u1ebft n\u1ed1i \u0111\u00e3 \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 296px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"296\"><p>B\u01b0\u1edbc<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Quy tr\u00ecnh<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"296\"><p>1<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ph\u00e1t hi\u1ec7n m\u00f4-\u0111un SFP<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"296\"><p>2<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>X\u00e1c minh <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/how-to-test-sfp-compatibility\/\">t\u01b0\u01a1ng th\u00edch<\/a><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"296\"><p>3<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>K\u1ebft n\u1ed1i c\u00e1p\/s\u1ee3i quang<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"296\"><p>4<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed3ng b\u1ed9 h\u00f3a t\u00edn hi\u1ec7u<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"296\"><p>5<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Thi\u1ebft l\u1eadp li\u00ean k\u1ebft<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c lo\u1ea1i li\u00ean k\u1ebft SFP ph\u1ed5 bi\u1ebfn<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" >Li\u00ean k\u1ebft SFP quang h\u1ecdc<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng cho truy\u1ec1n d\u1eabn kho\u1ea3ng c\u00e1ch xa v\u00e0 t\u1ed1c \u0111\u1ed9 cao th\u00f4ng qua s\u1ee3i quang \u0111a mode ho\u1eb7c \u0111\u01a1n mode. C\u00e1c ti\u00eau chu\u1ea9n ph\u1ed5 bi\u1ebfn bao g\u1ed3m <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475415.htm\">10GBASE-SR<\/a> and <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475586.htm\">10GBASE-LR<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Li\u00ean k\u1ebft s\u1ee3i quang cung c\u1ea5p:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn xa h\u01a1n<\/p><\/li><li><p>T\u1ed1t h\u01a1n <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-electromagnetic-interference\/\">EMI <\/a>kh\u1ea3 n\u0103ng ch\u1ed1ng nhi\u1ec5u<\/p><\/li><li><p>\u0110\u1ed9 tr\u1ec5 th\u1ea5p h\u01a1n<\/p><\/li><li><p>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng b\u0103ng th\u00f4ng cao h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >Li\u00ean k\u1ebft SFP DAC<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c c\u00e1p \u0110\u1ed3ng tr\u1ee5c G\u1eafn tr\u1ef1c ti\u1ebfp (DAC) th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c k\u1ebft n\u1ed1i ng\u1eafn t\u1eeb m\u00e1y ch\u1ee7 \u0111\u1ebfn b\u1ed9 chuy\u1ec3n m\u1ea1ch b\u00ean trong t\u1ee7 rack.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c t\u00ecnh hu\u1ed1ng tri\u1ec3n khai ph\u1ed5 bi\u1ebfn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-a-tor-top-of-rack-switch\/\">Tr\u00ean c\u00f9ng m\u1ed9t rack<\/a> (ToR) chuy\u1ec3n m\u1ea1ch<\/p><\/li><li><p>K\u1ebft n\u1ed1i gi\u1eefa m\u00e1y ch\u1ee7 v\u00e0 b\u1ed9 chuy\u1ec3n m\u1ea1ch<\/p><\/li><li><p>C\u00e1c li\u00ean k\u1ebft 10G\/25G kho\u1ea3ng c\u00e1ch ng\u1eafn<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >Li\u00ean k\u1ebft SFP \u0111\u1ed3ng tr\u1ee5c RJ45<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un n\u00e0y cho ph\u00e9p Ethernet ch\u1ea1y tr\u00ean <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/cat5e-vs-cat6-vs-cat6a-for-copper-sfp\/\">c\u00e1p \u0111\u1ed3ng tr\u1ee5c Cat5e\/Cat6<\/a> , nh\u01b0ng ch\u00fang th\u01b0\u1eddng sinh nhi\u1ec7t nhi\u1ec1u h\u01a1n v\u00e0 g\u00e2y ra c\u00e1c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch nhi\u1ec1u h\u01a1n so v\u1edbi quang h\u1ecdc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c li\u00ean k\u1ebft n\u00e0y h\u1ea5p d\u1eabn v\u00ec ch\u00fang:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u00e1i s\u1eed d\u1ee5ng h\u1ea1 t\u1ea7ng \u0111\u1ed3ng hi\u1ec7n t\u1ea1i<\/p><\/li><li><p>\u0110\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c tri\u1ec3n khai cho m\u1ea1ng SMB<\/p><\/li><li><p>Gi\u1ea3m chi ph\u00ed l\u1eafp \u0111\u1eb7t s\u1ee3i quang<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >Li\u00ean k\u1ebft SFP so v\u1edbi Li\u00ean k\u1ebft Ethernet: S\u1ef1 kh\u00e1c bi\u1ec7t l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t li\u00ean k\u1ebft Ethernet m\u00f4 t\u1ea3 k\u1ebft n\u1ed1i m\u1ea1ng logic gi\u1eefa hai thi\u1ebft b\u1ecb.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t li\u00ean k\u1ebft SFP \u0111\u1eb7c bi\u1ec7t \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u01a1 ch\u1ebf v\u1eadn chuy\u1ec3n d\u1ef1a tr\u00ean b\u1ed9 thu ph\u00e1t \u1edf l\u1edbp v\u1eadt l\u00fd, ch\u1ecbu tr\u00e1ch nhi\u1ec7m mang c\u00e1c khung Ethernet.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e3y h\u00ecnh dung theo c\u00e1ch sau:<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 290px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"290\"><p>Thu\u1eadt ng\u1eef<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>\u00dd ngh\u0129a<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"290\"><p>Li\u00ean k\u1ebft Ethernet<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Truy\u1ec1n th\u00f4ng m\u1ea1ng logic<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"290\"><p>Li\u00ean k\u1ebft SFP<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u01b0\u1eddng d\u1eabn v\u1eadn chuy\u1ec3n quang\/hi\u1ec7n \u0111i\u1ec7n v\u1eadt l\u00fd<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu kh\u00f4ng c\u00f3 li\u00ean k\u1ebft SFP \u1ed5n \u0111\u1ecbnh, l\u1edbp Ethernet s\u1ebd kh\u00f4ng th\u1ec3 truy\u1ec1n g\u00f3i tin m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Nguy\u00ean nh\u00e2n th\u01b0\u1eddng g\u1eb7p n\u00e0o g\u00e2y ra s\u1ef1 c\u1ed1 li\u00ean k\u1ebft SFP?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ea7u h\u1ebft c\u00e1c s\u1ef1 c\u1ed1 li\u00ean k\u1ebft SFP li\u00ean quan \u0111\u1ebfn t\u1ea7ng v\u1eadt l\u00fd.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u00f4-\u0111un SFP kh\u00f4ng t\u01b0\u01a1ng th\u00edch<\/p><\/li><li><p>\u0110\u1ed9 ph\u00e2n c\u1ef1c s\u1ee3i quang kh\u00f4ng \u0111\u00fang<\/p><\/li><li><p>Kh\u00f4ng kh\u1edbp t\u1ed1c \u0111\u1ed9 ho\u1eb7c FEC<\/p><\/li><li><p>\u0110\u1ea7u n\u1ed1i LC b\u1ecb b\u1ea9n<\/p><\/li><li><p>M\u00e3 h\u00f3a nh\u00e0 cung c\u1ea5p kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li><li><p>T\u1ed5n hao c\u00f4ng su\u1ea5t quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 khi m\u00f4-\u0111un \u0111\u01b0\u1ee3c c\u1eafm \u0111\u00fang c\u00e1ch, li\u00ean k\u1ebft v\u1eabn c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i n\u1ebfu c\u00e1c \u0111i\u1ec1u ki\u1ec7n n\u00e0y kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u00e1p \u1ee9ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n ghi nh\u1edb<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft SFP l\u00e0 k\u1ebft n\u1ed1i v\u1eadt l\u00fd \u0111\u01b0\u1ee3c t\u1ea1o ra th\u00f4ng qua b\u1ed9 thu ph\u00e1t SFP.<\/p><\/li><li><p>Li\u00ean k\u1ebft ph\u1ee5 thu\u1ed9c v\u00e0o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch, ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u v\u00e0 vi\u1ec7c th\u01b0\u01a1ng l\u01b0\u1ee3ng ch\u00ednh x\u00e1c.<\/p><\/li><li><p>C\u00e1c li\u00ean k\u1ebft SFP s\u1eed d\u1ee5ng s\u1ee3i quang, DAC v\u00e0 RJ45 c\u00f3 c\u00e1c k\u1ecbch b\u1ea3n tri\u1ec3n khai kh\u00e1c nhau.<\/p><\/li><li><p>Ph\u1ea7n l\u1edbn s\u1ef1 c\u1ed1 li\u00ean k\u1ebft SFP b\u1eaft ngu\u1ed3n t\u1eeb c\u00e1c v\u1ea5n \u0111\u1ec1 \u1edf t\u1ea7ng v\u1eadt l\u00fd ch\u1ee9 kh\u00f4ng ph\u1ea3i do ph\u1ea7n m\u1ec1m.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udfe0 T\u1ea1i sao li\u00ean k\u1ebft SFP c\u1ee7a t\u00f4i kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu li\u00ean k\u1ebft SFP kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng, nguy\u00ean nh\u00e2n th\u01b0\u1eddng l\u00e0 do c\u00e1c v\u1ea5n \u0111\u1ec1 \u1edf t\u1ea7ng v\u1eadt l\u00fd ch\u1ee9 kh\u00f4ng ph\u1ea3i do c\u1ea5u h\u00ecnh IP ho\u1eb7c \u0111\u1ecbnh tuy\u1ebfn. C\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t bao g\u1ed3m: m\u00f4-\u0111un SFP kh\u00f4ng t\u01b0\u01a1ng th\u00edch, \u0111\u1ed9 ph\u00e2n c\u1ef1c s\u1ee3i quang kh\u00f4ng \u0111\u00fang, kh\u00f4ng kh\u1edbp t\u1ed1c \u0111\u1ed9, thi\u1ebft l\u1eadp FEC kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3, \u0111\u1ea7u n\u1ed1i b\u1ecb b\u1ea9n ho\u1eb7c c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u quang kh\u00f4ng \u0111\u1ee7. Trong m\u1ea1ng doanh nghi\u1ec7p, vi\u1ec7c x\u00e1c minh t\u00ednh t\u01b0\u01a1ng th\u00edch v\u00e0 \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u th\u01b0\u1eddng l\u00e0 c\u00e1ch nhanh nh\u1ea5t \u0111\u1ec3 kh\u00f4i ph\u1ee5c li\u00ean k\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\/f07289a29f2f460daabb31e2e21d0467.jpg\" alt=\"Why Is My SFP Link Not Coming Up?\" class=\"wp-image-7295\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f07289a29f2f460daabb31e2e21d0467.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f07289a29f2f460daabb31e2e21d0467-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f07289a29f2f460daabb31e2e21d0467-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f07289a29f2f460daabb31e2e21d0467-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f07289a29f2f460daabb31e2e21d0467-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t khi\u1ebfn li\u00ean k\u1ebft SFP kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Khi \u0111\u00e8n LED c\u1ed5ng SFP t\u1eaft ho\u1eb7c giao di\u1ec7n hi\u1ec3n th\u1ecb \u201cLi\u00ean k\u1ebft xu\u1ed1ng\u201d, h\u00e3y b\u1eaft \u0111\u1ea7u ki\u1ec3m tra nh\u1eefng nguy\u00ean nh\u00e2n c\u00f3 kh\u1ea3 n\u0103ng cao nh\u1ea5t tr\u01b0\u1edbc ti\u00ean.