{"id":2878,"date":"2026-03-11T00:00:00","date_gmt":"2026-03-11T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/how-to-check-sfp-module-cisco-commands-testing-guide\/"},"modified":"2026-06-22T04:01:05","modified_gmt":"2026-06-22T04:01:05","slug":"how-to-check-sfp-module-cisco-commands-testing-guide","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/how-to-check-sfp-module-cisco-commands-testing-guide","title":{"rendered":"C\u00e1ch ki\u1ec3m tra m\u00f4-\u0111un SFP: Ki\u1ec3m tra v\u00e0 ki\u1ec3m tra t\u00ednh 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\/e333f406b4a145d5abbf88e1a5ffe8a8.jpg\" alt=\"How to Check SFP Module\" class=\"wp-image-2867\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e333f406b4a145d5abbf88e1a5ffe8a8.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e333f406b4a145d5abbf88e1a5ffe8a8-300x157.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e333f406b4a145d5abbf88e1a5ffe8a8-1024x536.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e333f406b4a145d5abbf88e1a5ffe8a8-768x402.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e333f406b4a145d5abbf88e1a5ffe8a8-18x9.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c m\u1ea1ng s\u1ee3i quang hi\u1ec7n \u0111\u1ea1i, <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\"><strong>C\u00e1c m\u00f4-\u0111un SFP<\/strong><\/a><strong> (B\u1ed9 thu ph\u00e1t d\u1ea1ng nh\u1ecf c\u00f3 th\u1ec3 c\u1eafm n\u00f3ng \u2013 SFP)<\/strong> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i \u0111\u1ec3 k\u1ebft n\u1ed1i c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn v\u00e0 m\u00e1y ch\u1ee7 v\u1edbi c\u00e1p s\u1ee3i quang ho\u1eb7c c\u00e1p \u0111\u1ed3ng. Nh\u1eefng b\u1ed9 thu ph\u00e1t quang nh\u1ecf g\u1ecdn, c\u00f3 th\u1ec3 c\u1eafm n\u00f3ng n\u00e0y cho ph\u00e9p k\u1ef9 s\u01b0 m\u1ea1ng linh ho\u1ea1t l\u1ef1a ch\u1ecdn c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n truy\u1ec1n d\u1eabn, b\u01b0\u1edbc s\u00f3ng v\u00e0 kho\u1ea3ng c\u00e1ch kh\u00e1c nhau m\u00e0 kh\u00f4ng c\u1ea7n thay th\u1ebf to\u00e0n b\u1ed9 ph\u1ea7n c\u1ee9ng giao di\u1ec7n m\u1ea1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ec c\u00e1c m\u00f4-\u0111un SFP \u0111\u00f3ng vai tr\u00f2 l\u00e0 giao di\u1ec7n v\u1eadt l\u00fd gi\u1eefa thi\u1ebft b\u1ecb m\u1ea1ng v\u00e0 ph\u01b0\u01a1ng ti\u1ec7n truy\u1ec1n d\u1eabn, vi\u1ec7c x\u00e1c minh r\u1eb1ng m\u00f4-\u0111un \u0111\u00e3 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t \u0111\u00fang c\u00e1ch v\u00e0 \u0111ang ho\u1ea1t \u0111\u1ed9ng trong gi\u1edbi h\u1ea1n th\u00f4ng s\u1ed1 quang h\u1ecdc c\u1ee7a n\u00f3 l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu nh\u1eb1m duy tr\u00ec k\u1ebft n\u1ed1i m\u1ea1ng \u1ed5n \u0111\u1ecbnh. M\u1ed9t m\u00f4-\u0111un SFP b\u1ecb c\u1ea5u h\u00ecnh sai ho\u1eb7c l\u1ed7i c\u00f3 th\u1ec3 g\u00e2y ra c\u00e1c s\u1ef1 c\u1ed1 ph\u1ed5 bi\u1ebfn nh\u01b0 <strong>m\u1ea5t li\u00ean k\u1ebft, c\u00f4ng su\u1ea5t quang th\u1ea5p, t\u1ef7 l\u1ec7 l\u1ed7i cao ho\u1eb7c kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi b\u1ed9 chuy\u1ec3n m\u1ea1ch ch\u1ee7<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ec l\u00fd do n\u00e0y, qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng th\u01b0\u1eddng c\u1ea7n ph\u1ea3i <strong>ki\u1ec3m tra c\u00e1c m\u00f4-\u0111un SFP b\u1eb1ng ch\u1ea9n \u0111o\u00e1n tr\u00ean b\u1ed9 chuy\u1ec3n m\u1ea1ch, c\u00e1c c\u00f4ng c\u1ee5 d\u00f2ng l\u1ec7nh v\u00e0 d\u1eef li\u1ec7u gi\u00e1m s\u00e1t quang h\u1ecdc<\/strong>. Nhi\u1ec1u b\u1ed9 chuy\u1ec3n m\u1ea1ch doanh nghi\u1ec7p t\u1eeb c\u00e1c nh\u00e0 cung c\u1ea5p nh\u01b0 Cisco v\u00e0 Juniper Networks cung c\u1ea5p c\u00e1c l\u1ec7nh t\u00edch h\u1ee3p cho ph\u00e9p k\u1ef9 s\u01b0 \u0111\u1ecdc <strong>Gi\u00e1m s\u00e1t quang h\u1ecdc k\u1ef9 thu\u1eadt s\u1ed1<\/strong> (th\u00f4ng tin DOM ho\u1eb7c DDM) nh\u01b0 nhi\u1ec7t \u0111\u1ed9, \u0111i\u1ec7n \u00e1p, c\u00f4ng su\u1ea5t ph\u00e1t v\u00e0 c\u00f4ng su\u1ea5t nh\u1eadn. C\u00e1c gi\u00e1 tr\u1ecb ch\u1ea9n \u0111o\u00e1n n\u00e0y gi\u00fap x\u00e1c \u0111\u1ecbnh xem b\u1ed9 thu ph\u00e1t c\u00f3 \u0111ang ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang hay kh\u00f4ng, ho\u1eb7c \u0111\u00e3 ti\u1ebfn g\u1ea7n \u0111\u1ebfn ng\u01b0\u1ee1ng c\u1ea3nh b\u00e1o ch\u01b0a.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00ean th\u1ef1c t\u1ebf, vi\u1ec7c ki\u1ec3m tra m\u1ed9t m\u00f4-\u0111un SFP th\u01b0\u1eddng bao g\u1ed3m nhi\u1ec1u b\u01b0\u1edbc:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c \u0111\u1ecbnh m\u1eabu b\u1ed9 thu ph\u00e1t \u0111\u00e3 l\u1eafp \u0111\u1eb7t<\/p><\/li>\n\n\n\n<li><p>X\u00e1c minh tr\u1ea1ng th\u00e1i li\u00ean k\u1ebft v\u00e0 th\u00f4ng tin giao di\u1ec7n<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ecdc d\u1eef li\u1ec7u ch\u1ea9n \u0111o\u00e1n quang h\u1ecdc DOM\/DDM<\/p><\/li>\n\n\n\n<li><p>X\u00e1c nh\u1eadn t\u00ednh t\u01b0\u01a1ng th\u00edch v\u1edbi b\u1ed9 chuy\u1ec3n m\u1ea1ch v\u00e0 c\u00e1c b\u1ed9 thu ph\u00e1t quang \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li>\n\n\n\n<li><p>Ki\u1ec3m tra m\u00f4-\u0111un b\u1eb1ng c\u00e1c k\u1ebft n\u1ed1i s\u1ee3i quang \u0111\u00e3 bi\u1ebft l\u00e0 t\u1ed1t<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec3u c\u00e1ch th\u1ee9c ki\u1ec3m tra v\u00e0 th\u1eed nghi\u1ec7m c\u00e1c m\u00f4-\u0111un SFP m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c <strong>do \u0111\u00f3 l\u00e0 m\u1ed9t k\u1ef9 n\u0103ng thi\u1ebft y\u1ebfu \u0111\u1ed1i v\u1edbi k\u1ef9 s\u01b0 m\u1ea1ng, ng\u01b0\u1eddi v\u1eadn h\u00e0nh trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 qu\u1ea3n tr\u1ecb vi\u00ean CNTT ch\u1ecbu tr\u00e1ch nhi\u1ec7m duy tr\u00ec c\u00e1c li\u00ean k\u1ebft s\u1ee3i quang t\u1ed1c \u0111\u1ed9 cao.<\/strong> Nh\u1eefng n\u1ed9i dung b\u1ea1n s\u1ebd h\u1ecdc trong h\u01b0\u1edbng d\u1eabn n\u00e0y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u1ea1n S\u1ebd H\u1ecdc \u0110\u01b0\u1ee3c G\u00ec Trong H\u01b0\u1edbng D\u1eabn N\u00e0y<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n s\u1ebd t\u00ecm hi\u1ec3u:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1ch ki\u1ec3m tra m\u1ed9t<\/p><\/li>\n\n\n\n<li><p>b\u1eb1ng ch\u1ea9n \u0111o\u00e1n v\u00e0 \u0111o l\u01b0\u1eddng quang h\u1ecdc <a href=\"https:\/\/www.l-p.com\/products\/476756.htm\" target=\"_self\">B\u1ed9 thu ph\u00e1t SFP<\/a> C\u00e1ch \u0111\u1ecdc c\u00e1c th\u00f4ng s\u1ed1 DOM\/DDM c\u1ee7a SFP nh\u01b0 c\u00f4ng su\u1ea5t quang ph\u00e1t\/nh\u1eadn (TX\/RX)<\/p><\/li>\n\n\n\n<li><p>C\u00e1ch x\u00e1c \u0111\u1ecbnh m\u00f4-\u0111un SFP n\u00e0o<\/p><\/li>\n\n\n\n<li><p>\u0111\u01b0\u1ee3c y\u00eau c\u1ea7u cho m\u1ed9t li\u00ean k\u1ebft m\u1ea1ng c\u1ee5 th\u1ec3 <a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-types-overview-optical-copper-direct-attach-modules\/\" target=\"_blank\" rel=\"\">lo\u1ea1i m\u00f4-\u0111un SFP<\/a> C\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 ph\u1ed5 bi\u1ebfn khi m\u00f4-\u0111un SFP kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n ho\u1eb7c g\u1eb7p s\u1ef1 c\u1ed1<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ebfn cu\u1ed1i h\u01b0\u1edbng d\u1eabn n\u00e0y, b\u1ea1n s\u1ebd hi\u1ec3u c\u00e1ch nhanh ch\u00f3ng x\u00e1c minh, ch\u1ea9n \u0111o\u00e1n v\u00e0 l\u1ef1a ch\u1ecdn m\u00f4-\u0111un SFP ph\u00f9 h\u1ee3p nh\u1eb1m \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady c\u1ee7a m\u1ea1ng s\u1ee3i quang.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u27a1\ufe0f M\u00f4-\u0111un SFP l\u00e0 g\u00ec v\u00e0 t\u1ea1i sao vi\u1ec7c ki\u1ec3m tra n\u00f3 l\u1ea1i quan tr\u1ecdng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">M\u00f4-\u0111un SFP (b\u1ed9 thu ph\u00e1t d\u1ea1ng nh\u1ecf c\u00f3 th\u1ec3 c\u1eafm n\u00f3ng)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t <strong>l\u00e0 m\u1ed9t giao di\u1ec7n nh\u1ecf g\u1ecdn, c\u00f3 th\u1ec3 thay th\u1ebf n\u00f3ng, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn v\u00e0 m\u00e1y ch\u1ee7 \u0111\u1ec3 k\u1ebft n\u1ed1i thi\u1ebft b\u1ecb m\u1ea1ng v\u1edbi c\u00e1p s\u1ee3i quang ho\u1eb7c c\u00e1p \u0111\u1ed3ng. Ti\u00eau chu\u1ea9n SFP cho ph\u00e9p k\u1ef9 s\u01b0 m\u1ea1ng d\u1ec5 d\u00e0ng tri\u1ec3n khai c\u00e1c lo\u1ea1i truy\u1ec1n d\u1eabn kh\u00e1c nhau \u2014 ch\u1eb3ng h\u1ea1n nh\u01b0 s\u1ee3i \u0111a mode, s\u1ee3i \u0111\u01a1n mode ho\u1eb7c Ethernet \u0111\u1ed3ng \u2014 m\u00e0 kh\u00f4ng c\u1ea7n thay \u0111\u1ed5i ph\u1ea7n c\u1ee9ng m\u1ea1ng ch\u00ednh.<\/strong> C\u00e1c m\u00f4-\u0111un SFP \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong Gigabit Ethernet, 10-Gigabit Ethernet, Fibre Channel v\u00e0 c\u00e1c giao th\u1ee9c m\u1ea1ng t\u1ed1c \u0111\u1ed9 cao kh\u00e1c. V\u00ec ch\u00fang c\u00f3 th\u1ec3 th\u00e1o r\u1eddi v\u00e0 \u0111\u01b0\u1ee3c ti\u00eau chu\u1ea9n h\u00f3a theo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">, n\u00ean c\u00e1c b\u1ed9 thu ph\u00e1t SFP t\u1eeb c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t kh\u00e1c nhau th\u01b0\u1eddng c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng v\u1edbi thi\u1ebft b\u1ecb m\u1ea1ng t\u01b0\u01a1ng th\u00edch. <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/multi-source-agreements-optical-transceivers\/\"><strong>Th\u1ecfa thu\u1eadn \u0110a ngu\u1ed3n <\/strong><\/a><strong>(MSA)<\/strong>, Tuy nhi\u00ean, v\u00ec m\u00f4-\u0111un SFP \u0111\u00f3ng vai tr\u00f2 l\u00e0 giao di\u1ec7n l\u1edbp v\u1eadt l\u00fd gi\u1eefa c\u1ed5ng chuy\u1ec3n m\u1ea1ch v\u00e0 c\u00e1p m\u1ea1ng, b\u1ea5t k\u1ef3 s\u1ef1 c\u1ed1 n\u00e0o li\u00ean quan \u0111\u1ebfn m\u00f4-\u0111un \u0111\u1ec1u c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng ngay l\u1eadp t\u1ee9c \u0111\u1ebfn \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh v\u00e0 hi\u1ec7u n\u0103ng c\u1ee7a li\u00ean k\u1ebft. \u0110\u00e2y l\u00e0 l\u00fd do v\u00ec sao k\u1ef9 s\u01b0 m\u1ea1ng th\u01b0\u1eddng c\u1ea7n ph\u1ea3i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ki\u1ec3m tra tr\u1ea1ng th\u00e1i m\u00f4-\u0111un SFP <strong>, gi\u00e1m s\u00e1t c\u00e1c th\u00f4ng s\u1ed1 quang h\u1ecdc v\u00e0 x\u00e1c minh t\u00ednh t\u01b0\u01a1ng th\u00edch khi kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 m\u1ea1ng.<\/strong>, T\u1ea1i sao k\u1ef9 s\u01b0 l\u1ea1i ki\u1ec3m tra tr\u1ea1ng th\u00e1i m\u00f4-\u0111un SFP.<\/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\/a24000a3bc3e45428255531784fa48b6.jpg\" alt=\"What Is an SFP Module and Why Checking It Matters\" class=\"wp-image-2868\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a24000a3bc3e45428255531784fa48b6.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a24000a3bc3e45428255531784fa48b6-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a24000a3bc3e45428255531784fa48b6-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a24000a3bc3e45428255531784fa48b6-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a24000a3bc3e45428255531784fa48b6-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Vi\u1ec7c ki\u1ec3m tra m\u00f4-\u0111un SFP l\u00e0 m\u1ed9t t\u00e1c v\u1ee5 th\u01b0\u1eddng xuy\u00ean trong v\u1eadn h\u00e0nh m\u1ea1ng. K\u1ef9 s\u01b0 th\u01b0\u1eddng th\u1ef1c hi\u1ec7n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">ch\u1ea9n \u0111o\u00e1n SFP <strong>\u0111\u1ec3 x\u00e1c nh\u1eadn r\u1eb1ng b\u1ed9 thu ph\u00e1t \u0111ang ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang v\u00e0 li\u00ean k\u1ebft quang \u0111\u1ea1t m\u1ee9c hi\u1ec7u n\u0103ng mong \u0111\u1ee3i.<\/strong> C\u00e1c l\u00fd do ph\u1ed5 bi\u1ebfn \u0111\u1ec3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ki\u1ec3m tra m\u00f4-\u0111un SFP <strong>X\u00e1c minh r\u1eb1ng b\u1ed9 chuy\u1ec3n m\u1ea1ch<\/strong> include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>ph\u00e1t hi\u1ec7n \u0111\u00fang m\u00f4-\u0111un SFP <strong>Ki\u1ec3m tra <\/strong><a href=\"https:\/\/www.l-p.com\/products\/488474.htm\" target=\"_self\"><strong>B\u1ed9 thu ph\u00e1t SFP<\/strong><\/a><\/p><\/li>\n\n\n\n<li><p>tr\u1ea1ng th\u00e1i li\u00ean k\u1ebft v\u00e0 ho\u1ea1t \u0111\u1ed9ng giao di\u1ec7n <strong>\u0110\u1ecdc c\u00e1c gi\u00e1 tr\u1ecb<\/strong><\/p><\/li>\n\n\n\n<li><p>Gi\u00e1m s\u00e1t quang h\u1ecdc k\u1ef9 thu\u1eadt s\u1ed1 (DOM\/DDM) <strong>nh\u01b0 c\u00f4ng su\u1ea5t quang ph\u00e1t v\u00e0 nh\u1eadn<\/strong> X\u00e1c nh\u1eadn t\u00ednh t\u01b0\u01a1ng th\u00edch<\/p><\/li>\n\n\n\n<li><p>v\u1edbi b\u1ed9 chuy\u1ec3n m\u1ea1ch m\u1ea1ng <strong>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m: <\/strong><a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/how-to-test-sfp-compatibility\/\" target=\"_blank\" rel=\"\"><strong>t\u01b0\u01a1ng th\u00edch<\/strong><\/a><strong> Nh\u1eadn di\u1ec7n c\u00e1c \u0111i\u1ec1u ki\u1ec7n b\u1ea5t th\u01b0\u1eddng v\u1ec1 nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c \u0111i\u1ec7n \u00e1p<\/strong><\/p><\/li>\n\n\n\n<li><p>H\u1ea7u h\u1ebft c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch m\u1ea1ng doanh nghi\u1ec7p \u0111\u1ec1u cung c\u1ea5p c\u00e1c l\u1ec7nh t\u00edch h\u1ee3p cho ph\u00e9p qu\u1ea3n tr\u1ecb vi\u00ean th\u1ef1c hi\u1ec7n ch\u1ea9n \u0111o\u00e1n SFP tr\u1ef1c ti\u1ebfp t\u1eeb CLI, nh\u1edd \u0111\u00f3 vi\u1ec7c ph\u00e1t hi\u1ec7n c\u00e1c s\u1ef1 c\u1ed1 ph\u1ea7n c\u1ee9ng ho\u1eb7c quang h\u1ecdc tr\u1edf n\u00ean d\u1ec5 d\u00e0ng h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n c\u00e1c c\u00f4ng c\u1ee5 chuy\u00ean d\u1ee5ng b\u00ean ngo\u00e0i.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c s\u1ef1 c\u1ed1 m\u1ea1ng ph\u1ed5 bi\u1ebfn li\u00ean quan \u0111\u1ebfn m\u00f4-\u0111un SFP.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Nhi\u1ec1u s\u1ef1 c\u1ed1 m\u1ea1ng s\u1ee3i quang c\u00f3 li\u00ean h\u1ec7 tr\u1ef1c ti\u1ebfp v\u1edbi b\u1ed9 thu ph\u00e1t ho\u1eb7c k\u1ebft n\u1ed1i c\u1ee7a n\u00f3 v\u1edbi c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ee3i quang. Khi kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 m\u1ea5t k\u1ebft n\u1ed1i m\u1ea1ng ho\u1eb7c li\u00ean k\u1ebft kh\u00f4ng \u1ed5n \u0111\u1ecbnh, k\u1ef9 s\u01b0 th\u01b0\u1eddng b\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c ki\u1ec3m tra m\u00f4-\u0111un SFP.<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 s\u1ef1 c\u1ed1 ph\u1ed5 bi\u1ebfn nh\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">li\u00ean quan \u0111\u1ebfn SFP <strong>M\u00f4-\u0111un kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/strong> include:<\/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>V\u1ea5n \u0111\u1ec1<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>M\u00f4 t\u1ea3<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"290\"><p>Ph\u1ea7n\u56fa\u4ef6 b\u1ed9 chuy\u1ec3n m\u1ea1ch c\u00f3 th\u1ec3 t\u1eeb ch\u1ed1i c\u00e1c m\u00f4-\u0111un SFP kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t ho\u1eb7c kh\u00f4ng t\u01b0\u01a1ng th\u00edch<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u00edn hi\u1ec7u nh\u1eadn y\u1ebfu do kho\u1ea3ng c\u00e1ch qu\u00e1 xa, \u0111\u1ea7u n\u1ed1i b\u1ea9n ho\u1eb7c s\u1ee3i quang b\u1ecb h\u01b0 h\u1ecfng<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"290\"><p>C\u00f4ng su\u1ea5t quang RX th\u1ea5p<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Sai lo\u1ea1i s\u1ee3i quang<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"290\"><p>S\u1eed d\u1ee5ng s\u1ee3i \u0111a mode v\u1edbi m\u00f4-\u0111un SFP<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0111\u01a1n mode <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476763.htm\">ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i <\/a>B\u1ee5i ho\u1eb7c ch\u1ea5t b\u1ea9n tr\u00ean \u0111\u1ea7u n\u1ed1i s\u1ee3i quang g\u00e2y suy hao t\u00edn hi\u1ec7u<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"290\"><p>\u0110\u1ea7u n\u1ed1i b\u1ea9n<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>S\u1ef1 c\u1ed1 ph\u1ea7n c\u1ee9ng<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"290\"><p>C\u00e1c m\u00f4-\u0111un SFP b\u1ecb l\u00e3o h\u00f3a ho\u1eb7c l\u1ed7i g\u00e2y m\u1ea5t li\u00ean k\u1ebft ng\u1eaft qu\u00e3ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>B\u1eb1ng c\u00e1ch th\u1ef1c hi\u1ec7n m\u1ed9t l\u1ea7n<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">ki\u1ec3m tra m\u00f4-\u0111un SFP nhanh ch\u00f3ng <strong>Ki\u1ec3m tra m\u00f4-\u0111un SFP<\/strong>, k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 nhanh ch\u00f3ng x\u00e1c \u0111\u1ecbnh v\u1ea5n \u0111\u1ec1 b\u1eaft ngu\u1ed3n t\u1eeb b\u1ed9 thu ph\u00e1t, c\u00e1p s\u1ee3i quang hay c\u1ea5u h\u00ecnh m\u1ea1ng, t\u1eeb \u0111\u00f3 gi\u1ea3m \u0111\u00e1ng k\u1ec3 th\u1eddi gian kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 trong trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 m\u1ea1ng doanh nghi\u1ec7p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Do \u0111\u00f3, vi\u1ec7c hi\u1ec3u c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c module SFP v\u00e0 c\u00e1ch ki\u1ec3m tra \u0111\u00fang c\u00e1ch ch\u1ea9n \u0111o\u00e1n SFP c\u0169ng nh\u01b0 tr\u1ea1ng th\u00e1i li\u00ean k\u1ebft l\u00e0 m\u1ed9t b\u01b0\u1edbc thi\u1ebft y\u1ebfu nh\u1eb1m duy tr\u00ec kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i m\u1ea1ng s\u1ee3i quang \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u27a1\ufe0f C\u00e1ch ki\u1ec3m tra module SFP tr\u00ean switch Cisco<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t trong nh\u1eefng c\u00e2u h\u1ecfi ph\u1ed5 bi\u1ebfn nh\u1ea5t trong v\u1eadn h\u00e0nh m\u1ea1ng l\u00e0 <strong>\u201cL\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ki\u1ec3m tra module SFP tr\u00ean switch Cisco?\u201d<\/strong> C\u00e1c thi\u1ebft b\u1ecb Cisco cung c\u1ea5p nhi\u1ec1u l\u1ec7nh CLI t\u00edch h\u1ee3p cho ph\u00e9p qu\u1ea3n tr\u1ecb vi\u00ean x\u00e1c minh xem module SFP \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t ch\u01b0a, nh\u1eadn di\u1ec7n m\u00f4 h\u00ecnh c\u1ee7a n\u00f3 v\u00e0 \u0111\u1ecdc th\u00f4ng tin ch\u1ea9n \u0111o\u00e1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c ki\u1ec3m tra module SFP tr\u00ean switch Cisco th\u01b0\u1eddng bao g\u1ed3m vi\u1ec7c xem tr\u1ea1ng th\u00e1i giao di\u1ec7n, x\u00e1c \u0111\u1ecbnh b\u1ed9 thu ph\u00e1t \u0111\u00e3 c\u00e0i \u0111\u1eb7t <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/blog\/how-to-install-an-sfp-module-step-by-step-guide.htm\">,<\/a>, v\u00e0 \u0111\u1ecdc ch\u1ea9n \u0111o\u00e1n quang h\u1ecdc (d\u1eef li\u1ec7u DOM\/DDM). Nh\u1eefng l\u1ec7nh n\u00e0y gi\u00fap k\u1ef9 s\u01b0 nhanh ch\u00f3ng x\u00e1c \u0111\u1ecbnh li\u1ec7u s\u1ef1 c\u1ed1 li\u00ean k\u1ebft c\u00f3 li\u00ean quan \u0111\u1ebfn module SFP, c\u00e1p s\u1ee3i quang hay c\u1ed5ng switch hay kh\u00f4ng.<\/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\/36e0699706fd43e4b45c1f6b6fdb4d49.jpg\" alt=\"How to Check an SFP Module on a Cisco Switch\" class=\"wp-image-2869\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/36e0699706fd43e4b45c1f6b6fdb4d49.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/36e0699706fd43e4b45c1f6b6fdb4d49-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/36e0699706fd43e4b45c1f6b6fdb4d49-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/36e0699706fd43e4b45c1f6b6fdb4d49-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/36e0699706fd43e4b45c1f6b6fdb4d49-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c l\u1ec7nh CLI Cisco ph\u1ed5 bi\u1ebfn nh\u1ea5t d\u00f9ng \u0111\u1ec3 ki\u1ec3m tra module SFP.<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 350px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"350\"><p>L\u1ec7nh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>M\u1ee5c \u0111\u00edch<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"350\"><p><code>show interface status<\/code><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Hi\u1ec3n th\u1ecb tr\u1ea1ng th\u00e1i c\u1ed5ng, tr\u1ea1ng th\u00e1i li\u00ean k\u1ebft, t\u1ed1c \u0111\u1ed9 v\u00e0 vi\u1ec7c ph\u00e1t hi\u1ec7n module SFP<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"350\"><p><code>show inventory<\/code><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Li\u1ec7t k\u00ea t\u1ea5t c\u1ea3 c\u00e1c th\u00e0nh ph\u1ea7n ph\u1ea7n c\u1ee9ng, bao g\u1ed3m c\u1ea3 <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-25832-1-2-4g-transceiver-modules.htm\">SFP c\u1ee7a b\u00ean th\u1ee9 ba<\/a> v\u00e0 s\u1ed1 hi\u1ec7u m\u00f4 h\u00ecnh c\u1ee7a ch\u00fang<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"350\"><p><code>show interfaces transceiver<br><\/code><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Hi\u1ec3n th\u1ecb th\u00f4ng tin c\u01a1 b\u1ea3n v\u1ec1 SFP nh\u01b0 tr\u1ea1ng th\u00e1i hi\u1ec7n di\u1ec7n v\u00e0 lo\u1ea1i<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"350\"><p><code>show interfaces transceiver detail<\/code><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Hi\u1ec3n th\u1ecb ch\u1ea9n \u0111o\u00e1n quang h\u1ecdc chi ti\u1ebft bao g\u1ed3m nhi\u1ec7t \u0111\u1ed9, \u0111i\u1ec7n \u00e1p, c\u00f4ng su\u1ea5t ph\u00e1t (TX) v\u00e0 c\u00f4ng su\u1ea5t thu (RX)<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 1: Ki\u1ec3m tra tr\u1ea1ng th\u00e1i giao di\u1ec7n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u01b0\u1edbc \u0111\u1ea7u ti\u00ean khi x\u00e1c minh module SFP l\u00e0 ki\u1ec3m tra xem giao di\u1ec7n \u0111\u00e3 b\u1eadt v\u00e0 \u0111\u01b0\u1ee3c switch nh\u1eadn di\u1ec7n hay ch\u01b0a.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>show interface status<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1ec7nh n\u00e0y hi\u1ec3n th\u1ecb th\u00f4ng tin giao di\u1ec7n quan tr\u1ecdng nh\u01b0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Tr\u1ea1ng th\u00e1i c\u1ed5ng (connected \/ notconnect)<\/p><\/li>\n\n\n\n<li><p>T\u1ed1c \u0111\u1ed9 (1G \/ 10G)<\/p><\/li>\n\n\n\n<li><p>Ch\u1ebf \u0111\u1ed9 duplex<\/p><\/li>\n\n\n\n<li><p>Ph\u00e1t hi\u1ec7n m\u00f4-\u0111un<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu c\u1ed5ng hi\u1ec3n th\u1ecb <strong>\u201ckh\u00f4ng k\u1ebft n\u1ed1i\u201d<\/strong>, nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3 li\u00ean quan \u0111\u1ebfn c\u00e1p s\u1ee3i quang, thi\u1ebft b\u1ecb \u1edf xa ho\u1eb7c ch\u00ednh module SFP.