<\/p>\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;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>V\u1ea5n \u0111\u1ec1<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>K\u1ebft qu\u1ea3 \u0111i\u1ec3n h\u00ecnh<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>M\u00f4-\u0111un SFP kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u1ed5ng b\u1ecb v\u00f4 hi\u1ec7u h\u00f3a<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed9 ph\u00e2n c\u1ef1c TX\/RX c\u1ee7a s\u1ee3i quang sai<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u quang<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Kh\u00f4ng kh\u1edbp t\u1ed1c \u0111\u1ed9<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>S\u1ef1 c\u1ed1 li\u00ean k\u1ebft<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ea7u n\u1ed1i LC b\u1ecb b\u1ea9n<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>L\u1ed7i CRC\/FCS<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Kh\u00f4ng kh\u1edbp FEC<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Nh\u1ea5p nh\u00e1y li\u00ean k\u1ebft<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>C\u1eb7p b\u01b0\u1edbc s\u00f3ng sai<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Kh\u00f4ng \u0111\u1ed3ng b\u1ed9<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1p s\u1ee3i quang b\u1ecb h\u1ecfng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>K\u1ebft n\u1ed1i ch\u1eadp ch\u1eddn<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Trong tri\u1ec3n khai th\u1ef1c t\u1ebf, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 t\u01b0\u01a1ng th\u00edch v\u00e0 sai s\u00f3t v\u1ec1 \u0111\u1ed9 ph\u00e2n c\u1ef1c s\u1ee3i quang l\u00e0 nh\u1eefng s\u1ef1 c\u1ed1 ph\u1ed5 bi\u1ebfn nh\u1ea5t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >M\u00f4-\u0111un SFP kh\u00f4ng t\u01b0\u01a1ng th\u00edch<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec1u b\u1ed9 chuy\u1ec3n m\u1ea1ch v\u00e0 b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn ki\u1ec3m tra <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/eeprom-electrically-erasable-programmable-read-only-memory\/\">B\u1ed9 nh\u1edb EEPROM<\/a> th\u00f4ng tin b\u00ean trong m\u00f4-\u0111un SFP. N\u1ebfu m\u00f4-\u0111un kh\u00f4ng \u0111\u01b0\u1ee3c nh\u00e0 cung c\u1ea5p ph\u00ea duy\u1ec7t ho\u1eb7c m\u00e3 h\u00f3a kh\u00f4ng \u0111\u00fang, c\u1ed5ng c\u00f3 th\u1ec3 t\u1eeb ch\u1ed1i thi\u1ebft l\u1eadp li\u00ean k\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u1ed9 quang h\u1ecdc m\u00e3 h\u00f3a Cisco tr\u00ean b\u1ed9 chuy\u1ec3n m\u1ea1ch kh\u00f4ng ph\u1ea3i Cisco<\/p><\/li><li><p>M\u00f4-\u0111un SFP RJ45 kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li><li><p>L\u1eabn l\u1ed9n sai gi\u1eefa b\u1ed9 quang h\u1ecdc 1G v\u00e0 10G<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb cho ph\u00e9p s\u1eed d\u1ee5ng b\u1ed9 quang h\u1ecdc c\u1ee7a b\u00ean th\u1ee9 ba, trong khi c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c \u00e1p d\u1ee5ng ch\u00ednh s\u00e1ch t\u01b0\u01a1ng th\u00edch nghi\u00eam ng\u1eb7t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ecbnh ngh\u0129a vi m\u00f4: EEPROM l\u00e0 chip b\u1ed9 nh\u1edb b\u00ean trong m\u00f4-\u0111un SFP l\u01b0u tr\u1eef th\u00f4ng tin nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 kh\u1ea3 n\u0103ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ed9 ph\u00e2n c\u1ef1c s\u1ee3i quang kh\u00f4ng \u0111\u00fang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Li\u00ean k\u1ebft s\u1ee3i quang y\u00eau c\u1ea7u c\u0103n ch\u1ec9nh \u0111\u00fang chi\u1ec1u TX sang RX.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu s\u1ee3i truy\u1ec1n v\u00e0 s\u1ee3i nh\u1eadn b\u1ecb \u0111\u1ea3o ng\u01b0\u1ee3c:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t quang kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n<\/p><\/li><li><p>Li\u00ean k\u1ebft v\u1eabn \u1edf tr\u1ea1ng th\u00e1i t\u1eaft (down)<\/p><\/li><li><p>Kh\u00f4ng x\u1ea3y ra \u0111\u1ed3ng b\u1ed9 h\u00f3a<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng l\u1ed7i l\u1eafp \u0111\u1eb7t ph\u1ed5 bi\u1ebfn nh\u1ea5t trong tri\u1ec3n khai s\u1ee3i quang LC duplex.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Kh\u00f4ng kh\u1edbp t\u1ed1c \u0111\u1ed9 ho\u1eb7c FEC<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ea3 hai thi\u1ebft b\u1ecb \u0111\u1ec1u ph\u1ea3i h\u1ed7 tr\u1ee3 c\u00f9ng t\u1ed1c \u0111\u1ed9 li\u00ean k\u1ebft v\u00e0 ch\u1ebf \u0111\u1ed9 S\u1eeda l\u1ed7i ti\u1ebfn tr\u01b0\u1edbc (Forward Error Correction \u2013 FEC).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u1ed5ng 10G k\u1ebft n\u1ed1i v\u1edbi b\u1ed9 quang h\u1ecdc 1G<\/p><\/li><li><p>M\u1ed9t ph\u00eda s\u1eed d\u1ee5ng RS-FEC trong khi ph\u00eda kia t\u1eaft FEC<\/p><\/li><li><p>C\u00e1c b\u1ea5t th\u01b0\u1eddng trong t\u1ef1 th\u01b0\u01a1ng l\u01b0\u1ee3ng (auto-negotiation)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c li\u00ean k\u1ebft Ethernet t\u1ed1c \u0111\u1ed9 cao nh\u01b0 25G v\u00e0 100G \u0111\u1eb7c bi\u1ec7t nh\u1ea1y c\u1ea3m v\u1edbi c\u1ea5u h\u00ecnh FEC.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ea7u n\u1ed1i b\u1ea9n ho\u1eb7c b\u1ecb h\u01b0 h\u1ecfng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 b\u1ee5i vi m\u00f4 tr\u00ean \u0111\u1ea7u n\u1ed1i LC c\u0169ng c\u00f3 th\u1ec3 l\u00e0m suy y\u1ebfu \u0111\u00e1ng k\u1ec3 t\u00edn hi\u1ec7u quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c tri\u1ec7u ch\u1ee9ng ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ea5t \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft<\/p><\/li><li><p>L\u1ed7i CRC\/FCS<\/p><\/li><li><p>M\u1ea5t g\u00f3i d\u1eef li\u1ec7u ng\u1eaft qu\u00e3ng<\/p><\/li><li><p>Li\u00ean k\u1ebft ch\u1eadp ch\u1eddn ng\u1eabu nhi\u00ean<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Lu\u00f4n lu\u00f4n <a target=\"_blank\" href=\"https:\/\/www.l-p.com\/blog\/how-to-clean-fiber-optic-connectors.htm\">l\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i s\u1ee3i quang<\/a> tr\u01b0\u1edbc khi c\u1eafm v\u00e0o<\/p><\/li><li><p>S\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 ki\u1ec3m tra s\u1ee3i quang khi c\u00f3 th\u1ec3<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >V\u1ea5n \u0111\u1ec1 c\u00f4ng su\u1ea5t quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed7i li\u00ean k\u1ebft s\u1ee3i quang \u0111\u1ec1u c\u00f3 ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t quang <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/power-budget-importance-calculation-management-for-devices\/\">ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t quang<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu t\u1ed5n hao t\u00edn hi\u1ec7u tr\u1edf n\u00ean qu\u00e1 cao do:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn d\u00e0i<\/p><\/li><li><p>Qu\u00e1 nhi\u1ec1u b\u1ea3ng \u0111\u1ea5u n\u1ed1i (patch panels)<\/p><\/li><li><p>H\u00e0n n\u1ed1i k\u00e9m ch\u1ea5t l\u01b0\u1ee3ng<\/p><\/li><li><p>C\u00e1p s\u1ee3i quang b\u1ecb cong<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u2026b\u1ed9 thu c\u00f3 th\u1ec3 kh\u00f4ng ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ecnh hu\u1ed1ng n\u00e0y \u0111\u1eb7c bi\u1ec7t ph\u1ed5 bi\u1ebfn trong c\u00e1c tri\u1ec3n khai s\u1ee3i \u0111\u01a1n mode t\u1ea7m xa.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Danh s\u00e1ch ki\u1ec3m tra kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 nhanh<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi thay th\u1ebf ph\u1ea7n c\u1ee9ng, h\u00e3y x\u00e1c minh c\u00e1c m\u1ee5c sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c nh\u1eadn c\u1ea3 hai m\u00f4-\u0111un SFP \u0111\u1ec1u t\u01b0\u01a1ng th\u00edch<\/p><\/li><li><p>Ki\u1ec3m tra \u0111\u1ed9 ph\u00e2n c\u1ef1c s\u1ee3i TX\/RX<\/p><\/li><li><p>\u0110\u1ea3m b\u1ea3o t\u1ed1c \u0111\u1ed9 li\u00ean k\u1ebft gi\u1ed1ng nhau tr\u00ean c\u1ea3 hai thi\u1ebft b\u1ecb<\/p><\/li><li><p>X\u00e1c minh c\u00e0i \u0111\u1eb7t FEC<\/p><\/li><li><p>L\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i LC<\/p><\/li><li><p>Ki\u1ec3m tra t\u00ecnh tr\u1ea1ng c\u00e1p s\u1ee3i quang<\/p><\/li><li><p>Xem l\u1ea1i gi\u00e1 tr\u1ecb \u0111\u1ecdc c\u00f4ng su\u1ea5t quang t\u1eeb DOM<\/p><\/li><li><p>Ki\u1ec3m tra b\u1eb1ng b\u1ed9 quang h\u1ecdc \u0111\u00e3 bi\u1ebft l\u00e0 t\u1ed1t<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n ghi nh\u1edb<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ph\u1ea7n l\u1edbn s\u1ef1 c\u1ed1 li\u00ean k\u1ebft SFP l\u00e0 c\u00e1c v\u1ea5n \u0111\u1ec1 \u1edf t\u1ea7ng v\u1eadt l\u00fd.<\/p><\/li><li><p>T\u00ednh t\u01b0\u01a1ng th\u00edch, \u0111\u1ed9 ph\u00e2n c\u1ef1c v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u l\u00e0 c\u00e1c nguy\u00ean nh\u00e2n g\u1ed1c ph\u1ed5 bi\u1ebfn nh\u1ea5t.<\/p><\/li><li><p>\u0110\u1ea7u n\u1ed1i s\u1ee3i quang b\u1ea9n c\u00f3 th\u1ec3 g\u00e2y m\u1ea5t \u1ed5n \u0111\u1ecbnh nghi\u00eam tr\u1ecdng ngay c\u1ea3 khi ph\u1ea7n c\u1ee9ng tr\u00f4ng nh\u01b0 \u0111\u00e3 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i.