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 2: X\u00e1c \u0111\u1ecbnh module SFP \u0111\u00e3 c\u00e0i \u0111\u1eb7t<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 x\u00e1c nh\u1eadn module thu ph\u00e1t SFP n\u00e0o \u0111ang \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t, k\u1ef9 s\u01b0 th\u01b0\u1eddng s\u1eed d\u1ee5ng:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>show inventory<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1ec7nh n\u00e0y li\u1ec7t k\u00ea <strong>m\u00f4 h\u00ecnh ph\u1ea7n c\u1ee9ng, th\u00f4ng tin nh\u00e0 cung c\u1ea5p v\u00e0 s\u1ed1 s\u00ea-ri<\/strong> c\u1ee7a c\u00e1c b\u1ed9 thu ph\u00e1t \u0111\u00e3 c\u00e0i \u0111\u1eb7t. N\u00f3 gi\u00fap x\u00e1c minh xem m\u00f4-\u0111un SFP \u0111\u00fang c\u00f3 \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng hay kh\u00f4ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 3: Ki\u1ec3m tra Ch\u1ea9n \u0111o\u00e1n Quang (DOM\/DDM)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 s\u00e2u h\u01a1n <strong>\u0111\u1ec3 x\u00e1c nh\u1eadn r\u1eb1ng b\u1ed9 thu ph\u00e1t \u0111ang ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang v\u00e0 li\u00ean k\u1ebft quang \u0111\u1ea1t m\u1ee9c hi\u1ec7u n\u0103ng mong \u0111\u1ee3i.<\/strong>, c\u00e1c switch Cisco h\u1ed7 tr\u1ee3 c\u00e1c l\u1ec7nh hi\u1ec3n th\u1ecb d\u1eef li\u1ec7u gi\u00e1m s\u00e1t quang th\u1eddi gian th\u1ef1c.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>show interfaces transceiver<br><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">or<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>show interfaces transceiver detail<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c l\u1ec7nh n\u00e0y cung c\u1ea5p c\u00e1c th\u00f4ng s\u1ed1 quan tr\u1ecdng nh\u01b0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Nhi\u1ec7t \u0111\u1ed9 module<\/p><\/li>\n\n\n\n<li><p>\u0110i\u1ec7n \u00e1p cung c\u1ea5p<\/p><\/li>\n\n\n\n<li><p>D\u00f2ng ph\u00e2n c\u1ef1c laser<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t quang ph\u00e1t (TX)<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t quang nh\u1eadn (RX)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch ph\u00e2n t\u00edch c\u00e1c gi\u00e1 tr\u1ecb n\u00e0y, k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh xem m\u00f4-\u0111un SFP c\u00f3 \u0111ang ho\u1ea1t \u0111\u1ed9ng trong ph\u1ea1m vi b\u00ecnh th\u01b0\u1eddng hay g\u1eb7p s\u1ef1 c\u1ed1 v\u1ec1 t\u00edn hi\u1ec7u quang hay kh\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u1ea1i sao C\u00e1c L\u1ec7nh N\u00e0y Quan Tr\u1ecdng trong Vi\u1ec7c Kh\u1eafc Ph\u1ee5c S\u1ef1 C\u1ed1 SFP<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c l\u1ec7nh Cisco n\u00e0y cho ph\u00e9p qu\u1ea3n tr\u1ecb vi\u00ean nhanh ch\u00f3ng ki\u1ec3m tra tr\u1ea1ng th\u00e1i m\u00f4-\u0111un SFP v\u00e0 ch\u1ea9n \u0111o\u00e1n c\u00e1c v\u1ea5n \u0111\u1ec1 k\u1ebft n\u1ed1i. V\u00ed d\u1ee5:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>N\u1ebfu SFP <strong>kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n<\/strong>, m\u00f4-\u0111un c\u00f3 th\u1ec3 kh\u00f4ng t\u01b0\u01a1ng th\u00edch ho\u1eb7c b\u1ecb l\u1ed7i.<\/p><\/li>\n\n\n\n<li><p>N\u1ebfu <strong>c\u00f4ng su\u1ea5t RX qu\u00e1 th\u1ea5p<\/strong>, c\u00e1p quang c\u00f3 th\u1ec3 b\u1ecb h\u01b0 h\u1ecfng ho\u1eb7c qu\u00e1 d\u00e0i.<\/p><\/li>\n\n\n\n<li><p>N\u1ebfu <strong>gi\u00e1 tr\u1ecb nhi\u1ec7t \u0111\u1ed9 b\u1ea5t th\u01b0\u1eddng<\/strong>, b\u1ed9 thu ph\u00e1t c\u00f3 th\u1ec3 \u0111ang qu\u00e1 n\u00f3ng.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Do \u0111\u00f3, vi\u1ec7c ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 tr\u1ea1ng th\u00e1i SFP th\u00f4ng qua ch\u1ea9n \u0111o\u00e1n CLI l\u00e0 m\u1ed9t b\u01b0\u1edbc then ch\u1ed1t trong <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-troubleshooting-quick-checklist\/\">Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 SFP<\/a> v\u00e0 duy tr\u00ec k\u1ebft n\u1ed1i m\u1ea1ng s\u1ee3i quang \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u27a1\ufe0f C\u00e1ch Ki\u1ec3m Tra M\u00f4-\u0111un SFP (T\u1eebng B\u01b0\u1edbc)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ec3m tra m\u00f4-\u0111un SFP l\u00e0 m\u1ed9t ph\u1ea7n thi\u1ebft y\u1ebfu trong vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 m\u1ea1ng v\u00e0 x\u00e1c minh li\u00ean k\u1ebft quang. Khi m\u1ed9t li\u00ean k\u1ebft s\u1ee3i quang g\u1eb7p s\u1ef1 c\u1ed1 ho\u1eb7c m\u1ea5t \u1ed5n \u0111\u1ecbnh, k\u1ef9 s\u01b0 th\u01b0\u1eddng th\u1ef1c hi\u1ec7n quy tr\u00ecnh ki\u1ec3m tra c\u00f3 c\u1ea5u tr\u00fac \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n s\u1ef1 c\u1ed1 c\u00f3 ph\u1ea3i do <strong>b\u1ed9 thu ph\u00e1t SFP, c\u00e1p s\u1ee3i quang hay c\u1ed5ng switch<\/strong>.<\/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\/4ffba1f2fbf64178ad390df9a586b2eb.jpg\" alt=\"How to Test an SFP Module (Step-by-Step)\" class=\"wp-image-2870\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4ffba1f2fbf64178ad390df9a586b2eb.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4ffba1f2fbf64178ad390df9a586b2eb-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4ffba1f2fbf64178ad390df9a586b2eb-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4ffba1f2fbf64178ad390df9a586b2eb-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4ffba1f2fbf64178ad390df9a586b2eb-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c t\u1ebf <strong>t\u1eebng b\u01b0\u1edbc \u0111\u1ec3 ki\u1ec3m tra m\u00f4-\u0111un SFP<\/strong>, th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong c\u00e1c m\u1ea1ng doanh nghi\u1ec7p v\u00e0 trung t\u00e2m d\u1eef li\u1ec7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 1. Th\u1ef1c hi\u1ec7n Ki\u1ec3m Tra V\u1eadt L\u00fd<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u01b0\u1edbc \u0111\u1ea7u ti\u00ean khi ki\u1ec3m tra m\u00f4-\u0111un SFP l\u00e0 ki\u1ec3m tra <strong>ph\u1ea7n c\u1ee9ng v\u00e0 k\u1ebft n\u1ed1i s\u1ee3i quang<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ec3m tra c\u00e1c y\u1ebfu t\u1ed1 sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ea3m b\u1ea3o r\u1eb1ng <strong>m\u00f4-\u0111un SFP \u0111\u01b0\u1ee3c c\u1eafm \u0111\u1ea7y \u0111\u1ee7<\/strong> v\u00e0o c\u1ed5ng switch<\/p><\/li>\n\n\n\n<li><p>X\u00e1c nh\u1eadn r\u1eb1ng <strong>c\u00e1c \u0111\u1ea7u n\u1ed1i LC \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i \u0111\u00fang c\u00e1ch<\/strong><\/p><\/li>\n\n\n\n<li><p>Ki\u1ec3m tra <strong>c\u00e1p n\u1ed1i s\u1ee3i quang \u0111\u1ec3 ph\u00e1t hi\u1ec7n h\u01b0 h\u1ecfng ho\u1eb7c cong v\u00eanh<\/strong><\/p><\/li>\n\n\n\n<li><p>L\u00e0m s\u1ea1ch c\u00e1c \u0111\u1ea7u n\u1ed1i s\u1ee3i quang nh\u1eb1m lo\u1ea1i b\u1ecf <strong>b\u1ee5i b\u1ea9n ho\u1eb7c t\u1ea1p ch\u1ea5t<\/strong><\/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 ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y ra <strong>suy hao t\u00edn hi\u1ec7u quang v\u00e0 li\u00ean k\u1ebft kh\u00f4ng \u1ed5n \u0111\u1ecbnh<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 2. Ki\u1ec3m tra Tr\u1ea1ng Th\u00e1i Li\u00ean K\u1ebft tr\u00ean Switch<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ti\u1ebfp theo, x\u00e1c minh xem b\u1ed9 chuy\u1ec3n m\u1ea1ch c\u00f3 ph\u00e1t hi\u1ec7n m\u00f4-\u0111un SFP hay kh\u00f4ng v\u00e0 giao di\u1ec7n c\u00f3 \u0111ang ho\u1ea1t \u0111\u1ed9ng hay kh\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00ean h\u1ea7u h\u1ebft c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch, k\u1ef9 s\u01b0 ki\u1ec3m tra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Tr\u1ea1ng th\u00e1i giao di\u1ec7n<\/strong><\/p><\/li>\n\n\n\n<li><p><strong>T\u1ed1c \u0111\u1ed9 li\u00ean k\u1ebft<\/strong><\/p><\/li>\n\n\n\n<li><p><strong>Tr\u1ea1ng th\u00e1i c\u1ed5ng (l\u00ean\/xu\u1ed1ng)<\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu giao di\u1ec7n hi\u1ec3n th\u1ecb <strong>kh\u00f4ng c\u00f3 li\u00ean k\u1ebft<\/strong>, v\u1ea5n \u0111\u1ec1 c\u00f3 th\u1ec3 li\u00ean quan \u0111\u1ebfn:<\/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>\n\n\n\n<li><p>c\u00e1p s\u1ee3i quang b\u1ecb ng\u1eaft k\u1ebft n\u1ed1i<\/p><\/li>\n\n\n\n<li><p>lo\u1ea1i s\u1ee3i quang kh\u00f4ng \u0111\u00fang<\/p><\/li>\n\n\n\n<li><p>c\u1ed5ng chuy\u1ec3n m\u1ea1ch b\u1ecb l\u1ed7i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c ki\u1ec3m tra tr\u1ea1ng th\u00e1i li\u00ean k\u1ebft gi\u00fap x\u00e1c nh\u1eadn xem <strong>m\u00f4-\u0111un SFP c\u00f3 \u0111ang giao ti\u1ebfp v\u1edbi thi\u1ebft b\u1ecb t\u1eeb xa hay kh\u00f4ng<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 3. \u0110\u1ecdc Ch\u1ea9n \u0111o\u00e1n Quang h\u1ecdc (DDM \/ DOM)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ea7u h\u1ebft c\u00e1c b\u1ed9 thu ph\u00e1t SFP hi\u1ec7n \u0111\u1ea1i \u0111\u1ec1u h\u1ed7 tr\u1ee3 <strong>Gi\u00e1m s\u00e1t Quang h\u1ecdc K\u1ef9 thu\u1eadt s\u1ed1 (<\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/ddm-dom-in-optical-transceivers\/\"><strong>DOM<\/strong><\/a><strong>) ho\u1eb7c Gi\u00e1m s\u00e1t Ch\u1ea9n \u0111o\u00e1n K\u1ef9 thu\u1eadt s\u1ed1 (DDM)<\/strong>, cung c\u1ea5p d\u1eef li\u1ec7u hi\u1ec7u su\u1ea5t th\u1eddi gian th\u1ef1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c th\u00f4ng s\u1ed1 \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m:<\/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>Tham s\u1ed1<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>\u0110i\u1ec1u n\u00e0y cho bi\u1ebft<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Nhi\u1ec7t \u0111\u1ed9<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Nhi\u1ec7t \u0111\u1ed9 n\u1ed9i b\u1ed9 c\u1ee7a m\u00f4-\u0111un<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>\u0110i\u1ec7n \u00e1p<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ngu\u1ed3n \u0111i\u1ec7n cung c\u1ea5p cho m\u00f4-\u0111un<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>C\u00f4ng su\u1ea5t quang ph\u00e1t (TX Optical Power)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed9 m\u1ea1nh c\u1ee7a t\u00edn hi\u1ec7u quang truy\u1ec1n \u0111i<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>C\u00f4ng su\u1ea5t quang nh\u1eadn (RX Optical Power)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed9 m\u1ea1nh c\u1ee7a t\u00edn hi\u1ec7u quang nh\u1eadn \u0111\u01b0\u1ee3c<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>D\u00f2ng thi\u00ean \u00e1p laser<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>D\u00f2ng \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng c\u1ee7a laser<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu <strong>C\u00f4ng su\u1ea5t quang RX qu\u00e1 th\u1ea5p<\/strong>, li\u00ean k\u1ebft s\u1ee3i quang c\u00f3 th\u1ec3 \u0111ang g\u1eb7p ph\u1ea3i suy hao ho\u1eb7c s\u1ef1 c\u1ed1 k\u1ebft n\u1ed1i. N\u1ebfu <strong>nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c \u0111i\u1ec7n \u00e1p b\u1ea5t th\u01b0\u1eddng<\/strong>, m\u00f4-\u0111un SFP c\u00f3 th\u1ec3 \u0111ang ti\u1ebfn g\u1ea7n \u0111\u1ebfn s\u1ef1 c\u1ed1 ph\u1ea7n c\u1ee9ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 4. X\u00e1c minh Lo\u1ea1i S\u1ee3i Quang v\u00e0 T\u00ednh T\u01b0\u01a1ng Th\u00edch<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t b\u01b0\u1edbc quan tr\u1ecdng kh\u00e1c khi ki\u1ec3m tra m\u00f4-\u0111un SFP l\u00e0 x\u00e1c nh\u1eadn r\u1eb1ng <strong>lo\u1ea1i s\u1ee3i quang ph\u00f9 h\u1ee3p v\u1edbi <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/blog\/optical-transceiver-datasheet-guide-sfp-specs-pdf-downloads.htm\"><strong>th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a b\u1ed9 thu ph\u00e1t<\/strong><\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng t\u01b0\u01a1ng th\u00edch ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/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>Lo\u1ea1i SFP<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Lo\u1ea1i c\u00e1p s\u1ee3i quang y\u00eau c\u1ea7u<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475415.htm\">10GBASE-SR<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1p s\u1ee3i quang \u0111a mode (OM3 \/ OM4)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475586.htm\">10GBASE-LR<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>What Does SFP Stand For?<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-27039-1g-bidi-sfp.htm\">B\u1ed9 thu ph\u00e1t SFP BiDi<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>S\u1ee3i \u0111\u01a1n v\u1edbi c\u1eb7p b\u01b0\u1edbc s\u00f3ng<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c s\u1eed d\u1ee5ng sai lo\u1ea1i s\u1ee3i quang c\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n vi\u1ec7c thi\u1ebft l\u1eadp li\u00ean k\u1ebft, ngay c\u1ea3 khi module SFP b\u1ea3n th\u00e2n v\u1eabn ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">B\u01b0\u1edbc 5. Thay th\u1ebf ho\u1eb7c ho\u00e1n \u0111\u1ed5i module SFP<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu c\u00e1c b\u01b0\u1edbc ki\u1ec3m tra tr\u01b0\u1edbc \u0111\u00f3 kh\u00f4ng gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1, b\u01b0\u1edbc cu\u1ed1i c\u00f9ng l\u00e0 <strong>ho\u00e1n \u0111\u1ed5i module SFP b\u1eb1ng m\u1ed9t b\u1ed9 thu ph\u00e1t \u0111\u00e3 bi\u1ebft l\u00e0 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ec3m tra n\u00e0y gi\u00fap x\u00e1c \u0111\u1ecbnh ngu\u1ed3n g\u1ed1c s\u1ef1 c\u1ed1:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>N\u1ebfu li\u00ean k\u1ebft ho\u1ea1t \u0111\u1ed9ng v\u1edbi module SFP kh\u00e1c, module ban \u0111\u1ea7u c\u00f3 kh\u1ea3 n\u0103ng <strong>b\u1ecb l\u1ed7i<\/strong>.<\/p><\/li>\n\n\n\n<li><p>N\u1ebfu v\u1ea5n \u0111\u1ec1 v\u1eabn ti\u1ebfp di\u1ec5n, nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3 li\u00ean quan \u0111\u1ebfn <strong>c\u00e1p s\u1ee3i quang ho\u1eb7c c\u1ed5ng switch<\/strong>.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">RJ45 Copper SFP <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/the-hot-pluggable-nature-of-optical-modules\/\">Cat5e\/Cat6 Ethernet<\/a>, k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 thay th\u1ebf ch\u00fang m\u1ed9t c\u00e1ch an to\u00e0n m\u00e0 kh\u00f4ng c\u1ea7n t\u1eaft ngu\u1ed3n switch, nh\u1edd \u0111\u00f3 vi\u1ec7c g\u1ee1 r\u1ed1i tr\u1edf n\u00ean nhanh h\u01a1n trong c\u00e1c m\u1ea1ng s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c tu\u00e2n theo quy tr\u00ecnh ki\u1ec3m tra module SFP h\u1ec7 th\u1ed1ng n\u00e0y<strong>s<\/strong> cho ph\u00e9p k\u1ef9 s\u01b0 m\u1ea1ng nhanh ch\u00f3ng x\u00e1c \u0111\u1ecbnh xem s\u1ef1 c\u1ed1 b\u1eaft ngu\u1ed3n t\u1eeb b\u1ed9 thu ph\u00e1t, c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ee3i quang hay thi\u1ebft b\u1ecb m\u1ea1ng, t\u1eeb \u0111\u00f3 gi\u1ea3m th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng v\u00e0 n\u00e2ng cao hi\u1ec7u qu\u1ea3 g\u1ee1 r\u1ed1i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u27a1\ufe0f C\u00e1ch \u0111\u1ecdc d\u1eef li\u1ec7u ch\u1ea9n \u0111o\u00e1n SFP (DOM \/ DDM)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ea7u h\u1ebft c\u00e1c b\u1ed9 thu ph\u00e1t SFP v\u00e0 SFP+ hi\u1ec7n \u0111\u1ea1i \u0111\u1ec1u h\u1ed7 tr\u1ee3 <strong>Gi\u00e1m s\u00e1t quang h\u1ecdc k\u1ef9 thu\u1eadt s\u1ed1 (DOM)<\/strong> or <strong>Gi\u00e1m s\u00e1t ch\u1ea9n \u0111o\u00e1n k\u1ef9 thu\u1eadt s\u1ed1 (DDM)<\/strong>. C\u00e1c t\u00ednh n\u0103ng n\u00e0y cho ph\u00e9p k\u1ef9 s\u01b0 m\u1ea1ng gi\u00e1m s\u00e1t <strong>tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng th\u1eddi gian th\u1ef1c c\u1ee7a m\u1ed9t module quang<\/strong>, bao g\u1ed3m c\u00e1c \u0111i\u1ec1u ki\u1ec7n \u0111i\u1ec7n v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c \u0111\u1ecdc c\u00e1c gi\u00e1 tr\u1ecb ch\u1ea9n \u0111o\u00e1n n\u00e0y l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e1ch hi\u1ec7u qu\u1ea3 nh\u1ea5t \u0111\u1ec3 ki\u1ec3m tra t\u00ecnh tr\u1ea1ng s\u1ee9c kh\u1ecfe c\u1ee7a module SFP v\u00e0 ph\u00e1t hi\u1ec7n s\u1edbm c\u00e1c s\u1ef1 c\u1ed1 ti\u1ec1m \u1ea9n tr\u00ean m\u1ea1ng tr\u01b0\u1edbc khi li\u00ean k\u1ebft b\u1ecb gi\u00e1n \u0111o\u1ea1n.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/06c878f9bf75475c943f050553863313-1024x576.jpg\" alt=\"How to Read SFP Diagnostics (DOM \/ DDM Data)\" class=\"wp-image-2871\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/06c878f9bf75475c943f050553863313-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/06c878f9bf75475c943f050553863313-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/06c878f9bf75475c943f050553863313-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/06c878f9bf75475c943f050553863313-18x10.jpg 18w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/06c878f9bf75475c943f050553863313.jpg 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c <strong>tham s\u1ed1 ch\u1ea9n \u0111o\u00e1n SFP quan tr\u1ecdng nh\u1ea5t<\/strong> th\u01b0\u1eddng \u0111\u01b0\u1ee3c b\u00e1o c\u00e1o b\u1edfi c\u00e1c switch v\u00e0 thi\u1ebft b\u1ecb m\u1ea1ng.<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 311px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"311\"><p>Tham s\u1ed1<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>\u00dd ngh\u0129a<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"311\"><p>Nhi\u1ec7t \u0111\u1ed9<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Nhi\u1ec7t \u0111\u1ed9 b\u00ean trong module SFP, d\u00f9ng \u0111\u1ec3 gi\u00e1m s\u00e1t hi\u1ec7n t\u01b0\u1ee3ng qu\u00e1 nhi\u1ec7t<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"311\"><p>\u0110i\u1ec7n \u00e1p<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110i\u1ec7n \u00e1p cung c\u1ea5p cho b\u1ed9 thu ph\u00e1t<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"311\"><p>C\u00f4ng su\u1ea5t TX<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00f4ng su\u1ea5t quang truy\u1ec1n t\u1eeb module ra s\u1ee3i quang<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"311\"><p>C\u00f4ng su\u1ea5t RX<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00f4ng su\u1ea5t quang nh\u1eadn t\u1eeb thi\u1ebft b\u1ecb xa<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"311\"><p>D\u00f2ng thi\u00ean \u00e1p laser<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>D\u00f2ng \u0111i\u1ec7n c\u1ea5p cho \u0111i-\u1ed1t laser b\u00ean trong b\u1ed9 thu ph\u00e1t<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Gi\u1ea3i th\u00edch t\u1eebng tham s\u1ed1 ch\u1ea9n \u0111o\u00e1n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nhi\u1ec7t \u0111\u1ed9<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec7t \u0111\u1ed9 module cho bi\u1ebft li\u1ec7u b\u1ed9 thu ph\u00e1t c\u00f3 \u0111ang ho\u1ea1t \u0111\u1ed9ng trong ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 an to\u00e0n hay kh\u00f4ng. Nhi\u1ec7t \u0111\u1ed9 qu\u00e1 cao c\u00f3 th\u1ec3 do lu\u1ed3ng kh\u00ed l\u00e0m m\u00e1t k\u00e9m trong switch ho\u1eb7c module \u0111ang h\u1ecfng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng \u0111i\u1ec3n h\u00ecnh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>0\u00b0C \u0111\u1ebfn 70\u00b0C<\/strong> \u0111\u1ed1i v\u1edbi module th\u01b0\u01a1ng m\u1ea1i<\/p><\/li>\n\n\n\n<li><p><strong>-40\u00b0C \u0111\u1ebfn 85\u00b0C,<\/strong> \u0111\u1ed1i v\u1edbi module c\u00f4ng nghi\u1ec7p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110i\u1ec7n \u00e1p<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec7n \u00e1p cung c\u1ea5p ph\u1ea3n \u00e1nh \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh \u0111i\u1ec7n c\u1ee7a module. C\u00e1c gi\u00e1 tr\u1ecb \u0111i\u1ec7n \u00e1p b\u1ea5t th\u01b0\u1eddng c\u00f3 th\u1ec3 cho th\u1ea5y v\u1ea5n \u0111\u1ec1 v\u1ec1 \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n \u00e1p t\u1ea1i c\u1ed5ng switch ho\u1eb7c suy gi\u1ea3m ph\u1ea7n c\u1ee9ng b\u00ean trong b\u1ed9 thu ph\u00e1t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00f4ng su\u1ea5t quang ph\u00e1t (TX Optical Power)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f4ng su\u1ea5t TX bi\u1ec3u th\u1ecb \u0111\u1ed9 m\u1ea1nh c\u1ee7a t\u00edn hi\u1ec7u quang do module SFP ph\u00e1t ra.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu c\u00f4ng su\u1ea5t TX th\u1ea5p \u0111\u00e1ng k\u1ec3 so v\u1edbi m\u1ee9c k\u1ef3 v\u1ecdng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>laser c\u00f3 th\u1ec3 \u0111ang suy gi\u1ea3m<\/p><\/li>\n\n\n\n<li><p>module c\u00f3 th\u1ec3 b\u1ecb l\u1ed7i<\/p><\/li>\n\n\n\n<li><p>module SFP c\u00f3 th\u1ec3 kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi switch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00f4ng su\u1ea5t quang nh\u1eadn (RX Optical Power)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f4ng su\u1ea5t RX \u0111o l\u01b0\u1eddng t\u00edn hi\u1ec7u quang \u0111\u1ea7u v\u00e0o t\u1eeb thi\u1ebft b\u1ecb xa. Gi\u00e1 tr\u1ecb n\u00e0y c\u1ef1c k\u1ef3 quan tr\u1ecdng trong vi\u1ec7c g\u1ee1 r\u1ed1i li\u00ean k\u1ebft s\u1ee3i quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f4ng su\u1ea5t RX th\u1ea5p c\u00f3 th\u1ec3 do:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>kho\u1ea3ng c\u00e1ch s\u1ee3i quang qu\u00e1 d\u00e0i<\/p><\/li>\n\n\n\n<li><p>\u0111\u1ea7u n\u1ed1i b\u1ecb b\u1ea9n<\/p><\/li>\n\n\n\n<li><p>c\u00e1p s\u1ee3i quang b\u1ecb h\u01b0 h\u1ecfng<\/p><\/li>\n\n\n\n<li><p>lo\u1ea1i s\u1ee3i quang kh\u00f4ng \u0111\u00fang (SMF so v\u1edbi MMF)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D\u00f2ng thi\u00ean \u00e1p laser<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00f2ng ph\u00e2n c\u1ef1c laser bi\u1ec3u th\u1ecb d\u00f2ng \u0111i\u1ec7n c\u1ea5p cho b\u1ed9 ph\u00e1t quang. Khi laser b\u1eaft \u0111\u1ea7u l\u00e3o h\u00f3a, module th\u01b0\u1eddng t\u0103ng d\u00f2ng ph\u00e2n c\u1ef1c \u0111\u1ec3 duy tr\u00ec c\u00f4ng su\u1ea5t \u0111\u1ea7u ra quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00f2ng ph\u00e2n