<\/p><\/li><li><p>Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 theo ph\u01b0\u01a1ng ph\u00e1p h\u1ec7 th\u1ed1ng nhanh h\u01a1n vi\u1ec7c thay th\u1ebf ng\u1eabu nhi\u00ean c\u00e1c b\u1ed9 thu ph\u00e1t.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udfe0 Nh\u1eefng v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch n\u00e0o l\u00e0m gi\u00e1n \u0111o\u1ea1n li\u00ean k\u1ebft SFP?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch SFP x\u1ea3y ra khi b\u1ed9 thu ph\u00e1t, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-a-network-switch\/\">b\u1ed9 chuy\u1ec3n m\u1ea1ch<\/a>, c\u00e1p ho\u1eb7c c\u00e0i \u0111\u1eb7t c\u1ed5ng kh\u00f4ng th\u1ec3 ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c. C\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn nh\u1ea5t bao g\u1ed3m: quang h\u1ecdc \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a theo nh\u00e0 s\u1ea3n xu\u1ea5t, sai l\u1ec7ch t\u1ed1c \u0111\u1ed9, b\u01b0\u1edbc s\u00f3ng kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3, kh\u00f4ng t\u01b0\u01a1ng th\u00edch FEC v\u00e0 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c chu\u1ea9n SFP v\u00e0 SFP+. Trong c\u00e1c m\u1ea1ng s\u1ea3n xu\u1ea5t, c\u00e1c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n h\u00e0ng \u0111\u1ea7u khi\u1ebfn li\u00ean k\u1ebft SFP b\u1ecb t\u1eaft ho\u1eb7c ch\u1eadp ch\u1eddn li\u00ean t\u1ee5c.<\/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\/9a7099d503814cbc8d6a9ff4f273524f.jpg\" alt=\"What Compatibility Problems Break an SFP Link?\" class=\"wp-image-7296\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9a7099d503814cbc8d6a9ff4f273524f.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9a7099d503814cbc8d6a9ff4f273524f-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9a7099d503814cbc8d6a9ff4f273524f-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9a7099d503814cbc8d6a9ff4f273524f-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9a7099d503814cbc8d6a9ff4f273524f-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >V\u00ec sao t\u00ednh t\u01b0\u01a1ng th\u00edch SFP l\u1ea1i quan tr\u1ecdng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng cho r\u1eb1ng t\u1ea5t c\u1ea3 c\u00e1c m\u00f4-\u0111un SFP \u0111\u1ec1u tu\u00e2n theo c\u00f9ng m\u1ed9t ti\u00eau chu\u1ea9n v\u00e0 do \u0111\u00f3 ph\u1ea3i ho\u1ea1t \u0111\u1ed9ng tr\u00ean m\u1ecdi thi\u1ebft b\u1ecb. Tr\u00ean th\u1ef1c t\u1ebf, c\u00e1c switch v\u00e0 router hi\u1ec7n \u0111\u1ea1i th\u01b0\u1eddng x\u00e1c th\u1ef1c:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u00e3 h\u00f3a theo nh\u00e0 s\u1ea3n xu\u1ea5t<\/p><\/li><li><p>Th\u00f4ng tin EEPROM<\/p><\/li><li><p>C\u00e1c ti\u00eau chu\u1ea9n Ethernet \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li><li><p>Th\u00f4ng s\u1ed1 quang h\u1ecdc<\/p><\/li><li><p>Y\u00eau c\u1ea7u c\u00f4ng su\u1ea5t<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu thi\u1ebft b\u1ecb t\u1eeb ch\u1ed1i b\u1ea5t k\u1ef3 \u0111i\u1ec1u ki\u1ec7n n\u00e0o trong s\u1ed1 n\u00e0y, c\u1ed5ng c\u00f3 th\u1ec3 v\u00f4 hi\u1ec7u h\u00f3a ho\u00e0n to\u00e0n li\u00ean k\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ecbnh ngh\u0129a nh\u1ecf: M\u00e3 h\u00f3a theo nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1ec1 c\u1eadp \u0111\u1ebfn d\u1eef li\u1ec7u nh\u1eadn d\u1ea1ng \u0111\u01b0\u1ee3c l\u1eadp tr\u00ecnh v\u00e0o EEPROM c\u1ee7a m\u00f4-\u0111un SFP \u0111\u1ec3 kh\u1edbp v\u1edbi nh\u00e0 s\u1ea3n xu\u1ea5t switch c\u1ee5 th\u1ec3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >M\u00f4-\u0111un SFP \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a theo nh\u00e0 s\u1ea3n xu\u1ea5t<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y l\u1ed7i li\u00ean k\u1ebft SFP l\u00e0 vi\u1ec7c kh\u00f3a thi\u1ebft b\u1ecb theo nh\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 th\u01b0\u01a1ng hi\u1ec7u thi\u1ebft b\u1ecb m\u1ea1ng ch\u1ec9 cho ph\u00e9p s\u1eed d\u1ee5ng quang h\u1ecdc \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t. N\u1ebfu m\u00e3 h\u00f3a EEPROM kh\u00f4ng kh\u1edbp v\u1edbi ch\u00ednh s\u00e1ch c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u1ed5ng c\u00f3 th\u1ec3 v\u1eabn b\u1ecb v\u00f4 hi\u1ec7u h\u00f3a<\/p><\/li><li><p>C\u00e1c th\u00f4ng b\u00e1o c\u1ea3nh b\u00e1o c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n<\/p><\/li><li><p>Vi\u1ec7c gi\u00e1m s\u00e1t DOM c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i<\/p><\/li><li><p>Li\u00ean k\u1ebft c\u00f3 th\u1ec3 tr\u1edf n\u00ean kh\u00f4ng \u1ed5n \u0111\u1ecbnh<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4i tr\u01b0\u1eddng th\u01b0\u1eddng b\u1ecb \u1ea3nh h\u01b0\u1edfng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Cisco<\/p><\/li><li><p>HPE<\/p><\/li><li><p>Juniper<br><\/p><\/li><li><p>Arista<\/p><\/li><li><p>Ubiquiti<\/p><\/li><li><p>NIC Intel<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 l\u00fd do v\u00ec sao nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng Reddit t\u00ecm ki\u1ebfm:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u201c<a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/477562.htm\">SFP t\u01b0\u01a1ng th\u00edch Cisco<\/a>\u201d<\/p><\/li><li><p>\u201cB\u1ed9 thu ph\u00e1t \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a cho Intel\u201d<\/p><\/li><li><p>\u201cSFP b\u00ean th\u1ee9 ba kh\u00f4ng \u0111\u01b0\u1ee3c nh\u1eadn di\u1ec7n\u201d<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >Sai l\u1ec7ch t\u1ed1c \u0111\u1ed9 gi\u1eefa SFP v\u00e0 SFP+<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00f4-\u0111un SFP v\u00e0 SFP+ v\u1ec1 m\u1eb7t v\u1eadt l\u00fd kh\u00e1 gi\u1ed1ng nhau, nh\u01b0ng ch\u00fang h\u1ed7 tr\u1ee3 c\u00e1c t\u1ed1c \u0111\u1ed9 kh\u00e1c nhau.<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 255px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"255\"><p>Lo\u1ea1i m\u00f4-\u0111un<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>T\u1ed1c \u0111\u1ed9 \u0111i\u1ec3n h\u00ecnh<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"255\"><p>SFP<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>1G<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"255\"><p>SFP+<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec5u \u0111i\u1ec7n t\u1eeb, \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t.<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>L\u1eafp \u0111\u1eb7t quang h\u1ecdc 1G v\u00e0o c\u1ed5ng ch\u1ec9 h\u1ed7 tr\u1ee3 10G<\/p><\/li><li><p>K\u1ebft n\u1ed1i <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475852.htm\">Quang h\u1ecdc 10G<\/a> v\u00e0o thi\u1ebft b\u1ecb b\u1ecb gi\u1edbi h\u1ea1n \u1edf t\u1ed1c \u0111\u1ed9 1G<\/p><\/li><li><p>K\u1ebft h\u1ee3p c\u00e1c c\u00e0i \u0111\u1eb7t t\u1ef1 \u0111\u1ed3ng b\u1ed9 h\u00f3a kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 c\u1ed5ng h\u1ed7 tr\u1ee3 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch ng\u01b0\u1ee3c, trong khi m\u1ed9t s\u1ed1 kh\u00e1c th\u00ec kh\u00f4ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Sai l\u1ec7ch b\u01b0\u1edbc s\u00f3ng v\u00e0 lo\u1ea1i c\u00e1p quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Li\u00ean k\u1ebft c\u00e1p quang y\u00eau c\u1ea7u c\u00e1c th\u00f4ng s\u1ed1 quang h\u1ecdc ph\u1ea3i kh\u1edbp nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>850nm <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476099.htm\">quang h\u1ecdc SR<\/a> ph\u1ea3i gh\u00e9p n\u1ed1i v\u1edbi quang h\u1ecdc SR 850nm<\/p><\/li><li><p>1310nm <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/491664.htm\">Quang h\u1ecdc LR<\/a> ph\u1ea3i k\u1ebft n\u1ed1i v\u1edbi c\u00e1c m\u00f4-\u0111un LR t\u01b0\u01a1ng th\u00edch<\/p><\/li><li><p>C\u00e1p quang \u0111\u01a1n mode v\u00e0 \u0111a mode kh\u00f4ng lu\u00f4n c\u00f3 th\u1ec3 tr\u1ed9n l\u1eabn m\u1ed9t c\u00e1ch an to\u00e0n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c t\u1ed5 h\u1ee3p kh\u00f4ng \u0111\u00fang th\u01b0\u1eddng g\u00e2y ra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kh\u00f4ng \u0111\u1ed3ng b\u1ed9 quang h\u1ecdc<\/p><\/li><li><p>Ph\u00e1t hi\u1ec7n t\u00edn hi\u1ec7u y\u1ebfu<\/p><\/li><li><p>M\u1ea5t \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e0i \u0111\u1eb7t FEC kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c li\u00ean k\u1ebft Ethernet t\u1ed1c \u0111\u1ed9 cao ng\u00e0y c\u00e0ng ph\u1ee5 thu\u1ed9c v\u00e0o B\u1ed9 s\u1eeda l\u1ed7i ti\u1ebfn tr\u01b0\u1edbc (FEC).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu m\u1ed9t b\u00ean b\u1eadt RS-FEC trong khi b\u00ean kia t\u1eaft FEC:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i ho\u00e0n to\u00e0n<\/p><\/li><li><p>L\u1ed7i g\u00f3i tin c\u00f3 th\u1ec3 t\u0103ng l\u00ean<\/p><\/li><li><p>Hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea5p nh\u00e1y ng\u1eaft qu\u00e3ng c\u00f3 th\u1ec3 x\u1ea3y ra<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ea5n \u0111\u1ec1 n\u00e0y \u0111\u1eb7c bi\u1ec7t ph\u1ed5 bi\u1ebfn trong:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ethernet 25G<\/p><\/li><li><p>Li\u00ean k\u1ebft l\u00ean 100G<\/p><\/li><li><p>C\u00e1c tri\u1ec3n khai DAC<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ecbnh ngh\u0129a vi m\u00f4: FEC (Forward Error Correction) l\u00e0 c\u01a1 ch\u1ebf ph\u1ee5c h\u1ed3i l\u1ed7i \u1edf t\u1ea7ng v\u1eadt l\u00fd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong truy\u1ec1n d\u1eabn Ethernet t\u1ed1c \u0111\u1ed9 cao.