c\u1ef1c cao k\u1ebft h\u1ee3p v\u1edbi c\u00f4ng su\u1ea5t TX th\u1ea5p th\u01b0\u1eddng l\u00e0 d\u1ea5u hi\u1ec7u r\u00f5 r\u00e0ng cho th\u1ea5y module SFP \u0111ang ti\u1ebfn g\u1ea7n \u0111\u1ebfn s\u1ef1 c\u1ed1 ph\u1ea7n c\u1ee9ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e1ch x\u00e1c \u0111\u1ecbnh module SFP b\u1ecb l\u1ed7i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch ph\u00e2n t\u00edch c\u00e1c gi\u00e1 tr\u1ecb DOM\/DDM, k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 nhanh ch\u00f3ng x\u00e1c \u0111\u1ecbnh xem module SFP c\u00f3 \u0111ang ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng hay kh\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c d\u1ea5u hi\u1ec7u c\u1ea3nh b\u00e1o \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m:<\/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>Tri\u1ec7u ch\u1ee9ng<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3 x\u1ea3y ra<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>C\u00f4ng su\u1ea5t RX c\u1ef1c k\u1ef3 th\u1ea5p<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ea7u n\u1ed1i b\u1ea9n ho\u1eb7c s\u1ee3i quang b\u1ecb h\u01b0 h\u1ecfng<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>C\u00f4ng su\u1ea5t TX n\u1eb1m ngo\u00e0i ph\u1ea1m vi b\u00ecnh th\u01b0\u1eddng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Laser suy gi\u1ea3m<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Nhi\u1ec7t \u0111\u1ed9 qu\u00e1 cao<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>V\u1ea5n \u0111\u1ec1 l\u00e0m m\u00e1t ho\u1eb7c module \u0111ang h\u1ecfng<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>D\u00f2ng ph\u00e2n c\u1ef1c b\u1ea5t th\u01b0\u1eddng cao<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Laser \u0111ang l\u00e3o h\u00f3a ho\u1eb7c h\u1ecfng<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Kh\u00f4ng c\u00f3 d\u1eef li\u1ec7u DOM s\u1eb5n s\u00e0ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Module SFP kh\u00f4ng h\u1ed7 tr\u1ee3 DOM ho\u1eb7c gi\u1edbi h\u1ea1n t\u01b0\u01a1ng th\u00edch<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Khi xu\u1ea5t hi\u1ec7n c\u00e1c gi\u00e1 tr\u1ecb b\u1ea5t th\u01b0\u1eddng n\u00e0y, k\u1ef9 s\u01b0 th\u01b0\u1eddng l\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i s\u1ee3i quang, x\u00e1c minh lo\u1ea1i s\u1ee3i quang ho\u1eb7c thay th\u1ebf module SFP \u0111\u1ec3 kh\u00f4i ph\u1ee5c ho\u1ea1t \u0111\u1ed9ng m\u1ea1ng \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Do \u0111\u00f3, vi\u1ec7c hi\u1ec3u c\u00e1ch di\u1ec5n gi\u1ea3i d\u1eef li\u1ec7u ch\u1ea9n \u0111o\u00e1n SFP v\u00e0 DOM l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu nh\u1eb1m \u0111\u1ea3m b\u1ea3o hi\u1ec7u qu\u1ea3 g\u1ee1 r\u1ed1i module SFP c\u0169ng nh\u01b0 b\u1ea3o tr\u00ec m\u1ea1ng s\u1ee3i quang.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u27a1\ufe0f C\u00e1ch x\u00e1c \u0111\u1ecbnh n\u00ean s\u1eed d\u1ee5ng module SFP n\u00e0o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t c\u00e2u h\u1ecfi ph\u1ed5 bi\u1ebfn gi\u1eefa c\u00e1c k\u1ef9 s\u01b0 m\u1ea1ng l\u00e0 <strong>\u201cL\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 bi\u1ebft n\u00ean s\u1eed d\u1ee5ng module SFP n\u00e0o?\u201d<\/strong> Vi\u1ec7c l\u1ef1a ch\u1ecdn b\u1ed9 thu ph\u00e1t ch\u00ednh x\u00e1c l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu nh\u1eb1m \u0111\u1ea3m b\u1ea3o k\u1ebft n\u1ed1i \u1ed5n \u0111\u1ecbnh, hi\u1ec7u n\u0103ng t\u1ed1i \u01b0u v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi thi\u1ebft b\u1ecb m\u1ea1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1ef1a ch\u1ecdn module SFP ph\u00f9 h\u1ee3p th\u01b0\u1eddng ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 k\u1ef9 thu\u1eadt then ch\u1ed1t, bao g\u1ed3m t\u1ed1c \u0111\u1ed9 m\u1ea1ng, lo\u1ea1i s\u1ee3i quang, kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn, b\u01b0\u1edbc s\u00f3ng ho\u1ea1t \u0111\u1ed9ng v\u00e0 lo\u1ea1i \u0111\u1ea7u n\u1ed1i. Vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c th\u00f4ng s\u1ed1 n\u00e0y gi\u00fap \u0111\u1ea3m b\u1ea3o module SFP v\u1eeba kh\u1edbp v\u1edbi c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng m\u1ea1ng v\u1eeba \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u \u1ee9ng d\u1ee5ng.<\/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\/5cfe178379be40ecada90346e1f4bd89.jpg\" alt=\"How to Know What SFP Module to Use\" class=\"wp-image-2872\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5cfe178379be40ecada90346e1f4bd89.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5cfe178379be40ecada90346e1f4bd89-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5cfe178379be40ecada90346e1f4bd89-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5cfe178379be40ecada90346e1f4bd89-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5cfe178379be40ecada90346e1f4bd89-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u2605 T\u1ed1c \u0111\u1ed9 m\u1ea1ng (1G \/ 10G \/ 25G)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Y\u1ebfu t\u1ed1 \u0111\u1ea7u ti\u00ean c\u1ea7n c\u00e2n nh\u1eafc l\u00e0 t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u m\u00e0 c\u1ed5ng switch ho\u1eb7c router h\u1ed7 tr\u1ee3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c h\u1ea1ng t\u1ed1c \u0111\u1ed9 SFP ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/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>T\u1ed1c \u0111\u1ed9<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Lo\u1ea1i m\u00f4-\u0111un<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Ti\u00eau chu\u1ea9n \u0111i\u1ec3n h\u00ecnh<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>1 Gbps<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>SFP<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>1000BASE-SX \/ LX<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>10 Gbps<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>SFP+<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>10GBASE-SR \/ LR<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>25 Gbps<br><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26225-25g-sfp28.htm\">SFP28<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476088.htm\">25GBASE-LR<\/a> \/ LR<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c s\u1eed d\u1ee5ng sai h\u1ea1ng t\u1ed1c \u0111\u1ed9 c\u00f3 th\u1ec3 khi\u1ebfn module kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng ho\u1eb7c khi\u1ebfn c\u1ed5ng b\u1ecb t\u1eaft ho\u1eb7c kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2605 Lo\u1ea1i s\u1ee3i quang (MMF so v\u1edbi SMF)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng kh\u00e1c l\u00e0 m\u1ea1ng s\u1eed d\u1ee5ng <strong>s\u1ee3i quang \u0111a mode (MMF)<\/strong> or <strong>v\u00e0 s\u1ee3i quang \u0111\u01a1n mode (SMF)<\/strong>.<\/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>Lo\u1ea1i s\u1ee3i<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>M\u00f4-\u0111un \u0111i\u1ec3n h\u00ecnh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1p quang \u0111a mode (MMF)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>SX, SR<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Li\u00ean k\u1ebft trung t\u00e2m d\u1eef li\u1ec7u kho\u1ea3ng c\u00e1ch ng\u1eafn<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1p quang \u0111\u01a1n mode (SMF)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>LX, LR, ER<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>K\u1ebft n\u1ed1i kho\u1ea3ng c\u00e1ch xa<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\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><strong>SFP+ 10GBASE-SR<\/strong> \u2192 d\u00e0nh ri\u00eang cho s\u1ee3i \u0111a mode (MMF)<\/p><\/li>\n\n\n\n<li><p><strong>SFP+ 10GBASE-LR<\/strong> \u2192 d\u00e0nh ri\u00eang cho s\u1ee3i \u0111\u01a1n mode (SMF)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c s\u1eed d\u1ee5ng sai lo\u1ea1i s\u1ee3i quang c\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n vi\u1ec7c thi\u1ebft l\u1eadp li\u00ean k\u1ebft quang.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2605 Kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kho\u1ea3ng c\u00e1ch <strong>li\u00ean k\u1ebft y\u00eau c\u1ea7u<\/strong> l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng kh\u00e1c c\u1ea7n xem x\u00e9t khi ch\u1ecdn module SFP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c ti\u00eau chu\u1ea9n quang h\u1ecdc kh\u00e1c nhau h\u1ed7 tr\u1ee3 c\u00e1c kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn t\u1ed1i \u0111a kh\u00e1c nhau:<\/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>Lo\u1ea1i m\u00f4-\u0111un<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Kho\u1ea3ng c\u00e1ch \u0111i\u1ec3n h\u00ecnh<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>SR (T\u1ea7m ng\u1eafn)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Li\u00ean k\u1ebft gi\u1eefa c\u00e1c t\u1ee7 rack, li\u00ean k\u1ebft trong trung t\u00e2m d\u1eef li\u1ec7u<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>LR (T\u1ea7m xa)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>10 km<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>ER (T\u1ea7m m\u1edf r\u1ed9ng)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u1ea1ng doanh nghi\u1ec7p v\u00e0 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 kho\u1ea3ng c\u00e1ch xa<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu \u0111\u01b0\u1eddng c\u00e1p s\u1ee3i quang v\u01b0\u1ee3t qu\u00e1 kho\u1ea3ng c\u00e1ch \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3, t\u00edn hi\u1ec7u quang c\u00f3 th\u1ec3 tr\u1edf n\u00ean qu\u00e1 y\u1ebfu \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o truy\u1ec1n th\u00f4ng tin \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2605 B\u01b0\u1edbc s\u00f3ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed7i b\u1ed9 thu ph\u00e1t quang ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ed9t b\u01b0\u1edbc s\u00f3ng laser c\u1ee5 th\u1ec3, \u0111i\u1ec1u n\u00e0y x\u00e1c \u0111\u1ecbnh c\u00e1ch t\u00edn hi\u1ec7u quang lan truy\u1ec1n qua s\u1ee3i quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u01b0\u1edbc s\u00f3ng ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>850 nm<\/strong> \u2014 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho thi\u1ebft b\u1ecb quang \u0111a mode (SR)<\/p><\/li>\n\n\n\n<li><p><strong>1310 nm<\/strong> \u2014 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho thi\u1ebft b\u1ecb quang \u0111\u01a1n mode \u1edf kho\u1ea3ng c\u00e1ch trung b\u00ecnh (LR)<\/p><\/li>\n\n\n\n<li><p><strong>1550 nm<\/strong> \u2014 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho thi\u1ebft b\u1ecb quang \u1edf kho\u1ea3ng c\u00e1ch xa (ER \/ ZR)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c kh\u1edbp b\u01b0\u1edbc s\u00f3ng gi\u1eefa hai \u0111\u1ea7u c\u1ee7a \u0111\u01b0\u1eddng k\u1ebft n\u1ed1i l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o truy\u1ec1n th\u00f4ng \u0111\u00fang c\u00e1ch.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2605 Lo\u1ea1i \u0111\u1ea7u n\u1ed1i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u1ea7n l\u1edbn c\u00e1c module SFP s\u1eed d\u1ee5ng \u0111\u1ea7u n\u1ed1i LC duplex, nh\u01b0ng c\u00e1c lo\u1ea1i giao di\u1ec7n kh\u00e1c c\u0169ng c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i t\u00f9y theo \u1ee9ng d\u1ee5ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c lo\u1ea1i \u0111\u1ea7u n\u1ed1i ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/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>\u0110\u1ea7u n\u1ed1i<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>M\u00f4 t\u1ea3<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>LC Duplex<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u1ed1i v\u1edbi c\u00e1c module SFP v\u00e0 SFP+<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>SC<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ee3i quang c\u0169<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>RJ45<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1c module SFP Ethernet \u0111\u1ed3ng<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ea3m b\u1ea3o lo\u1ea1i \u0111\u1ea7u n\u1ed1i ph\u00f9 h\u1ee3p gi\u00fap tr\u00e1nh c\u00e1c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch v\u1eadt l\u00fd v\u1edbi c\u00e1p n\u1ed1i s\u1ee3i quang.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2605 \u1ee8ng d\u1ee5ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c module SFP \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb cho c\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/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>\u1ee8ng d\u1ee5ng<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Module SFP \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Li\u00ean k\u1ebft kho\u1ea3ng c\u00e1ch ng\u1eafn t\u1ea1i trung t\u00e2m d\u1eef li\u1ec7u<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>SFP+ 10GBASE-SR<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Li\u00ean k\u1ebft s\u1ee3i quang gi\u1eefa c\u00e1c t\u00f2a nh\u00e0<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>SFP+ 10GBASE-LR<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>M\u1ea1ng \u0111\u00f4 th\u1ecb t\u1ea7m xa<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>SFP+ 10GBASE-ER<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1c m\u1ea1ng Gigabit Ethernet k\u1ebf th\u1eeba<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>SFP 1000BASE-SX \/ LX<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>K\u1ebft n\u1ed1i m\u00e1y ch\u1ee7 t\u1ed1c \u0111\u1ed9 cao<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/473141.htm\">SFP28 25G SR<\/a><\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch \u0111\u00e1nh gi\u00e1 c\u00e1c y\u1ebfu t\u1ed1 n\u00e0y\u2014t\u1ed1c \u0111\u1ed9, lo\u1ea1i s\u1ee3i quang, kho\u1ea3ng c\u00e1ch, b\u01b0\u1edbc s\u00f3ng v\u00e0 lo\u1ea1i \u0111\u1ea7u n\u1ed1i\u2014c\u00e1c k\u1ef9 s\u01b0 m\u1ea1ng c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c module SFP n\u00e0o ph\u00f9 h\u1ee3p nh\u1ea5t cho tri\u1ec3n khai m\u1ea1ng c\u1ee5 th\u1ec3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1ef1a ch\u1ecdn b\u1ed9 thu ph\u00e1t \u0111\u00fang kh\u00f4ng ch\u1ec9 \u0111\u1ea3m b\u1ea3o truy\u1ec1n th\u00f4ng quang \u0111\u00e1ng tin c\u1eady m\u00e0 c\u00f2n l\u00e0m \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 SFP v\u00e0 ki\u1ec3m tra t\u00ednh t\u01b0\u01a1ng th\u00edch trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh m\u1ea1ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u27a1\ufe0f C\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn khi ki\u1ec3m tra module SFP<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Khi c\u00e1c k\u1ef9 s\u01b0 ki\u1ec3m tra module SFP trong qu\u00e1 tr\u00ecnh kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 m\u1ea1ng, m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn th\u01b0\u1eddng xuy\u00ean xu\u1ea5t hi\u1ec7n. Nhi\u1ec1u v\u1ea5n \u0111\u1ec1 n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1ea3o lu\u1eadn r\u1ed9ng r\u00e3i trong c\u00e1c c\u1ed9ng \u0111\u1ed3ng v\u00e0 di\u1ec5n \u0111\u00e0n k\u1ef9 s\u01b0 m\u1ea1ng v\u00ec ch\u00fang c\u00f3 th\u1ec3 g\u00e2y ra l\u1ed7i li\u00ean k\u1ebft, k\u1ebft n\u1ed1i kh\u00f4ng \u1ed5n \u0111\u1ecbnh ho\u1eb7c c\u00e1c k\u1ebft qu\u1ea3 ch\u1ea9n \u0111o\u00e1n sai.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec3u r\u00f5 nh\u1eefng v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn n\u00e0y gi\u00fap qu\u1ea3n tr\u1ecb vi\u00ean x\u00e1c \u0111\u1ecbnh nhanh ch\u00f3ng c\u00e1c s\u1ef1 c\u1ed1 li\u00ean quan \u0111\u1ebfn SFP v\u00e0 gi\u1ea3i quy\u1ebft hi\u1ec7u qu\u1ea3 h\u01a1n c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 k\u1ebft n\u1ed1i s\u1ee3i quang.<\/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\/71927a1a05ff4ca49928b99736a1214b.jpg\" alt=\"Common Problems When Checking SFP Modules\" class=\"wp-image-2873\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/71927a1a05ff4ca49928b99736a1214b.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/71927a1a05ff4ca49928b99736a1214b-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/71927a1a05ff4ca49928b99736a1214b-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/71927a1a05ff4ca49928b99736a1214b-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/71927a1a05ff4ca49928b99736a1214b-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Kh\u00f3a nh\u00e0 cung c\u1ea5p (H\u1ea1n ch\u1ebf thi\u1ebft b\u1ecb quang h\u1ecdc b\u00ean th\u1ee9 ba)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 nh\u00e0 cung c\u1ea5p thi\u1ebft b\u1ecb m\u1ea1ng \u00e1p d\u1ee5ng c\u01a1 ch\u1ebf kh\u00f3a nh\u00e0 cung c\u1ea5p nh\u1eb1m h\u1ea1n ch\u1ebf vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c module quang h\u1ecdc c\u1ee7a b\u00ean th\u1ee9 ba. Khi m\u1ed9t switch ph\u00e1t hi\u1ec7n b\u1ed9 thu ph\u00e1t kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3, n\u00f3 c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb th\u00f4ng b\u00e1o c\u1ea3nh b\u00e1o ho\u1eb7c v\u00f4 hi\u1ec7u h\u00f3a ho\u00e0n to\u00e0n c\u1ed5ng \u0111\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c tri\u1ec7u ch\u1ee9ng \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Switch b\u00e1o c\u00e1o <strong>\u201cb\u1ed9 thu ph\u00e1t kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3\u201d<br>\u201d<\/strong><\/p><\/li>\n\n\n\n<li><p>Giao di\u1ec7n v\u1eabn <strong>t\u1eaft d\u00f9 k\u1ebft n\u1ed1i s\u1ee3i quang \u0111\u00e3 \u0111\u00fang<\/strong><\/p><\/li>\n\n\n\n<li><p>Nh\u1eadt k\u00fd c\u1ea3nh b\u00e1o ch\u1ec9 ra <strong>thi\u1ebft b\u1ecb quang h\u1ecdc kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t<\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, qu\u1ea3n tr\u1ecb vi\u00ean ph\u1ea3i s\u1eed d\u1ee5ng c\u00e1c module SFP \u0111\u01b0\u1ee3c nh\u00e0 cung c\u1ea5p ph\u00ea duy\u1ec7t ho\u1eb7c k\u00edch ho\u1ea1t c\u00e1c thi\u1ebft l\u1eadp t\u01b0\u01a1ng th\u00edch n\u1ebfu thi\u1ebft b\u1ecb h\u1ed7 tr\u1ee3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Module SFP kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn kh\u00e1c l\u00e0 l\u1eafp \u0111\u1eb7t module SFP m\u00e0 switch kh\u00f4ng nh\u1eadn d\u1ea1ng ho\u1eb7c kh\u00f4ng h\u1ed7 tr\u1ee3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3 bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Gi\u1edbi h\u1ea1n ph\u1ea7n m\u1ec1m\u56fa\u4ef6 (firmware)<\/p><\/li>\n\n\n\n<li><p>Lo\u1ea1i module kh\u00f4ng \u0111\u00fang (SFP so v\u1edbi SFP+)<\/p><\/li>\n\n\n\n<li><p>C\u1ea5u h\u00ecnh t\u1ed1c \u0111\u1ed9 kh\u00f4ng t\u01b0\u01a1ng th\u00edch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5: l\u1eafp module SFP+ 10G v\u00e0o c\u1ed5ng SFP ch\u1ec9 h\u1ed7 tr\u1ee3 1G c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn vi\u1ec7c module kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n ho\u1eb7c giao di\u1ec7n v\u1eabn \u1edf tr\u1ea1ng th\u00e1i kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110\u1ea7u n\u1ed1i s\u1ee3i quang b\u1ecb b\u1ea9n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ee5i b\u1ea9n v\u00e0 t\u1ea1p ch\u1ea5t tr\u00ean \u0111\u1ea7u n\u1ed1i s\u1ee3i quang l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y ra s\u1ef1 c\u1ed1 li\u00ean k\u1ebft quang h\u1ecdc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 c\u00e1c h\u1ea1t vi m\u00f4 tr\u00ean b\u1ec1 m\u1eb7t \u0111\u1ea7u n\u1ed1i c\u0169ng c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u v\u00e0 d\u1eabn \u0111\u1ebfn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>C\u00f4ng su\u1ea5t quang RX th\u1ea5p<\/strong><\/p><\/li>\n\n\n\n<li><p>M\u1ea5t g\u00f3i d\u1eef li\u1ec7u cao<\/p><\/li>\n\n\n\n<li><p>Li\u00ean k\u1ebft ng\u1eaft ng\u1eaft qu\u00e3ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">L\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i s\u1ee3i quang b\u1eb1ng c\u00e1c c\u00f4ng c\u1ee5 l\u00e0m s\u1ea1ch s\u1ee3i quang chuy\u00ean d\u1ee5ng th\u01b0\u1eddng l\u00e0 c\u00e1ch nhanh nh\u1ea5t \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c s\u1ef1 c\u1ed1 li\u00ean k\u1ebft SFP b\u1ea5t ng\u1edd.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Kh\u00f4ng kh\u1edbp lo\u1ea1i s\u1ee3i quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c s\u1eed d\u1ee5ng sai lo\u1ea1i s\u1ee3i quang v\u1edbi module SFP c\u1ee5 th\u1ec3 c\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n li\u00ean k\u1ebft quang h\u1ecdc ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang c\u00e1ch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng t\u01b0\u01a1ng th\u00edch ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/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>Lo\u1ea1i SFP<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Lo\u1ea1i c\u00e1p s\u1ee3i quang y\u00eau c\u1ea7u<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476076.htm\">quang h\u1ecdc SR<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>S\u1ee3i quang \u0111a mode (MMF)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/491587.htm\">Quang h\u1ecdc LR<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>S\u1ee3i quang \u0111\u01a1n mode (SMF)<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5: k\u1ebft n\u1ed1i s\u1ee3i quang \u0111a mode v\u1edbi module SFP LR \u0111\u01a1n mode c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ee9c t\u00edn hi\u1ec7u y\u1ebfu ho\u1eb7c kh\u00f4ng ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c li\u00ean k\u1ebft.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Nh\u1ea7m l\u1eabn gi\u1eefa SR v\u00e0 LR<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn kh\u00e1c x\u1ea3y ra khi k\u1ef9 s\u01b0 v\u00f4 t\u00ecnh l\u1eafp c\u00e1c ti\u00eau chu\u1ea9n quang h\u1ecdc kh\u00e1c nhau \u1edf hai \u0111\u1ea7u c\u1ee7a \u0111\u01b0\u1eddng k\u1ebft n\u1ed1i s\u1ee3i quang.