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >V\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch SFP \u0111\u1ed3ng b\u1ed9 RJ45<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476812.htm\">C\u00e1c m\u00f4-\u0111un SFP RJ45<\/a> t\u1ea1o ra nhi\u1ec1u th\u00e1ch th\u1ee9c v\u1ec1 t\u01b0\u01a1ng th\u00edch h\u01a1n <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/478231.htm\">module quang<br><\/a> v\u00ec ch\u00fang ch\u1ee9a chip PHY t\u00edch h\u1ee3p v\u00e0 ti\u00eau th\u1ee5 nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Nhi\u1ec7t \u0111\u1ed9 qu\u00e1 cao<\/p><\/li><li><p>M\u1ee9c ti\u00eau th\u1ee5 c\u00f4ng su\u1ea5t kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li><li><p>Th\u1ea5t b\u1ea1i trong \u0111\u00e0m ph\u00e1n PHY<\/p><\/li><li><p>H\u1ed7 tr\u1ee3 c\u1ed5ng b\u1ecb h\u1ea1n ch\u1ebf<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 switch ch\u1ec9 h\u1ed7 tr\u1ee3 c\u00e1c lo\u1ea1i c\u1ee5 th\u1ec3 <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476800.htm\">transceiver RJ45<\/a> ngay c\u1ea3 khi c\u00e1c module quang SFP chu\u1ea9n ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Danh s\u00e1ch ki\u1ec3m tra g\u1ee1 r\u1ed1i t\u00ednh t\u01b0\u01a1ng th\u00edch<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi thay th\u1ebf ph\u1ea7n c\u1ee9ng, h\u00e3y x\u00e1c minh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Switch ch\u00ednh th\u1ee9c h\u1ed7 tr\u1ee3 module SFP \u0111\u00f3<\/p><\/li><li><p>C\u1ea3 hai ph\u00eda \u0111\u1ec1u s\u1eed d\u1ee5ng c\u00f9ng ti\u00eau chu\u1ea9n t\u1ed1c \u0111\u1ed9<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-wavelengths-850nm-1310nm-1550nm-guide\/\">B\u01b0\u1edbc s\u00f3ng<\/a> kh\u1edbp ch\u00ednh x\u00e1c<\/p><\/li><li><p>Lo\u1ea1i s\u1ee3i quang ph\u00f9 h\u1ee3p v\u1edbi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a module quang<\/p><\/li><li><p>C\u00e0i \u0111\u1eb7t FEC nh\u1ea5t qu\u00e1n<\/p><\/li><li><p>Ph\u1ea7n m\u1ec1m\u56fa\u4ef6 \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt<\/p><\/li><li><p>Y\u00eau c\u1ea7u c\u00f4ng su\u1ea5t c\u1ee7a module SFP RJ45 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n ghi nh\u1edb<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch SFP l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y th\u1ea5t b\u1ea1i li\u00ean k\u1ebft.<\/p><\/li><li><p>M\u00e3 h\u00f3a nh\u00e0 cung c\u1ea5p, ch\u00eanh l\u1ec7ch t\u1ed1c \u0111\u1ed9 v\u00e0 c\u00e0i \u0111\u1eb7t FEC th\u01b0\u1eddng l\u00e0m gi\u00e1n \u0111o\u1ea1n li\u00ean k\u1ebft.<\/p><\/li><li><p>C\u00e1c module SFP RJ45 th\u01b0\u1eddng t\u1ea1o th\u00eam r\u1ee7i ro v\u1ec1 t\u00ednh t\u01b0\u01a1ng th\u00edch.<\/p><\/li><li><p>Vi\u1ec7c kh\u1edbp \u0111\u00fang module quang, lo\u1ea1i s\u1ee3i quang v\u00e0 ti\u00eau chu\u1ea9n Ethernet l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu \u0111\u1ec3 v\u1eadn h\u00e0nh \u1ed5n \u0111\u1ecbnh.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udfe0 G\u1ee1 r\u1ed1i t\u1eebng b\u01b0\u1edbc c\u00e1c s\u1ef1 c\u1ed1 li\u00ean k\u1ebft SFP<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch nhanh nh\u1ea5t \u0111\u1ec3 g\u1ee1 r\u1ed1i s\u1ef1 c\u1ed1 li\u00ean k\u1ebft SFP l\u00e0 c\u00f4 l\u1eadp v\u1ea5n \u0111\u1ec1 theo t\u1eebng l\u1edbp. B\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c ki\u1ec3m tra k\u1ebft n\u1ed1i v\u1eadt l\u00fd, sau \u0111\u00f3 x\u00e1c minh t\u00ednh t\u01b0\u01a1ng th\u00edch c\u1ee7a module, ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u quang, c\u1ea5u h\u00ecnh t\u1ed1c \u0111\u1ed9 v\u00e0 c\u00e0i \u0111\u1eb7t FEC. Trong m\u00f4i tr\u01b0\u1eddng doanh nghi\u1ec7p, h\u1ea7u h\u1ebft c\u00e1c s\u1ef1 c\u1ed1 li\u00ean k\u1ebft SFP c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh trong v\u00e0i ph\u00fat b\u1eb1ng quy tr\u00ecnh g\u1ee1 r\u1ed1i c\u00f3 c\u1ea5u tr\u00fac thay v\u00ec thay th\u1ebf ph\u1ea7n c\u1ee9ng m\u1ed9t c\u00e1ch ng\u1eabu nhi\u00ean.<\/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\/b8c45d2e95fd4aaaa2b7b654375d86ac.jpg\" alt=\"Troubleshoot SFP Link Issues Step by Step\" class=\"wp-image-7297\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b8c45d2e95fd4aaaa2b7b654375d86ac.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b8c45d2e95fd4aaaa2b7b654375d86ac-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b8c45d2e95fd4aaaa2b7b654375d86ac-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b8c45d2e95fd4aaaa2b7b654375d86ac-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b8c45d2e95fd4aaaa2b7b654375d86ac-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u01b0\u1edbc 1: Ki\u1ec3m tra k\u1ebft n\u1ed1i v\u1eadt l\u00fd<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eaft \u0111\u1ea7u t\u1eeb c\u00e1c nguy\u00ean nh\u00e2n \u0111\u01a1n gi\u1ea3n nh\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">X\u00e1c minh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Module SFP \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1eafm \u0111\u1ea7y \u0111\u1ee7<\/p><\/li><li><p>S\u1ee3i quang ho\u1eb7c <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26454-dac-aoc-aec-cables.htm\">C\u00e1p DAC<\/a> \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i ch\u1eafc ch\u1eafn<\/p><\/li><li><p>\u0110\u00e8n LED c\u1ed5ng hi\u1ec3n th\u1ecb ho\u1ea1t \u0111\u1ed9ng<\/p><\/li><li><p>C\u00e1p kh\u00f4ng b\u1ecb cong ho\u1eb7c h\u01b0 h\u1ecfng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi li\u00ean k\u1ebft s\u1ee3i quang:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c nh\u1eadn TX k\u1ebft n\u1ed1i v\u1edbi RX<\/p><\/li><li><p>Ki\u1ec3m tra \u0111\u1ed9 s\u1ea1ch c\u1ee7a \u0111\u1ea7u n\u1ed1i LC<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ea7u n\u1ed1i s\u1ee3i quang b\u1ea9n l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n th\u01b0\u1eddng b\u1ecb b\u1ecf qua nh\u1ea5t g\u00e2y ra l\u1ed7i CRC\/FCS v\u00e0 li\u00ean k\u1ebft kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u01b0\u1edbc 2: X\u00e1c minh t\u00ednh t\u01b0\u01a1ng th\u00edch c\u1ee7a SFP<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ec3m tra xem b\u1ed9 chuy\u1ec3n m\u1ea1ch ho\u1eb7c <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-a-router-key-functions-types\/\">b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn<\/a> c\u00f3 h\u1ed7 tr\u1ee3 b\u1ed9 thu ph\u00e1t \u0111\u00e3 c\u00e0i \u0111\u1eb7t hay kh\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u00e3 h\u00f3a nh\u00e0 cung c\u1ea5p kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li><li><p>Th\u00f4ng tin EEPROM kh\u00f4ng ch\u00ednh x\u00e1c<\/p><\/li><li><p>M\u00f4-\u0111un SFP RJ45 kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li><li><p>Tr\u1ed9n l\u1eabn quang h\u1ecdc 1G v\u00e0 10G<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t ph\u00e9p ki\u1ec3m tra nhanh l\u00e0 thay th\u1ebf m\u00f4-\u0111un b\u1eb1ng quang h\u1ecdc \u0111\u00e3 bi\u1ebft l\u00e0 t\u01b0\u01a1ng th\u00edch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ecbnh ngh\u0129a vi m\u00f4: EEPROM l\u00e0 b\u1ed9 nh\u1edb nh\u1eadn d\u1ea1ng b\u00ean trong m\u00f4-\u0111un SFP, l\u01b0u tr\u1eef d\u1eef li\u1ec7u nh\u00e0 cung c\u1ea5p v\u00e0 kh\u1ea3 n\u0103ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u01b0\u1edbc 3: X\u00e1c nh\u1eadn c\u00e0i \u0111\u1eb7t t\u1ed1c \u0111\u1ed9 v\u00e0 song c\u00f4ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ea3 hai ph\u00eda c\u1ee7a li\u00ean k\u1ebft \u0111\u1ec1u ph\u1ea3i s\u1eed d\u1ee5ng c\u00e1c c\u00e0i \u0111\u1eb7t Ethernet t\u01b0\u01a1ng th\u00edch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">X\u00e1c minh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed1c \u0111\u1ed9 li\u00ean k\u1ebft kh\u1edbp nhau<\/p><\/li><li><p>C\u00e0i \u0111\u1eb7t t\u1ef1 th\u01b0\u01a1ng l\u01b0\u1ee3ng kh\u1edbp nhau<\/p><\/li><li><p>Ch\u1ebf \u0111\u1ed9 c\u1ed5ng \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u00fang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476091.htm\">Quang h\u1ecdc 1G<\/a> \u0111\u01b0\u1ee3c ch\u00e8n v\u00e0o c\u1ed5ng ch\u1ec9 h\u1ed7 tr\u1ee3 10G<\/p><\/li><li><p>Kh\u00f4ng kh\u1edbp t\u1ed1c \u0111\u1ed9 do thi\u1ebft l\u1eadp c\u1ed1 \u0111\u1ecbnh<\/p><\/li><li><p>C\u1ea5u h\u00ecnh ph\u00e2n nh\u00e1nh (breakout) kh\u00f4ng \u0111\u00fang<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u01b0\u1edbc 4: Ki\u1ec3m tra m\u1ee9c c\u00f4ng su\u1ea5t quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u1ed9 thu ph\u00e1t hi\u1ec7n \u0111\u1ea1i h\u1ed7 tr\u1ee3 DOM (Gi\u00e1m s\u00e1t quang k\u1ef9 thu\u1eadt s\u1ed1), cho ph\u00e9p k\u1ef9 s\u01b0 xem:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t quang TX<\/p><\/li><li><p>C\u00f4ng su\u1ea5t quang RX<\/p><\/li><li><p>Nhi\u1ec7t \u0111\u1ed9<\/p><\/li><li><p>\u0110i\u1ec7n \u00e1p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu c\u00f4ng su\u1ea5t RX qu\u00e1 th\u1ea5p:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ed9 suy hao s\u1ee3i quang c\u00f3 th\u1ec3 qu\u00e1 cao<\/p><\/li><li><p>\u0110\u1ea7u n\u1ed1i c\u00f3 th\u1ec3 b\u1ea9n<\/p><\/li><li><p>C\u00e1p c\u00f3 th\u1ec3 b\u1ecb h\u01b0 h\u1ecfng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu c\u00f4ng su\u1ea5t RX qu\u00e1 cao:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f3 th\u1ec3 x\u1ea3y ra qu\u00e1 t\u1ea3i b\u1ed9 thu tr\u00ean c\u00e1c li\u00ean k\u1ebft ch\u1ebf \u0111\u1ed9 \u0111\u01a1n (single-mode) kho\u1ea3ng c\u00e1ch ng\u1eafn<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u01b0\u1edbc 5: X\u00e1c minh c\u1ea5u h\u00ecnh FEC<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c li\u00ean k\u1ebft Ethernet t\u1ed1c \u0111\u1ed9 cao nh\u01b0 25G v\u00e0 100G th\u01b0\u1eddng y\u00eau c\u1ea7u c\u00e0i \u0111\u1eb7t FEC kh\u1edbp nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu m\u1ed9t ph\u00eda s\u1eed d\u1ee5ng RS-FEC c\u00f2n ph\u00eda kia t\u1eaft FEC:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft c\u00f3 th\u1ec3 kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng<\/p><\/li><li><p>L\u1ed7i g\u00f3i tin c\u00f3 th\u1ec3 t\u0103ng l\u00ean<\/p><\/li><li><p>Li\u00ean k\u1ebft c\u00f3 th\u1ec3 b\u1ecb nh\u1ea5p nh\u00e1y (flapping)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ea5n \u0111\u1ec1 n\u00e0y \u0111\u1eb7c bi\u1ec7t ph\u1ed5 bi\u1ebfn v\u1edbi c\u00e1p DAC v\u00e0 c\u00e1c li\u00ean k\u1ebft quang t\u1ed1c \u0111\u1ed9 cao.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u01b0\u1edbc 6: Ki\u1ec3m tra b\u1eb1ng c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u00e3 bi\u1ebft l\u00e0 t\u1ed1t<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu s\u1ef1 c\u1ed1 v\u1eabn ch\u01b0a \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft, h\u00e3y c\u00f4 l\u1eadp l\u1ed7i b\u1eb1ng c\u00e1ch thay t\u1eebng th\u00e0nh ph\u1ea7n ri\u00eang l\u1ebb.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ec3m tra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u00f4-\u0111un SFP kh\u00e1c<\/p><\/li><li><p>C\u00e1p s\u1ee3i quang kh\u00e1c<\/p><\/li><li><p>C\u1ed5ng chuy\u1ec3n m\u1ea1ch kh\u00e1c<\/p><\/li><li><p>Thi\u1ebft b\u1ecb kh\u00e1c<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y gi\u00fap nhanh ch\u00f3ng x\u00e1c \u0111\u1ecbnh xem s\u1ef1 c\u1ed1 do:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u1ed9 quang h\u1ecdc<\/p><\/li><li><p>C\u00e1p<\/p><\/li><li><p>Ph\u1ea7n c\u1ee9ng chuy\u1ec3n m\u1ea1ch<\/p><\/li><li><p>C\u1ea5u h\u00ecnh<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >Danh s\u00e1ch ki\u1ec3m tra kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 SFP nhanh<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 309px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"309\"><p>M\u1ee5c c\u1ea7n ki\u1ec3m tra<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>M\u1ee5c \u0111\u00edch<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"309\"><p>X\u00e1c minh vi\u1ec7c l\u1eafp m\u00f4-\u0111un<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>X\u00e1c nh\u1eadn k\u1ebft n\u1ed1i v\u1eadt l\u00fd<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"309\"><p>Ki\u1ec3m tra c\u1ef1c t\u00ednh s\u1ee3i quang<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ea3m b\u1ea3o s\u1ef1 c\u0103n ch\u1ec9nh TX\/RX<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"309\"><p>L\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i LC<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Lo\u1ea1i b\u1ecf nhi\u1ec5m b\u1ea9n quang h\u1ecdc<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"309\"><p>X\u00e1c nh\u1eadn t\u00ednh t\u01b0\u01a1ng th\u00edch<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Tr\u00e1nh c\u00e1c v\u1ea5n \u0111\u1ec1 kh\u00f3a nh\u00e0 cung c\u1ea5p (vendor lock)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"309\"><p>Kh\u1edbp c\u00e0i \u0111\u1eb7t t\u1ed1c \u0111\u1ed9\/FEC<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ng\u0103n ch\u1eb7n s\u1ef1 c\u1ed1 th\u01b0\u01a1ng l\u01b0\u1ee3ng<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"309\"><p>Ki\u1ec3m tra c\u00e1c gi\u00e1 tr\u1ecb DOM<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>X\u00e1c th\u1ef1c ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"309\"><p>Thay th\u1ebf c\u00e1c b\u1ed9 quang h\u1ecdc \u0111\u00e3 bi\u1ebft l\u00e0 t\u1ed1t<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1ch ly c\u00e1c s\u1ef1 c\u1ed1 ph\u1ea7n c\u1ee9ng<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n ghi nh\u1edb<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>H\u1ea7u h\u1ebft c\u00e1c s\u1ef1 c\u1ed1 li\u00ean k\u1ebft SFP c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft th\u00f4ng qua vi\u1ec7c ch\u1ea9n \u0111o\u00e1n c\u00f3 h\u1ec7 th\u1ed1ng \u1edf t\u1ea7ng v\u1eadt l\u00fd.<\/p><\/li><li><p>T\u00ednh t\u01b0\u01a1ng th\u00edch, c\u1ef1c t\u00ednh s\u1ee3i quang v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u quang l\u00e0 nh\u1eefng ki\u1ec3m tra quan tr\u1ecdng nh\u1ea5t.<\/p><\/li><li><p>C\u00e1c gi\u00e1 tr\u1ecb DOM cung c\u1ea5p th\u00f4ng tin ch\u1ea9n \u0111o\u00e1n th\u1eddi gian th\u1ef1c qu\u00fd gi\u00e1.<\/p><\/li><li><p>Thay th\u1ebf linh ki\u1ec7n m\u1ed9t c\u00e1ch ng\u1eabu nhi\u00ean ch\u1eadm h\u01a1n so v\u1edbi ki\u1ec3m tra c\u00e1ch ly c\u00f3 h\u1ec7 th\u1ed1ng.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udfe0 L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ng\u0103n ch\u1eb7n hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea5p nh\u00e1y li\u00ean k\u1ebft (link flapping) v\u00e0 c\u00e1c l\u1ed7i kh\u00f4ng li\u00ean t\u1ee5c?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 ng\u0103n ch\u1eb7n hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea5p nh\u00e1y li\u00ean k\u1ebft SFP v\u00e0 c\u00e1c l\u1ed7i m\u1ea1ng kh\u00f4ng li\u00ean t\u1ee5c, tr\u01b0\u1edbc ti\u00ean c\u1ea7n t\u1eadp trung v\u00e0o \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a t\u1ea7ng v\u1eadt l\u00fd. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7u qu\u1ea3 nh\u1ea5t bao g\u1ed3m s\u1eed d\u1ee5ng c\u00e1c module thu ph\u00e1t t\u01b0\u01a1ng th\u00edch, duy tr\u00ec c\u00e1c k\u1ebft n\u1ed1i s\u1ee3i quang s\u1ea1ch s\u1ebd, \u0111\u1ed3ng b\u1ed9 h\u00f3a c\u00e1c thi\u1ebft l\u1eadp FEC v\u00e0 t\u1ed1c \u0111\u1ed9, gi\u00e1m s\u00e1t m\u1ee9c c\u00f4ng su\u1ea5t quang qua DOM, \u0111\u1ed3ng th\u1eddi tr\u00e1nh s\u1eed d\u1ee5ng c\u00e1p ch\u1ea5t l\u01b0\u1ee3ng k\u00e9m ho\u1eb7c c\u00e1c module SFP RJ45 b\u1ecb qu\u00e1 nhi\u1ec7t. Trong h\u1ea7u h\u1ebft c\u00e1c m\u1ea1ng doanh nghi\u1ec7p, c\u00e1c li\u00ean k\u1ebft SFP kh\u00f4ng \u1ed5n \u0111\u1ecbnh ch\u1ee7 y\u1ebfu do c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u ch\u1ee9 kh\u00f4ng ph\u1ea3i do ph\u1ea7n m\u1ec1m chuy\u1ec3n m\u1ea1ch.<\/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\/06d14e75491341429977f44d6a98e1d4.jpg\" alt=\" How Do You Prevent Link Flapping and Intermittent Errors?\" class=\"wp-image-7298\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/06d14e75491341429977f44d6a98e1d4.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/06d14e75491341429977f44d6a98e1d4-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/06d14e75491341429977f44d6a98e1d4-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/06d14e75491341429977f44d6a98e1d4-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/06d14e75491341429977f44d6a98e1d4-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >Hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea5p nh\u00e1y li\u00ean k\u1ebft (Link Flapping) l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea5p nh\u00e1y li\u00ean k\u1ebft x\u1ea3y ra khi k\u1ebft n\u1ed1i SFP l\u1eb7p \u0111i l\u1eb7p l\u1ea1i thay \u0111\u1ed5i gi\u1eefa:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft b\u1eadt (Link Up)<\/p><\/li><li><p>Li\u00ean k\u1ebft t\u1eaft (Link Down)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 b\u1ea5t \u1ed5n n\u00e0y c\u00f3 th\u1ec3 x\u1ea3y ra trong v\u00e0i gi\u00e2y ho\u1eb7c kh\u00f4ng li\u00ean t\u1ee5c trong su\u1ed1t c\u1ea3 ng\u00e0y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c tri\u1ec7u ch\u1ee9ng ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ng\u1eaft k\u1ebft n\u1ed1i ng\u1eabu nhi\u00ean<\/p><\/li><li><p>M\u1ea5t g\u00f3i tin<\/p><\/li><li><p>L\u1ed7i CRC\/FCS<\/p><\/li><li><p>Hi\u1ec7u su\u1ea5t m\u1ea1ng ch\u1eadm<\/p><\/li><li><p>C\u00e1c s\u1ef1 ki\u1ec7n t\u00e1i t\u00ednh to\u00e1n STP<\/p><\/li><li><p>L\u1ed7i di chuy\u1ec3n l\u01b0u tr\u1eef ho\u1eb7c m\u00e1y \u1ea3o (VM)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-a-data-center\/\">trung t\u00e2m d\u1eef li\u1ec7u<br><\/a>, ngay c\u1ea3 nh\u1eefng l\u1ea7n gi\u00e1n \u0111o\u1ea1n li\u00ean k\u1ebft ng\u1eafn c\u0169ng c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh \u1ee9ng d\u1ee5ng v\u00e0 c\u00e1c kh\u1ed1i c\u00f4ng vi\u1ec7c nh\u1ea1y c\u1ea3m v\u1edbi \u0111\u1ed9 tr\u1ec5.