<\/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>M\u1ed9t \u0111\u1ea7u s\u1eed d\u1ee5ng <strong>10GBASE-SR<\/strong><\/p><\/li>\n\n\n\n<li><p>\u0110\u1ea7u kia s\u1eed d\u1ee5ng <strong>10GBASE-LR<\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ec c\u00e1c module n\u00e0y ho\u1ea1t \u0111\u1ed9ng \u1edf c\u00e1c b\u01b0\u1edbc s\u00f3ng kh\u00e1c nhau (850 nm so v\u1edbi 1310 nm), t\u00edn hi\u1ec7u quang s\u1ebd kh\u00f4ng truy\u1ec1n th\u00f4ng \u0111\u00fang c\u00e1ch. C\u1ea3 hai \u0111\u1ea7u c\u1ee7a li\u00ean k\u1ebft \u0111\u1ec1u ph\u1ea3i s\u1eed d\u1ee5ng ti\u00eau chu\u1ea9n quang h\u1ecdc gi\u1ed1ng nhau.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Kh\u00f4ng h\u1ed7 tr\u1ee3 ch\u1ea9n \u0111o\u00e1n DOM \/ DDM<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 module SFP kh\u00f4ng h\u1ed7 tr\u1ee3 <strong>Gi\u00e1m s\u00e1t quang h\u1ecdc k\u1ef9 thu\u1eadt s\u1ed1 (DOM ho\u1eb7c DDM)<\/strong>, ngh\u0129a l\u00e0 switch kh\u00f4ng th\u1ec3 \u0111\u1ecdc c\u00e1c gi\u00e1 tr\u1ecb ch\u1ea9n \u0111o\u00e1n nh\u01b0 nhi\u1ec7t \u0111\u1ed9, c\u00f4ng su\u1ea5t ph\u00e1t (TX) ho\u1eb7c c\u00f4ng su\u1ea5t thu (RX).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi \u0111i\u1ec1u n\u00e0y x\u1ea3y ra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c l\u1ec7nh ch\u1ea9n \u0111o\u00e1n quang h\u1ecdc c\u00f3 th\u1ec3 tr\u1ea3 v\u1ec1 <strong>kh\u00f4ng c\u00f3 d\u1eef li\u1ec7u<\/strong><\/p><\/li>\n\n\n\n<li><p>C\u00f4ng c\u1ee5 gi\u00e1m s\u00e1t kh\u00f4ng th\u1ec3 ph\u00e2n t\u00edch s\u1ee9c kh\u1ecfe li\u00ean k\u1ebft<\/p><\/li>\n\n\n\n<li><p>Vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c m\u00f4i tr\u01b0\u1eddng y\u00eau c\u1ea7u gi\u00e1m s\u00e1t chi ti\u1ebft, k\u1ef9 s\u01b0 th\u01b0\u1eddng tri\u1ec3n khai c\u00e1c module SFP h\u1ed7 tr\u1ee3 DOM \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng quan s\u00e1t ch\u1ea9n \u0111o\u00e1n \u0111\u1ea7y \u0111\u1ee7.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eadn di\u1ec7n c\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn n\u00e0y gi\u00fap vi\u1ec7c ki\u1ec3m tra module SFP v\u00e0 th\u1ef1c hi\u1ec7n kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 SFP hi\u1ec7u qu\u1ea3 h\u01a1n r\u1ea5t nhi\u1ec1u. Trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, c\u00e1c v\u1ea5n \u0111\u1ec1 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft nhanh ch\u00f3ng b\u1eb1ng c\u00e1ch l\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i, x\u00e1c minh lo\u1ea1i s\u1ee3i quang, ki\u1ec3m tra t\u00ednh t\u01b0\u01a1ng th\u00edch c\u1ee7a module ho\u1eb7c thay th\u1ebf b\u1ed9 thu ph\u00e1t b\u1ecb l\u1ed7i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u27a1\ufe0f Danh s\u00e1ch ki\u1ec3m tra nhanh module SFP<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Khi kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 li\u00ean k\u1ebft s\u1ee3i quang, k\u1ef9 s\u01b0 m\u1ea1ng th\u01b0\u1eddng tu\u00e2n theo quy tr\u00ecnh ki\u1ec3m tra nhanh m\u00f4-\u0111un SFP \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c v\u1ea5n \u0111\u1ec1 ti\u1ec1m \u1ea9n tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n ch\u1ea9n \u0111o\u00e1n s\u00e2u h\u01a1n. M\u1ed9t danh s\u00e1ch ki\u1ec3m tra c\u00f3 c\u1ea5u tr\u00fac gi\u00fap nhanh ch\u00f3ng x\u00e1c \u0111\u1ecbnh xem s\u1ef1 c\u1ed1 c\u00f3 li\u00ean quan \u0111\u1ebfn b\u1ed9 thu ph\u00e1t SFP, c\u00e1p s\u1ee3i quang hay c\u1ea5u h\u00ecnh b\u1ed9 chuy\u1ec3n m\u1ea1ch hay kh\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Danh s\u00e1ch ki\u1ec3m tra kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 SFP \u0111\u01a1n gi\u1ea3n n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t m\u1ea1ng, b\u1ea3o tr\u00ec ho\u1eb7c khi m\u1ed9t li\u00ean k\u1ebft \u0111\u1ed9t ng\u1ed9t b\u1ecb gi\u00e1n \u0111o\u1ea1n.<\/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\/aad6654bf6384c9189b01b6f4919eaa7.jpg\" alt=\"Quick SFP Module Check Checklist\" class=\"wp-image-2874\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aad6654bf6384c9189b01b6f4919eaa7.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aad6654bf6384c9189b01b6f4919eaa7-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aad6654bf6384c9189b01b6f4919eaa7-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aad6654bf6384c9189b01b6f4919eaa7-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aad6654bf6384c9189b01b6f4919eaa7-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Ki\u1ec3m tra M\u00f4-\u0111un SFP T\u1eebng B\u01b0\u1edbc<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u2714 <strong>X\u00e1c nh\u1eadn lo\u1ea1i m\u00f4-\u0111un SFP<\/strong><br>X\u00e1c minh lo\u1ea1i v\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a m\u00f4-\u0111un \u0111\u00e3 c\u00e0i \u0111\u1eb7t, bao g\u1ed3m t\u1ed1c \u0111\u1ed9 (1G \/ 10G \/ 25G), ti\u00eau chu\u1ea9n quang h\u1ecdc (SR \/ LR \/ ER) v\u00e0 b\u01b0\u1edbc s\u00f3ng. Vi\u1ec7c s\u1eed d\u1ee5ng sai lo\u1ea1i m\u00f4-\u0111un l\u00e0 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u00e2y ra s\u1ef1 c\u1ed1 li\u00ean k\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2714 <strong>Ki\u1ec3m tra t\u00ednh t\u01b0\u01a1ng th\u00edch v\u1edbi b\u1ed9 chuy\u1ec3n m\u1ea1ch<\/strong><br>\u0110\u1ea3m b\u1ea3o m\u00f4-\u0111un SFP \u0111\u01b0\u1ee3c b\u1ed9 chuy\u1ec3n m\u1ea1ch ho\u1eb7c b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn h\u1ed7 tr\u1ee3. M\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb h\u1ea1n ch\u1ebf c\u00e1c b\u1ed9 quang h\u1ecdc kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 ho\u1eb7c m\u00f4-\u0111un b\u00ean th\u1ee9 ba, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 ng\u0103n c\u1ed5ng k\u00edch ho\u1ea1t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2714 <strong>X\u00e1c minh lo\u1ea1i s\u1ee3i quang<\/strong><br>X\u00e1c nh\u1eadn c\u00e1p s\u1ee3i quang ph\u00f9 h\u1ee3p v\u1edbi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt SFP.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>M\u00f4-\u0111un SR \u2192 S\u1ee3i quang \u0111a mode (OM3 \/ OM4)<\/strong><\/p><\/li>\n\n\n\n<li><p><strong>M\u00f4-\u0111un LR \u2192 S\u1ee3i quang \u0111\u01a1n mode<\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 kh\u00f4ng t\u01b0\u01a1ng th\u00edch gi\u1eefa <strong>lo\u1ea1i s\u1ee3i quang v\u00e0 m\u00f4-\u0111un SFP <\/strong>c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn t\u00edn hi\u1ec7u quang y\u1ebfu ho\u1eb7c kh\u00f4ng thi\u1ebft l\u1eadp \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2714 <strong>\u0110\u1ecdc ch\u1ea9n \u0111o\u00e1n quang (DOM\/DDM)<\/strong><br>S\u1eed d\u1ee5ng c\u00e1c l\u1ec7nh CLI c\u1ee7a b\u1ed9 chuy\u1ec3n m\u1ea1ch \u0111\u1ec3 \u0111\u1ecdc c\u00e1c gi\u00e1 tr\u1ecb ch\u1ea9n \u0111o\u00e1n SFP, bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Nhi\u1ec7t \u0111\u1ed9<\/p><\/li>\n\n\n\n<li><p>\u0110i\u1ec7n \u00e1p<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t quang TX<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t quang RX<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c gi\u00e1 tr\u1ecb b\u1ea5t th\u01b0\u1eddng th\u01b0\u1eddng cho th\u1ea5y m\u1ea5t t\u00edn hi\u1ec7u, suy hao s\u1ee3i quang ho\u1eb7c s\u1ef1 c\u1ed1 ph\u1ea7n c\u1ee9ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2714 <strong>Ki\u1ec3m tra v\u00e0 l\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i s\u1ee3i quang<\/strong><br>Ki\u1ec3m tra \u0111\u1ea7u n\u1ed1i LC v\u00e0 c\u00e1p n\u1ed1i s\u1ee3i quang \u0111\u1ec3 ph\u00e1t hi\u1ec7n b\u1ee5i, v\u1ebft x\u01b0\u1edbc ho\u1eb7c nhi\u1ec5m b\u1ea9n. \u0110\u1ea7u n\u1ed1i b\u1ea9n l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y c\u00f4ng su\u1ea5t quang RX th\u1ea5p v\u00e0 k\u1ebft n\u1ed1i s\u1ee3i quang kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2714 <strong>Thay th\u1ebf m\u00f4-\u0111un SFP n\u1ebfu c\u1ea7n thi\u1ebft<\/strong><br>N\u1ebfu k\u1ebft n\u1ed1i v\u1eabn th\u1ea5t b\u1ea1i sau c\u00e1c b\u01b0\u1edbc ki\u1ec3m tra tr\u00ean, h\u00e3y thay m\u00f4-\u0111un SFP b\u1eb1ng b\u1ed9 thu ph\u00e1t \u0111\u00e3 bi\u1ebft l\u00e0 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t. Vi\u1ec7c n\u00e0y gi\u00fap x\u00e1c \u0111\u1ecbnh v\u1ea5n \u0111\u1ec1 b\u1eaft ngu\u1ed3n t\u1eeb m\u00f4-\u0111un hay t\u1eeb th\u00e0nh ph\u1ea7n m\u1ea1ng kh\u00e1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Theo danh s\u00e1ch ki\u1ec3m tra nhanh m\u00f4-\u0111un SFP n\u00e0y <strong>danh s\u00e1ch ki\u1ec3m tra nhanh m\u00f4-\u0111un SFP<\/strong> cho ph\u00e9p k\u1ef9 s\u01b0 m\u1ea1ng ch\u1ea9n \u0111o\u00e1n h\u1ea7u h\u1ebft c\u00e1c s\u1ef1 c\u1ed1 k\u1ebft n\u1ed1i s\u1ee3i quang trong v\u00e0i ph\u00fat. Trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, c\u00e1c b\u01b0\u1edbc \u0111\u01a1n gi\u1ea3n nh\u01b0 x\u00e1c minh t\u00ednh t\u01b0\u01a1ng th\u00edch, l\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i ho\u1eb7c thay th\u1ebf m\u00f4-\u0111un SFP l\u1ed7i c\u00f3 th\u1ec3 kh\u00f4i ph\u1ee5c ho\u1ea1t \u0111\u1ed9ng m\u1ea1ng b\u00ecnh th\u01b0\u1eddng m\u00e0 kh\u00f4ng c\u1ea7n x\u1eed l\u00fd s\u1ef1 c\u1ed1 ph\u1ee9c t\u1ea1p.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u27a1\ufe0f C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 vi\u1ec7c ki\u1ec3m tra m\u00f4-\u0111un SFP<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 <strong>vi\u1ec7c ki\u1ec3m tra m\u00f4-\u0111un SFP<\/strong>, ki\u1ec3m tra b\u1ed9 thu ph\u00e1t quang v\u00e0 x\u00e1c \u0111\u1ecbnh m\u00f4-\u0111un SFP ph\u00f9 h\u1ee3p cho tri\u1ec3n khai m\u1ea1ng.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/51e55182b5ba4238b6cbad8645f3ae28.jpg\" alt=\"FAQs About Checking SFP Modules\" class=\"wp-image-2875\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/51e55182b5ba4238b6cbad8645f3ae28.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/51e55182b5ba4238b6cbad8645f3ae28-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/51e55182b5ba4238b6cbad8645f3ae28-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/51e55182b5ba4238b6cbad8645f3ae28-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/51e55182b5ba4238b6cbad8645f3ae28-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e1ch ki\u1ec3m tra SFP?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 ki\u1ec3m tra m\u00f4-\u0111un SFP, k\u1ef9 s\u01b0 m\u1ea1ng th\u01b0\u1eddng x\u00e1c minh c\u1ea3 vi\u1ec7c l\u1eafp \u0111\u1eb7t v\u1eadt l\u00fd v\u00e0 th\u00f4ng tin ch\u1ea9n \u0111o\u00e1n do thi\u1ebft b\u1ecb m\u1ea1ng cung c\u1ea5p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quy tr\u00ecnh c\u01a1 b\u1ea3n bao g\u1ed3m:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><p>X\u00e1c nh\u1eadn r\u1eb1ng <strong>M\u00f4-\u0111un SFP \u0111\u01b0\u1ee3c c\u1eafm \u0111\u00fang c\u00e1ch<\/strong> v\u00e0o c\u1ed5ng switch<\/p><\/li>\n\n\n\n<li><p>Ki\u1ec3m tra <strong>tr\u1ea1ng th\u00e1i k\u1ebft n\u1ed1i giao di\u1ec7n<\/strong> tr\u00ean b\u1ed9 chuy\u1ec3n m\u1ea1ch<\/p><\/li>\n\n\n\n<li><p>S\u1eed d\u1ee5ng l\u1ec7nh CLI \u0111\u1ec3 \u0111\u1ecdc <strong>ch\u1ea9n \u0111o\u00e1n SFP (DOM\/DDM)<\/strong><\/p><\/li>\n\n\n\n<li><p>X\u00e1c minh <strong>lo\u1ea1i s\u1ee3i quang v\u00e0 k\u1ebft n\u1ed1i c\u00e1p<\/strong><\/p><\/li>\n\n\n\n<li><p>Ki\u1ec3m tra v\u00e0 l\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i s\u1ee3i quang n\u1ebfu c\u1ea7n<\/p><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u01b0\u1edbc n\u00e0y gi\u00fap x\u00e1c \u0111\u1ecbnh v\u1ea5n \u0111\u1ec1 li\u00ean quan \u0111\u1ebfn m\u00f4-\u0111un SFP, c\u00e1p s\u1ee3i quang hay c\u1ea5u h\u00ecnh m\u1ea1ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e1ch ki\u1ec3m tra SFP tr\u00ean b\u1ed9 chuy\u1ec3n m\u1ea1ch Cisco?