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >S\u1eed d\u1ee5ng c\u00e1c module SFP ch\u1ea5t l\u01b0\u1ee3ng cao v\u00e0 t\u01b0\u01a1ng th\u00edch<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u1ed9 quang h\u1ecdc ch\u1ea5t l\u01b0\u1ee3ng th\u1ea5p ho\u1eb7c m\u00e3 h\u00f3a sai l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n l\u1edbn nh\u1ea5t g\u00e2y ra li\u00ean k\u1ebft kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng c\u00e1c b\u1ed9 thu ph\u00e1t t\u01b0\u01a1ng th\u00edch v\u1edbi nh\u00e0 cung c\u1ea5p<\/p><\/li><li><p>Tr\u00e1nh s\u1eed d\u1ee5ng c\u00e1c b\u1ed9 quang h\u1ecdc gi\u00e1 r\u1ebb ch\u01b0a \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn<\/p><\/li><li><p>\u0110\u1ea3m b\u1ea3o kh\u1edbp \u0111\u00fang chu\u1ea9n Ethernet<\/p><\/li><li><p>Ki\u1ec3m tra danh s\u00e1ch t\u01b0\u01a1ng th\u00edch c\u1ee7a switch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>K\u1ebft n\u1ed1i l\u00ean (uplinks) 10G\/25G<\/p><\/li><li><p>B\u1ed9 chuy\u1ec3n m\u1ea1ch doanh nghi\u1ec7p<\/p><\/li><li><p>Intel <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-nic-network-interface-card\/\">NIC<\/a> m\u00f4i tr\u01b0\u1eddng<\/p><\/li><li><p>RJ45 <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476771.htm\">C\u00e1c m\u00f4-\u0111un SFP \u0111\u1ed3ng<\/a><\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >Gi\u1eef s\u1ea1ch \u0111\u1ea7u n\u1ed1i s\u1ee3i quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec5m b\u1ea9n quang h\u1ecdc l\u00e0 nguy\u00ean nh\u00e2n ch\u00ednh g\u00e2y m\u1ea5t t\u00edn hi\u1ec7u kh\u00f4ng li\u00ean t\u1ee5c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 b\u1ee5i vi m\u00f4 c\u0169ng c\u00f3 th\u1ec3 g\u00e2y ra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ed9 suy hao t\u0103ng l\u00ean<\/p><\/li><li><p>Ph\u1ea3n x\u1ea1 t\u00edn hi\u1ec7u<\/p><\/li><li><p>L\u1ed7i CRC\/FCS<\/p><\/li><li><p>M\u1ea5t \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>L\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i LC tr\u01b0\u1edbc khi l\u1eafp \u0111\u1eb7t<\/p><\/li><li><p>S\u1eed d\u1ee5ng n\u1eafp \u0111\u1eady ch\u1ed1ng b\u1ee5i khi c\u1ed5ng kh\u00f4ng s\u1eed d\u1ee5ng<\/p><\/li><li><p>Tr\u00e1nh ch\u1ea1m tr\u1ef1c ti\u1ebfp v\u00e0o m\u1eb7t cu\u1ed1i s\u1ee3i quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ecbnh ngh\u0129a vi m\u00f4: <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/attenuation-in-optical-transceiver-management-and-solutions\/\">M\u1ee9c suy hao<\/a> l\u00e0 s\u1ef1 suy gi\u1ea3m d\u1ea7n c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u quang trong qu\u00e1 tr\u00ecnh truy\u1ec1n d\u1eabn.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Gi\u00e1m s\u00e1t c\u00f4ng su\u1ea5t quang b\u1eb1ng DOM<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DOM (Gi\u00e1m s\u00e1t quang k\u1ef9 thu\u1eadt s\u1ed1) gi\u00fap ph\u00e1t hi\u1ec7n suy gi\u1ea3m t\u00edn hi\u1ec7u tr\u01b0\u1edbc khi x\u1ea3y ra s\u1ef1 c\u1ed1 ho\u00e0n to\u00e0n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u1ea5u hi\u1ec7u c\u1ea3nh b\u00e1o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t RX g\u1ea7n ng\u01b0\u1ee1ng t\u1ed1i thi\u1ec3u<\/p><\/li><li><p>Dao \u0111\u1ed9ng quang \u0111\u1ed9t ng\u1ed9t<\/p><\/li><li><p>Nhi\u1ec7t \u0111\u1ed9 m\u00f4-\u0111un cao b\u1ea5t th\u01b0\u1eddng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c gi\u00e1m s\u00e1t DOM ch\u1ee7 \u0111\u1ed9ng hi\u1ec7n \u0111\u00e3 tr\u1edf th\u00e0nh quy tr\u00ecnh ti\u00eau chu\u1ea9n trong c\u00e1c m\u00f4i tr\u01b0\u1eddng trung t\u00e2m d\u1eef li\u1ec7u doanh nghi\u1ec7p v\u00e0 AI.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ed3ng b\u1ed9 t\u1ed1c \u0111\u1ed9 v\u00e0 c\u00e0i \u0111\u1eb7t FEC<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c li\u00ean k\u1ebft Ethernet t\u1ed1c \u0111\u1ed9 cao y\u00eau c\u1ea7u c\u1ea5u h\u00ecnh l\u1edbp v\u1eadt l\u00fd nh\u1ea5t qu\u00e1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u00e2y m\u1ea5t \u1ed5n \u0111\u1ecbnh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kh\u00f4ng kh\u1edbp t\u1ed1c \u0111\u1ed9<\/p><\/li><li><p>T\u1ef1 th\u01b0\u01a1ng l\u01b0\u1ee3ng kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li><li><p>Kh\u00f4ng kh\u1edbp FEC RS<\/p><\/li><li><p>C\u1ea5u h\u00ecnh ph\u00e2n nh\u00e1nh (breakout) kh\u00f4ng \u0111\u00fang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c li\u00ean k\u1ebft Ethernet 25G, 40G v\u00e0 100G \u0111\u1eb7c bi\u1ec7t nh\u1ea1y c\u1ea3m v\u1edbi s\u1ef1 kh\u00f4ng nh\u1ea5t qu\u00e1n c\u1ee7a FEC.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Tr\u00e1nh qu\u1ea3n l\u00fd c\u00e1p k\u00e9m<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u1ee8ng su\u1ea5t c\u01a1 h\u1ecdc l\u00ean c\u00e1p c\u00f3 th\u1ec3 l\u00e0m suy gi\u1ea3m hi\u1ec7u n\u0103ng quang theo th\u1eddi gian.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00e1nh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>U\u1ed1n cong s\u1ee3i quang qu\u00e1 ch\u1eb7t<\/p><\/li><li><p>L\u1ef1c k\u00e9o qu\u00e1 m\u1ee9c<\/p><\/li><li><p>C\u00e1c b\u00f3 c\u00e1p b\u1ecb qu\u00e1 nhi\u1ec7t<\/p><\/li><li><p>C\u00e1c c\u1ee5m c\u00e1p DAC ch\u1ea5t l\u01b0\u1ee3ng th\u1ea5p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o \u1ed5n \u0111\u1ecbnh d\u00e0i h\u1ea1n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Tu\u00e2n th\u1ee7 th\u00f4ng s\u1ed1 b\u00e1n k\u00ednh u\u1ed1n t\u1ed1i thi\u1ec3u<\/p><\/li><li><p>S\u1eed d\u1ee5ng nh\u00e3n d\u00e1n v\u00e0 \u0111i d\u00e2y c\u00e1p \u0111\u00fang c\u00e1ch<\/p><\/li><li><p>T\u00e1ch ri\u00eang tuy\u1ebfn \u0111\u01b0\u1eddng c\u00e1p \u0111i\u1ec7n v\u00e0 c\u00e1p quang khi c\u00f3 th\u1ec3<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u1ea3nh gi\u00e1c v\u1ea5n \u0111\u1ec1 nhi\u1ec7t \u0111\u1ed9 SFP RJ45<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un SFP \u0111\u1ed3ng RJ45 ti\u00eau th\u1ee5 nhi\u1ec1u \u0111i\u1ec7n n\u0103ng h\u01a1n c\u00e1c b\u1ed9 thu ph\u00e1t quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec7t \u0111\u1ed9 qu\u00e1 cao c\u00f3 th\u1ec3 g\u00e2y ra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-phy-physical-layer-basics-explained\/\">PHY<\/a> m\u1ea5t \u1ed5n \u0111\u1ecbnh<\/p><\/li><li><p>\u0110\u1eb7t l\u1ea1i li\u00ean k\u1ebft<\/p><\/li><li><p>H\u1ecfng g\u00f3i tin<\/p><\/li><li><p>Ng\u1eaft k\u1ebft n\u1ed1i ng\u1eabu nhi\u00ean<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ea3m b\u1ea3o lu\u1ed3ng kh\u00ed l\u00e0m m\u00e1t c\u1ee7a switch ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang c\u00e1ch<\/p><\/li><li><p>Tr\u00e1nh l\u1eafp \u0111\u1ea7y c\u00e1c c\u1ed5ng t\u1ecfa nhi\u1ec7t cao li\u1ec1n k\u1ec1 nhau<\/p><\/li><li><p>\u01afu ti\u00ean s\u1eed d\u1ee5ng li\u00ean k\u1ebft quang cho c\u00e1c tri\u1ec3n khai b\u0103ng th\u00f4ng cao k\u00e9o d\u00e0i khi c\u00f3 th\u1ec3<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >Danh s\u00e1ch ki\u1ec3m tra b\u1ea3o tr\u00ec ph\u00f2ng ng\u1eeba<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 299px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"299\"><p>Th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>L\u1ee3i \u00edch<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"299\"><p>S\u1eed d\u1ee5ng c\u00e1c b\u1ed9 thu ph\u00e1t quang t\u01b0\u01a1ng th\u00edch<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ng\u0103n ch\u1eb7n s\u1ef1 c\u1ed1 th\u01b0\u01a1ng l\u01b0\u1ee3ng<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"299\"><p>L\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i LC<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Gi\u1ea3m t\u1ed5n hao quang<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"299\"><p>Gi\u00e1m s\u00e1t c\u00e1c gi\u00e1 tr\u1ecb DOM<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ph\u00e1t hi\u1ec7n suy gi\u1ea3m s\u1edbm<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"299\"><p>\u0110\u1ed3ng b\u1ed9 c\u00e0i \u0111\u1eb7t FEC<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u1ea3i thi\u1ec7n \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh \u1edf t\u1ed1c \u0111\u1ed9 cao<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"299\"><p>S\u1eed d\u1ee5ng c\u00e1p ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Gi\u1ea3m l\u1ed7i ng\u1eaft qu\u00e3ng<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"299\"><p>Ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 b\u1ed9 thu ph\u00e1t<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ng\u0103n ch\u1eb7n hi\u1ec7n t\u01b0\u1ee3ng \u0111\u1eb7t l\u1ea1i ng\u1eabu nhi\u00ean<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n ghi nh\u1edb<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Hi\u1ec7n t\u01b0\u1ee3ng \u201clink flapping\u201d th\u01b0\u1eddng do m\u1ea5t \u1ed5n \u0111\u1ecbnh \u1edf l\u1edbp v\u1eadt l\u00fd g\u00e2y ra.<\/p><\/li><li><p>\u0110\u1ea7u n\u1ed1i b\u1ea9n, thi\u1ebft b\u1ecb quang k\u00e9m v\u00e0 kh\u00f4ng kh\u1edbp FEC l\u00e0 nh\u1eefng nguy\u00ean nh\u00e2n g\u1ed1c ph\u1ed5 bi\u1ebfn.<\/p><\/li><li><p>Vi\u1ec7c gi\u00e1m s\u00e1t DOM gi\u00fap x\u00e1c \u0111\u1ecbnh s\u1ef1 c\u1ed1 tr\u01b0\u1edbc khi li\u00ean k\u1ebft ho\u00e0n to\u00e0n th\u1ea5t b\u1ea1i.<\/p><\/li><li><p>Qu\u1ea3n l\u00fd c\u00e1p \u0111\u00fang c\u00e1ch v\u00e0 ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 c\u1ea3i thi\u1ec7n \u0111\u1ed9 tin c\u1eady d\u00e0i h\u1ea1n c\u1ee7a SFP.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udfe0 C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p: C\u00e1c c\u00e2u h\u1ecfi ph\u1ed5 bi\u1ebfn v\u1ec1 li\u00ean k\u1ebft SFP<\/h2>\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\/2b929ae039f74c42a631f507e1ba33cf.jpg\" alt=\"FAQ: Common SFP Link Questions\" class=\"wp-image-7299\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2b929ae039f74c42a631f507e1ba33cf.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2b929ae039f74c42a631f507e1ba33cf-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2b929ae039f74c42a631f507e1ba33cf-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2b929ae039f74c42a631f507e1ba33cf-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2b929ae039f74c42a631f507e1ba33cf-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e2u h\u1ecfi 1: C\u00f3 ph\u1ea3i b\u1ea5t k\u1ef3 m\u00f4-\u0111un SFP n\u00e0o c\u0169ng ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c tr\u00ean m\u1ecdi switch kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng. M\u1eb7c d\u00f9 c\u00e1c m\u00f4-\u0111un SFP tu\u00e2n theo ti\u00eau chu\u1ea9n ng\u00e0nh, nhi\u1ec1u switch v\u1eabn \u00e1p d\u1ee5ng ki\u1ec3m tra t\u01b0\u01a1ng th\u00edch nh\u00e0 s\u1ea3n xu\u1ea5t th\u00f4ng qua m\u00e3 h\u00f3a EEPROM.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 switch h\u1ed7 tr\u1ee3 <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475829.htm\">Thi\u1ebft b\u1ecb quang h\u1ecdc c\u1ee7a b\u00ean th\u1ee9 ba<\/a>, trong khi nh\u1eefng switch kh\u00e1c c\u00f3 th\u1ec3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>V\u00f4 hi\u1ec7u h\u00f3a c\u00e1c m\u00f4-\u0111un kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li><li><p>Hi\u1ec3n th\u1ecb c\u1ea3nh b\u00e1o t\u01b0\u01a1ng th\u00edch<\/p><\/li><li><p>Gi\u1edbi h\u1ea1n ch\u1ee9c n\u0103ng DOM<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Lu\u00f4n ki\u1ec3m tra danh s\u00e1ch t\u01b0\u01a1ng th\u00edch c\u1ee7a b\u1ed9 chuy\u1ec3n m\u1ea1ch tr\u01b0\u1edbc khi tri\u1ec3n khai.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e2u h\u1ecfi 2: T\u1ea1i sao \u0111\u00e8n li\u00ean k\u1ebft SFP c\u1ee7a t\u00f4i t\u1eaft?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e8n li\u00ean k\u1ebft SFP th\u01b0\u1eddng t\u1eaft v\u00ec c\u00e1c l\u00fd do sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u00f4-\u0111un kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li><li><p>C\u1ef1c t\u00ednh s\u1ee3i quang b\u1ecb \u0111\u1ea3o ng\u01b0\u1ee3c<\/p><\/li><li><p>T\u00edn hi\u1ec7u quang b\u1ecb m\u1ea5t<\/p><\/li><li><p>C\u00e0i \u0111\u1eb7t t\u1ed1c \u0111\u1ed9 kh\u00f4ng kh\u1edbp nhau<\/p><\/li><li><p>C\u00e1p ho\u1eb7c \u0111\u1ea7u n\u1ed1i b\u1ecb h\u01b0 h\u1ecfng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c s\u1ef1 c\u1ed1 \u1edf t\u1ea7ng v\u1eadt l\u00fd ph\u1ed5 bi\u1ebfn h\u01a1n nhi\u1ec1u so v\u1edbi c\u00e1c s\u1ef1 c\u1ed1 ph\u1ea7n m\u1ec1m.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e2u h\u1ecfi 3: T\u00f4i c\u00f3 th\u1ec3 tr\u1ed9n c\u00e1c th\u01b0\u01a1ng hi\u1ec7u SFP kh\u00e1c nhau kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f3, trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p. Hai m\u00f4-\u0111un SFP c\u1ee7a hai th\u01b0\u01a1ng hi\u1ec7u kh\u00e1c nhau c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau n\u1ebfu:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed1c \u0111\u1ed9 kh\u1edbp nhau<\/p><\/li><li><p>B\u01b0\u1edbc s\u00f3ng kh\u1edbp nhau<\/p><\/li><li><p>Ti\u00eau chu\u1ea9n Ethernet kh\u1edbp nhau<\/p><\/li><li><p>C\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch cho ph\u00e9p s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb quang h\u1ecdc c\u1ee7a b\u00ean th\u1ee9 ba<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean, c\u00e1c h\u1ea1n ch\u1ebf v\u1ec1 t\u01b0\u01a1ng th\u00edch c\u1ee7a nh\u00e0 cung c\u1ea5p v\u1eabn c\u00f3 th\u1ec3 g\u00e2y ra v\u1ea5n \u0111\u1ec1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e2u h\u1ecfi 4: S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa SFP v\u00e0 SFP+ l\u00e0 g\u00ec?<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 269px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"269\"><p>Lo\u1ea1i<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>T\u1ed1c \u0111\u1ed9 \u0111i\u1ec3n h\u00ecnh<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"269\"><p>SFP<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>1GbE<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"269\"><p>SFP+<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>10GbE<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">SFP+ h\u1ed7 tr\u1ee3 b\u0103ng th\u00f4ng cao h\u01a1n v\u00e0 y\u00eau c\u1ea7u t\u00edn hi\u1ec7u nghi\u00eam ng\u1eb7t h\u01a1n. M\u1eb7c d\u00f9 h\u00ecnh d\u1ea1ng v\u1eadt l\u00fd t\u01b0\u01a1ng t\u1ef1 nhau, nh\u01b0ng kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c c\u1ed5ng \u0111\u1ec1u h\u1ed7 tr\u1ee3 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch ng\u01b0\u1ee3c.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e2u h\u1ecfi 5: T\u1ea1i sao li\u00ean k\u1ebft SFP c\u1ee7a t\u00f4i c\u1ee9 nh\u1ea5p nh\u00e1y li\u00ean t\u1ee5c?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ea7u n\u1ed1i c\u00e1p quang b\u1ea9n<\/p><\/li><li><p>C\u00f4ng su\u1ea5t quang y\u1ebfu<\/p><\/li><li><p>Kh\u00f4ng kh\u1edbp FEC<\/p><\/li><li><p>C\u00e1p DAC ch\u1ea5t l\u01b0\u1ee3ng k\u00e9m<\/p><\/li><li><p>M\u00f4-\u0111un SFP RJ45 b\u1ecb qu\u00e1 nhi\u1ec7t<\/p><\/li><li><p>K\u1ebft n\u1ed1i v\u1eadt l\u00fd kh\u00f4ng \u1ed5n \u0111\u1ecbnh<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea5p nh\u00e1y li\u00ean k\u1ebft th\u01b0\u1eddng cho th\u1ea5y t\u00edn hi\u1ec7u kh\u00f4ng \u1ed5n \u0111\u1ecbnh \u1edf t\u1ea7ng v\u1eadt l\u00fd.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e2u h\u1ecfi 6: Li\u00ean k\u1ebft SFP c\u00f3 th\u1ec3 \u0111\u1ea1t kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a bao xa?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a ph\u1ee5 thu\u1ed9c v\u00e0o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><p>Switch model support list<\/p><\/p><\/li><li><p>B\u01b0\u1edbc s\u00f3ng quang h\u1ecdc<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-plus-mas-specification-10g-sfp-guide\/\">Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a b\u1ed9 thu ph\u00e1t<\/a><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh:<\/p>\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>Ti\u00eau chu\u1ea9n<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Lo\u1ea1i s\u1ee3i<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Kho\u1ea3ng c\u00e1ch<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>10GBASE-SR<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110a mode<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>L\u00ean \u0111\u1ebfn 300 m<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>10GBASE-LR<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u01a1n ch\u1ebf \u0111\u1ed9<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>L\u00ean t\u1edbi 10 km<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u1ed9 thu ph\u00e1t quang cho kho\u1ea3ng c\u00e1ch xa h\u01a1n c\u0169ng c\u00f3 s\u1eb5n d\u00e0nh cho m\u1ea1ng \u0111\u00f4 th\u1ecb v\u00e0 vi\u1ec5n th\u00f4ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e2u h\u1ecfi 7: C\u00e1c m\u00f4-\u0111un SFP RJ45 c\u00f3 \u0111\u1ed9 tin c\u1eady kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un SFP RJ45 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t trong c\u00e1c tri\u1ec3n khai \u0111\u1ed3ng tr\u1ee5c ng\u1eafn, \u0111\u1eb7c bi\u1ec7t trong m\u00f4i tr\u01b0\u1eddng doanh nghi\u1ec7p nh\u1ecf v\u00e0 v\u1eeba (SMB). Tuy nhi\u00ean, so v\u1edbi c\u00e1c b\u1ed9 thu ph\u00e1t quang, ch\u00fang th\u01b0\u1eddng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Sinh nhi\u1ec7t nhi\u1ec1u h\u01a1n<\/p><\/li><li><p>Ti\u00eau th\u1ee5 nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng h\u01a1n<\/p><\/li><li><p>C\u00f3 y\u00eau c\u1ea7u t\u01b0\u01a1ng th\u00edch nghi\u00eam ng\u1eb7t h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi c\u00e1c m\u00f4i tr\u01b0\u1eddng m\u1eadt \u0111\u1ed9 cao ho\u1eb7c b\u0103ng th\u00f4ng cao trong th\u1eddi gian d\u00e0i, c\u00e1p quang th\u01b0\u1eddng \u1ed5n \u0111\u1ecbnh h\u01a1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e2u h\u1ecfi 8: DOM trong m\u00f4-\u0111un SFP l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DOM l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a <strong>Gi\u00e1m s\u00e1t quang h\u1ecdc k\u1ef9 thu\u1eadt s\u1ed1<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00f3 cho ph\u00e9p k\u1ef9 s\u01b0 m\u1ea1ng gi\u00e1m s\u00e1t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t quang TX<\/p><\/li><li><p>C\u00f4ng su\u1ea5t quang RX<\/p><\/li><li><p>Nhi\u1ec7t \u0111\u1ed9<\/p><\/li><li><p>\u0110i\u1ec7n \u00e1p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">D\u1eef li\u1ec7u DOM c\u1ef1c k\u1ef3 h\u1eefu \u00edch \u0111\u1ec3 ch\u1ea9n \u0111o\u00e1n c\u00e1c s\u1ef1 c\u1ed1 li\u00ean k\u1ebft SFP x\u1ea3y ra ng\u1eaft qu\u00e3ng tr\u01b0\u1edbc khi x\u1ea3y ra h\u1ecfng ho\u00e0n to\u00e0n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udfe0 K\u1ebft lu\u1eadn: C\u00e1ch nhanh nh\u1ea5t \u0111\u1ec3 \u1ed5n \u0111\u1ecbnh m\u1ed9t li\u00ean k\u1ebft SFP<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch nhanh nh\u1ea5t \u0111\u1ec3 \u1ed5n \u0111\u1ecbnh m\u1ed9t li\u00ean k\u1ebft SFP l\u00e0 t\u1eadp trung v\u00e0o t\u1ea7ng v\u1eadt l\u00fd tr\u01b0\u1edbc ti\u00ean. Trong h\u1ea7u h\u1ebft c\u00e1c tri\u1ec3n khai th\u1ef1c t\u1ebf, c\u00e1c li\u00ean k\u1ebft kh\u00f4ng \u1ed5n \u0111\u1ecbnh th\u01b0\u1eddng do s\u1ef1 kh\u00f4ng t\u01b0\u01a1ng th\u00edch gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n, k\u1ebft n\u1ed1i c\u00e1p quang sai, ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u quang k\u00e9m ho\u1eb7c s\u1eed d\u1ee5ng b\u1ed9 thu ph\u00e1t ch\u1ea5t l\u01b0\u1ee3ng th\u1ea5p \u2014 ch\u1ee9 kh\u00f4ng ph\u1ea3i do c\u00e1c giao th\u1ee9c m\u1ea1ng \u1edf t\u1ea7ng cao h\u01a1n. M\u1ed9t quy tr\u00ecnh <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-troubleshooting-quick-checklist\/\">Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1<\/a> c\u00f3 c\u1ea5u tr\u00fac k\u1ebft h\u1ee3p v\u1edbi c\u00e1c b\u1ed9 thu ph\u00e1t \u0111\u00e1ng tin c\u1eady l\u00e0 gi\u1ea3i ph\u00e1p hi\u1ec7u qu\u1ea3 nh\u1ea5t v\u1ec1 l\u00e2u d\u00e0i.