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00ean b\u1ed9 chuy\u1ec3n m\u1ea1ch Cisco, qu\u1ea3n tr\u1ecb vi\u00ean c\u00f3 th\u1ec3 ki\u1ec3m tra tr\u1ea1ng th\u00e1i SFP b\u1eb1ng nhi\u1ec1u <strong>l\u1ec7nh CLI<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c l\u1ec7nh ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>show interface status<br>show inventory<br>show interfaces transceiver<br>show interfaces transceiver detail<br><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c l\u1ec7nh n\u00e0y cho ph\u00e9p k\u1ef9 s\u01b0:<br><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c minh xem m\u00f4-\u0111un SFP c\u00f3 \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n hay kh\u00f4ng<br><\/p><\/li>\n\n\n\n<li><p>X\u00e1c \u0111\u1ecbnh m\u1eabu v\u00e0 nh\u00e0 cung c\u1ea5p b\u1ed9 thu ph\u00e1t quang (transceiver)<br><\/p><\/li>\n\n\n\n<li><p>\u0110\u1ecdc d\u1eef li\u1ec7u ch\u1ea9n \u0111o\u00e1n quang h\u1ecdc nh\u01b0 nhi\u1ec7t \u0111\u1ed9, \u0111i\u1ec7n \u00e1p, c\u00f4ng su\u1ea5t ph\u00e1t (TX power) v\u00e0 c\u00f4ng su\u1ea5t thu (RX power)<br><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u00f4ng tin n\u00e0y r\u1ea5t c\u1ea7n thi\u1ebft cho vi\u1ec7c ch\u1ea9n \u0111o\u00e1n v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 li\u00ean quan \u0111\u1ebfn SFP.<br>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e1ch ki\u1ec3m tra m\u00f4-\u0111un SFP?<br><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c ki\u1ec3m tra m\u00f4-\u0111un SFP th\u01b0\u1eddng bao g\u1ed3m m\u1ed9t quy tr\u00ecnh x\u00e1c minh t\u1eebng b\u01b0\u1edbc.<br>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u01b0\u1edbc ki\u1ec3m tra \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m:<br><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><p>Th\u1ef1c hi\u1ec7n m\u1ed9t <strong>ki\u1ec3m tra v\u1eadt l\u00fd<br><\/strong> m\u00f4-\u0111un v\u00e0 \u0111\u1ea7u n\u1ed1i s\u1ee3i quang<br><\/p><\/li>\n\n\n\n<li><p>Ki\u1ec3m tra <strong>tr\u1ea1ng th\u00e1i k\u1ebft n\u1ed1i (link status) tr\u00ean giao di\u1ec7n switch<br><\/strong><\/p><\/li>\n\n\n\n<li><p>\u0110\u1ecdc<br> <strong>c\u00e1c gi\u00e1 tr\u1ecb ch\u1ea9n \u0111o\u00e1n quang h\u1ecdc DOM\/DDM<br><\/strong><\/p><\/li>\n\n\n\n<li><p>X\u00e1c minh <strong>t\u00ednh t\u01b0\u01a1ng th\u00edch v\u1ec1 lo\u1ea1i s\u1ee3i quang v\u00e0 b\u01b0\u1edbc s\u00f3ng<br><\/strong><\/p><\/li>\n\n\n\n<li><p>Thay th\u1ebf m\u00f4-\u0111un b\u1eb1ng m\u1ed9t<br> <strong>m\u00f4-\u0111un SFP \u0111\u00e3 bi\u1ebft l\u00e0 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t<br><\/strong> \u0111\u1ec3 c\u00f4 l\u1eadp s\u1ef1 c\u1ed1<br><\/p><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y gi\u00fap x\u00e1c \u0111\u1ecbnh xem ch\u00ednh m\u00f4-\u0111un SFP c\u00f3 b\u1ecb l\u1ed7i hay kh\u00f4ng, hay v\u1ea5n \u0111\u1ec1 do<br> <strong>c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ee3i quang ho\u1eb7c c\u1ed5ng switch g\u00e2y ra<br><\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 bi\u1ebft n\u00ean s\u1eed d\u1ee5ng m\u00f4-\u0111un SFP n\u00e0o?<br><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1ef1a ch\u1ecdn m\u00f4-\u0111un SFP ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u th\u00f4ng s\u1ed1 m\u1ea1ng:<br><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>T\u1ed1c \u0111\u1ed9<\/strong> \u2014 1G, 10G ho\u1eb7c 25G<br><\/p><\/li>\n\n\n\n<li><p><strong><p>Switch model support list<\/p><\/strong> \u2014 s\u1ee3i quang \u0111a mode (MMF) ho\u1eb7c \u0111\u01a1n mode (SMF)<br><\/p><\/li>\n\n\n\n<li><p><strong>Kho\u1ea3ng c\u00e1ch truy\u1ec1n t\u1ea3i<\/strong> \u2014 t\u1ea7m xa ng\u1eafn, trung b\u00ecnh ho\u1eb7c d\u00e0i<br><\/p><\/li>\n\n\n\n<li><p><strong>B\u01b0\u1edbc s\u00f3ng<br><\/strong> \u2014 th\u01b0\u1eddng l\u00e0 850 nm, 1310 nm ho\u1eb7c 1550 nm<br><\/p><\/li>\n\n\n\n<li><p><strong><p>Fiber type<\/p><\/strong> \u2014 ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 \u0111\u1ea7u n\u1ed1i LC duplex<br><\/p><\/li>\n<\/ul>\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><strong>SFP+ 10GBASE-SR<\/strong> \u2192 s\u1ee3i quang \u0111a mode, kho\u1ea3ng c\u00e1ch ng\u1eafn (li\u00ean k\u1ebft trung t\u00e2m d\u1eef li\u1ec7u)<br><\/p><\/li>\n\n\n\n<li><p><strong>SFP+ 10GBASE-LR<\/strong> \u2192 s\u1ee3i quang \u0111\u01a1n mode, k\u1ebft n\u1ed1i l\u00ean t\u1edbi 10 km<br><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c kh\u1edbp c\u00e1c th\u00f4ng s\u1ed1 n\u00e0y \u0111\u1ea3m b\u1ea3o k\u1ebft n\u1ed1i s\u1ee3i quang \u1ed5n \u0111\u1ecbnh v\u00e0 t\u01b0\u01a1ng th\u00edch v\u1edbi thi\u1ebft b\u1ecb m\u1ea1ng.<br>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u27a1\ufe0f K\u1ebft lu\u1eadn: C\u00e1ch ki\u1ec3m tra v\u00e0 x\u00e1c minh m\u00f4-\u0111un SFP m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3<br><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c ki\u1ec3m tra m\u00f4-\u0111un SFP l\u00e0 m\u1ed9t nhi\u1ec7m v\u1ee5 thi\u1ebft y\u1ebfu nh\u1eb1m duy tr\u00ec<br> <strong>kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i m\u1ea1ng s\u1ee3i quang \u1ed5n \u0111\u1ecbnh<br><\/strong>. V\u00ec b\u1ed9 thu ph\u00e1t SFP ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea7ng v\u1eadt l\u00fd c\u1ee7a m\u1ea1ng, b\u1ea5t k\u1ef3 s\u1ef1 c\u1ed1 n\u00e0o li\u00ean quan \u0111\u1ebfn m\u00f4-\u0111un\u2014nh\u01b0 l\u1eafp \u0111\u1eb7t sai, suy hao t\u00edn hi\u1ec7u quang ho\u1eb7c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch\u2014\u0111\u1ec1u c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng ngay l\u1eadp t\u1ee9c \u0111\u1ebfn hi\u1ec7u su\u1ea5t k\u1ebft n\u1ed1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch tu\u00e2n theo m\u1ed9t quy tr\u00ecnh c\u00f3 c\u1ea5u tr\u00fac, k\u1ef9 s\u01b0 m\u1ea1ng c\u00f3 th\u1ec3 nhanh ch\u00f3ng ch\u1ea9n \u0111o\u00e1n v\u00e0 x\u00e1c minh c\u00e1c module SFP. Quy tr\u00ecnh n\u00e0y th\u01b0\u1eddng bao g\u1ed3m vi\u1ec7c ki\u1ec3m tra tr\u1ea1ng th\u00e1i giao di\u1ec7n tr\u00ean switch, xem l\u1ea1i d\u1eef li\u1ec7u ch\u1ea9n \u0111o\u00e1n SFP (d\u1eef li\u1ec7u DOM\/DDM) nh\u01b0 nhi\u1ec7t \u0111\u1ed9 v\u00e0 c\u00f4ng su\u1ea5t quang, c\u0169ng nh\u01b0 x\u00e1c nh\u1eadn r\u1eb1ng module ph\u00f9 h\u1ee3p v\u1edbi lo\u1ea1i s\u1ee3i quang, kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn v\u00e0 y\u00eau c\u1ea7u b\u01b0\u1edbc s\u00f3ng \u0111\u00fang.<\/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\/b1726197f5e64a7dae6a3c0970dbe174.jpg\" alt=\"How to Check and Verify SFP Modules Efficiently\" class=\"wp-image-2876\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b1726197f5e64a7dae6a3c0970dbe174.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b1726197f5e64a7dae6a3c0970dbe174-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b1726197f5e64a7dae6a3c0970dbe174-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b1726197f5e64a7dae6a3c0970dbe174-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b1726197f5e64a7dae6a3c0970dbe174-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">C\u0169ng quan tr\u1ecdng kh\u00f4ng k\u00e9m l\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch gi\u1eefa m\u00f4-\u0111un SFP v\u00e0 thi\u1ebft b\u1ecb m\u1ea1ng. Vi\u1ec7c s\u1eed d\u1ee5ng \u0111\u00fang lo\u1ea1i m\u00f4-\u0111un\u2014d\u00f9 l\u00e0 <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26155-1g-sfp.htm\">SFP 1G<\/a>, <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26192-10g-sfp.htm\">SFP+ 10G<\/a>, or <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26225-25g-sfp28.htm\">SFP28 25G<\/a>\u2014v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi ti\u00eau chu\u1ea9n quang h\u1ecdc ch\u00ednh x\u00e1c (v\u00ed d\u1ee5 nh\u01b0 SR ho\u1eb7c LR) gi\u00fap ng\u0103n ng\u1eeba c\u00e1c l\u1ed7i do m\u00f4-\u0111un kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 v\u00e0 s\u1ef1 c\u1ed1 m\u1ea5t k\u1ebft n\u1ed1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi ph\u00e1t sinh s\u1ef1 c\u1ed1, vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 SFP hi\u1ec7u qu\u1ea3 th\u01b0\u1eddng bao g\u1ed3m ki\u1ec3m tra k\u1ebft n\u1ed1i s\u1ee3i quang, l\u00e0m s\u1ea1ch c\u00e1c \u0111\u1ea7u n\u1ed1i v\u00e0 thay th\u1ebf m\u00f4-\u0111un b\u1eb1ng m\u1ed9t b\u1ed9 thu-ph\u00e1t \u0111\u00e3 bi\u1ebft l\u00e0 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch k\u1ebft h\u1ee3p gi\u00e1m s\u00e1t ch\u1ea9n \u0111o\u00e1n, ki\u1ec3m tra t\u00ednh t\u01b0\u01a1ng th\u00edch v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 theo quy tr\u00ecnh h\u1ec7 th\u1ed1ng, k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh nhanh ch\u00f3ng c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 duy tr\u00ec hi\u1ec7u su\u1ea5t m\u1ea1ng s\u1ee3i quang \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 c\u00f3 k\u1ebft n\u1ed1i quang \u0111\u00e1ng tin c\u1eady v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed, b\u1ea1n c\u00f3 th\u1ec3 kh\u00e1m ph\u00e1 <strong>c\u00e1c m\u00f4-\u0111un SFP v\u00e0 SFP+ t\u01b0\u01a1ng th\u00edch t\u1ea1i <\/strong><a target=\"_self\" href=\"https:\/\/www.l-p.com\/\"><strong>C\u1eeda h\u00e0ng Ch\u00ednh th\u1ee9c LINK-PP<\/strong><\/a>, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 h\u1ed7 tr\u1ee3 nhi\u1ec1u lo\u1ea1i c\u00f4ng t\u1eafc doanh nghi\u1ec7p, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn v\u00e0 m\u00f4i tr\u01b0\u1eddng m\u1ea1ng trung t\u00e2m d\u1eef li\u1ec7u.<\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u c\u00e1ch ki\u1ec3m tra m\u00f4-\u0111un SFP b\u1eb1ng c\u00e1c l\u1ec7nh Cisco, ch\u1ea9n \u0111o\u00e1n v\u00e0 ki\u1ec3m tra t\u00ednh t\u01b0\u01a1ng th\u00edch. H\u01b0\u1edbng d\u1eabn t\u1eebng b\u01b0\u1edbc \u0111\u1ec3 ki\u1ec3m tra quang h\u1ecdc SFP v\u00e0 l\u1ef1a ch\u1ecdn m\u00f4-\u0111un ph\u00f9 h\u1ee3p.<\/p>","protected":false},"author":1,"featured_media":2877,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[26],"class_list":["post-2878","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2878","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=2878"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2878\/revisions"}],"predecessor-version":[{"id":10753,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2878\/revisions\/10753"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/2877"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=2878"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=2878"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=2878"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}