<\/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\/41d8d86f01ca4e0a91d918d837e7bffa.jpg\" alt=\"The Fastest Way to Stabilize an SFP Link\" class=\"wp-image-7300\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/41d8d86f01ca4e0a91d918d837e7bffa.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/41d8d86f01ca4e0a91d918d837e7bffa-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/41d8d86f01ca4e0a91d918d837e7bffa-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/41d8d86f01ca4e0a91d918d837e7bffa-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/41d8d86f01ca4e0a91d918d837e7bffa-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110i\u1ec1u h\u01b0\u1edbng d\u1eabn n\u00e0y ti\u1ebft l\u1ed9 v\u1ec1 c\u00e1c s\u1ef1 c\u1ed1 li\u00ean k\u1ebft SFP<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong su\u1ed1t h\u01b0\u1edbng d\u1eabn n\u00e0y, m\u1ed9t m\u1eabu l\u1eb7p l\u1ea1i nhi\u1ec1u l\u1ea7n:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Ph\u1ea7n l\u1edbn c\u00e1c s\u1ef1 c\u1ed1 li\u00ean k\u1ebft SFP \u0111\u1ec1u c\u00f3 th\u1ec3 ph\u00f2ng ng\u1eeba \u0111\u01b0\u1ee3c.<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00f9 v\u1ea5n \u0111\u1ec1 l\u00e0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft b\u1ecb ng\u1eaft<\/p><\/li><li><p>Nh\u1ea5p nh\u00e1y li\u00ean k\u1ebft<\/p><\/li><li><p>L\u1ed7i CRC\/FCS<\/p><\/li><li><p>M\u1ea5t g\u00f3i tin<\/p><\/li><li><p>B\u1ea5t \u1ed5n quang h\u1ecdc<\/p><\/li><li><p>M\u00f4-\u0111un SFP RJ45 qu\u00e1 nhi\u1ec7t<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u2026nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 th\u01b0\u1eddng b\u1eaft ngu\u1ed3n t\u1eeb:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c v\u1ea5n \u0111\u1ec1 t\u00edn hi\u1ec7u \u1edf t\u1ea7ng v\u1eadt l\u00fd<\/p><\/li><li><p>C\u00e1c m\u00f4-\u0111un kh\u00f4ng t\u01b0\u01a1ng th\u00edch<\/p><\/li><li><p>Ch\u1ea5t l\u01b0\u1ee3ng c\u00e1p k\u00e9m<\/p><\/li><li><p>C\u00e0i \u0111\u1eb7t FEC ho\u1eb7c t\u1ed1c \u0111\u1ed9 sai<\/p><\/li><li><p>\u0110\u1ea7u n\u1ed1i c\u00e1p quang b\u1ecb nhi\u1ec5m b\u1ea9n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 l\u00fd do v\u00ec sao c\u00e1c k\u1ef9 s\u01b0 m\u1ea1ng gi\u00e0u kinh nghi\u1ec7m lu\u00f4n ch\u1ea9n \u0111o\u00e1n s\u1ef1 c\u1ed1 t\u1eeb t\u1ea7ng 1 tr\u1edf l\u00ean, thay v\u00ec b\u1eaft \u0111\u1ea7u t\u1eeb c\u00e1c ch\u1ea9n \u0111o\u00e1n \u1edf t\u1ea7ng \u0111\u1ecbnh tuy\u1ebfn ho\u1eb7c \u1ee9ng d\u1ee5ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t quan tr\u1ecdng nh\u1ea5t<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh l\u00e2u d\u00e0i cho li\u00ean k\u1ebft SFP, h\u00e3y \u01b0u ti\u00ean c\u00e1c th\u1ef1c h\u00e0nh sau:<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 341px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"341\"><p>Th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>V\u00ec sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"341\"><p>S\u1eed d\u1ee5ng c\u00e1c b\u1ed9 thu ph\u00e1t t\u01b0\u01a1ng th\u00edch<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ng\u0103n ng\u1eeba xung \u0111\u1ed9t nh\u00e0 cung c\u1ea5p v\u00e0 EEPROM<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"341\"><p>\u0110\u1ed3ng b\u1ed9 h\u00f3a c\u00e0i \u0111\u1eb7t t\u1ed1c \u0111\u1ed9 v\u00e0 FEC<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Tr\u00e1nh c\u00e1c th\u1ea5t b\u1ea1i trong qu\u00e1 tr\u00ecnh th\u01b0\u01a1ng l\u01b0\u1ee3ng<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"341\"><p>L\u00e0m s\u1ea1ch c\u00e1c \u0111\u1ea7u n\u1ed1i s\u1ee3i quang<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Gi\u1ea3m suy hao v\u00e0 l\u1ed7i CRC<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"341\"><p>Gi\u00e1m s\u00e1t c\u00e1c gi\u00e1 tr\u1ecb DOM<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ph\u00e1t hi\u1ec7n s\u1edbm s\u1ef1 suy gi\u1ea3m t\u00edn hi\u1ec7u<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"341\"><p>S\u1eed d\u1ee5ng c\u00e1p DAC\/c\u00e1p quang ch\u1ea5t l\u01b0\u1ee3ng cao<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u1ea3i thi\u1ec7n \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"341\"><p>Ki\u1ec3m so\u00e1t \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ng\u0103n ng\u1eeba qu\u00e1 nhi\u1ec7t v\u00e0 vi\u1ec7c thi\u1ebft l\u1eadp l\u1ea1i li\u00ean k\u1ebft<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c m\u00f4i tr\u01b0\u1eddng Ethernet hi\u1ec7n \u0111\u1ea1i 10G, 25G v\u00e0 100G, \u0111\u1ed9 tin c\u1eady \u1edf t\u1ea7ng v\u1eadt l\u00fd tr\u1ef1c ti\u1ebfp \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u n\u0103ng t\u1ed5ng th\u1ec3 v\u00e0 th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ea1ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Vi\u1ec7c l\u1ef1a ch\u1ecdn c\u00e1c m\u00f4-\u0111un SFP \u0111\u00e1ng tin c\u1eady l\u00e0 r\u1ea5t quan tr\u1ecdng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Khi c\u00e1c m\u1ea1ng doanh nghi\u1ec7p, c\u1ee5m AI v\u00e0 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y ng\u00e0y c\u00e0ng h\u01b0\u1edbng t\u1edbi m\u1eadt \u0111\u1ed9 b\u0103ng th\u00f4ng cao h\u01a1n, ch\u1ea5t l\u01b0\u1ee3ng b\u1ed9 thu ph\u00e1t ng\u00e0y c\u00e0ng tr\u1edf n\u00ean quan tr\u1ecdng. C\u00e1c b\u1ed9 thu ph\u00e1t quang ch\u1ea5t l\u01b0\u1ee3ng th\u1ea5p c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng trong giai \u0111o\u1ea1n l\u1eafp \u0111\u1eb7t nh\u01b0ng th\u01b0\u1eddng g\u00e2y ra s\u1ef1 b\u1ea5t \u1ed5n ng\u1eaft qu\u00e3ng d\u01b0\u1edbi t\u1ea3i l\u00e0m vi\u1ec7c k\u00e9o d\u00e0i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ec l\u00fd do n\u00e0y, nhi\u1ec1u \u0111\u1ed9i ng\u0169 CNTT hi\u1ec7n nay \u0111ang ti\u00eau chu\u1ea9n h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u1ed9 thu ph\u00e1t quang t\u01b0\u01a1ng th\u00edch v\u1edbi nh\u00e0 cung c\u1ea5p thi\u1ebft b\u1ecb<\/p><\/li><li><p>Quy tr\u00ecnh ki\u1ec3m tra quang h\u1ecdc nghi\u00eam ng\u1eb7t<\/p><\/li><li><p>Gi\u00e1m s\u00e1t d\u1ef1a tr\u00ean DOM<\/p><\/li><li><p>Nh\u00e0 cung c\u1ea5p b\u1ed9 thu ph\u00e1t c\u1ea5p doanh nghi\u1ec7p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea1n \u0111ang l\u00ean k\u1ebf ho\u1ea1ch tri\u1ec3n khai m\u1edbi ho\u1eb7c thay th\u1ebf c\u00e1c m\u00f4-\u0111un kh\u00f4ng \u1ed5n \u0111\u1ecbnh, <a target=\"_self\" href=\"https:\/\/www.l-p.com\/\">C\u1eeda h\u00e0ng Ch\u00ednh th\u1ee9c LINK-PP<\/a> cung c\u1ea5p m\u1ed9t lo\u1ea1t gi\u1ea3i ph\u00e1p SFP, SFP+, c\u00e1p DAC v\u00e0 m\u1ea1ng quang h\u1ecdc t\u01b0\u01a1ng th\u00edch, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf d\u00e0nh ri\u00eang cho m\u00f4i tr\u01b0\u1eddng doanh nghi\u1ec7p, c\u00f4ng nghi\u1ec7p v\u00e0 trung t\u00e2m d\u1eef li\u1ec7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >K\u1ebft lu\u1eadn cu\u1ed1i c\u00f9ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t li\u00ean k\u1ebft SFP kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 ch\u1ec9 b\u00e1o \u201cli\u00ean k\u1ebft b\u1eadt\u201d. N\u00f3 l\u00e0 n\u1ec1n t\u1ea3ng cho vi\u1ec7c truy\u1ec1n th\u00f4ng Ethernet \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi t\u00ednh t\u01b0\u01a1ng th\u00edch, \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng quang h\u1ecdc \u0111\u01b0\u1ee3c x\u1eed l\u00fd \u0111\u00fang c\u00e1ch:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c li\u00ean k\u1ebft tr\u1edf n\u00ean \u1ed5n \u0111\u1ecbnh h\u01a1n<\/p><\/li><li><p>T\u1ed5n th\u1ea5t g\u00f3i tin gi\u1ea3m \u0111i<\/p><\/li><li><p>C\u00e1c l\u1ed7i CRC\/FCS \u0111\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u<\/p><\/li><li><p>Th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ea1ng \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i t\u1ed1c \u0111\u1ed9 cao, kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i \u1ed5n \u0111\u1ecbnh \u1edf t\u1ea7ng v\u1eadt l\u00fd kh\u00f4ng c\u00f2n l\u00e0 l\u1ef1a ch\u1ecdn \u2014 m\u00e0 l\u00e0 h\u1ea1 t\u1ea7ng then ch\u1ed1t.<\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u li\u00ean k\u1ebft SFP l\u00e0 g\u00ec, l\u00fd do th\u1ea5t b\u1ea1i v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 t\u01b0\u01a1ng th\u00edch, c\u00e1p v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t li\u00ean k\u1ebft (link-flap) th\u00f4ng qua c\u00e1c ki\u1ec3m tra th\u1ef1c t\u1ebf v\u00e0 b\u01b0\u1edbc r\u00f5 r\u00e0ng.<\/p>","protected":false},"author":1,"featured_media":7301,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[14,15,26],"class_list":["post-7302","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-10g-sfp-transceivers","tag-link-pp-1g-sfp-modules","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/7302","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=7302"}],"version-history":[{"count":9,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/7302\/revisions"}],"predecessor-version":[{"id":10683,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/7302\/revisions\/10683"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/7301"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=7302"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=7302"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=7302"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}