{"id":3877,"date":"2025-10-15T11:12:00","date_gmt":"2025-10-15T11:12:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/lldp-in-power-over-ethernet-systems\/"},"modified":"2026-06-09T10:24:13","modified_gmt":"2026-06-09T10:24:13","slug":"lldp-in-power-over-ethernet-systems","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/lldp-in-power-over-ethernet-systems","title":{"rendered":"Vai tr\u00f2 c\u1ee7a LLDP (Giao th\u1ee9c Ph\u00e1t hi\u1ec7n L\u1edbp Li\u00ean k\u1ebft) trong c\u00e1c H\u1ec7 th\u1ed1ng PoE"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/64dc20de66534180aa6e664412b53ca3.webp\" alt=\"LLDP (Link Layer Discovery Protocol)\" class=\"wp-image-3874\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/64dc20de66534180aa6e664412b53ca3.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/64dc20de66534180aa6e664412b53ca3-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/64dc20de66534180aa6e664412b53ca3-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/64dc20de66534180aa6e664412b53ca3-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/64dc20de66534180aa6e664412b53ca3-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Khi Power over Ethernet (PoE) ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, <strong>th\u01b0\u01a1ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00f4ng minh<\/strong> \u0111\u00e3 tr\u1edf n\u00ean thi\u1ebft y\u1ebfu \u0111\u1ec3 qu\u1ea3n l\u00fd ng\u00e2n s\u00e1ch \u0111i\u1ec7n v\u00e0 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t m\u1ea1ng. <strong>Giao th\u1ee9c Ph\u00e1t hi\u1ec7n L\u1edbp Li\u00ean k\u1ebft (LLDP)<\/strong>, \u0111\u01b0\u1ee3c chu\u1ea9n h\u00f3a theo <strong>IEEE 802.1AB<\/strong>, \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c k\u00edch ho\u1ea1t kh\u1ea3 n\u0103ng giao ti\u1ebfp gi\u1eefa <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/poe-pse-power-sourcing-equipment-guide\/\"><strong>PSE (Thi\u1ebft b\u1ecb C\u1ea5p ngu\u1ed3n)<\/strong><\/a> and <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/poe-pd-powered-device-guide\/\"><strong>PD (Thi\u1ebft b\u1ecb \u0110\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n)<\/strong><\/a>. B\u1eb1ng c\u00e1ch m\u1edf r\u1ed9ng c\u00e1c kh\u1ea3 n\u0103ng c\u01a1 b\u1ea3n c\u1ee7a PoE, LLDP \u0111\u1ea3m b\u1ea3o vi\u1ec7c cung c\u1ea5p \u0111i\u1ec7n an to\u00e0n, linh ho\u1ea1t v\u00e0 hi\u1ec7u qu\u1ea3 tr\u00ean c\u00e1c c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng Ethernet hi\u1ec7n \u0111\u1ea1i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u2705 LLDP l\u00e0 g\u00ec v\u00e0 V\u00ec sao LLDP quan tr\u1ecdng trong PoE<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">LLDP l\u00e0 m\u1ed9t <strong>giao th\u1ee9c m\u1ea1ng l\u1edbp 2<\/strong> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 cho ph\u00e9p c\u00e1c thi\u1ebft b\u1ecb Ethernet c\u00f4ng b\u1ed1 danh t\u00ednh, kh\u1ea3 n\u0103ng v\u00e0 c\u1ea5u h\u00ecnh c\u1ee7a ch\u00fang t\u1edbi c\u00e1c thi\u1ebft b\u1ecb \u0111\u1ed3ng c\u1ea5p k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp.<br\/>In <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-you-need-to-know-about-power-over-ethernet\/\">Trong c\u00e1c m\u1ea1ng PoE<\/a>, LLDP cung c\u1ea5p <strong>k\u00eanh giao ti\u1ebfp<\/strong> cho ph\u00e9p PSE (v\u00ed d\u1ee5: b\u1ed9 chuy\u1ec3n m\u1ea1ch PoE) hi\u1ec3u r\u00f5 y\u00eau c\u1ea7u <strong>c\u00f4ng su\u1ea5t c\u1ee5 th\u1ec3<\/strong>, c\u1ee7a PD, v\u01b0\u1ee3t ra ngo\u00e0i giai \u0111o\u1ea1n ph\u00e2n lo\u1ea1i ph\u1ea7n c\u1ee9ng c\u1ed1 \u0111\u1ecbnh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu kh\u00f4ng c\u00f3 LLDP, c\u00e1c h\u1ec7 th\u1ed1ng PoE ch\u1ec9 d\u1ef1a v\u00e0o c\u00e1c l\u1edbp c\u00f4ng su\u1ea5t \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh tr\u01b0\u1edbc\u2014th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn vi\u1ec7c c\u1ea5p qu\u00e1 m\u1ee9c ho\u1eb7c thi\u1ebfu m\u1ee9c. V\u1edbi LLDP, c\u00f4ng su\u1ea5t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed5 \u0111\u1ed9ng d\u1ef1a tr\u00ean nhu c\u1ea7u th\u1ef1c t\u1ebf c\u1ee7a thi\u1ebft b\u1ecb.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u2705 C\u00e1ch LLDP k\u00edch ho\u1ea1t Th\u01b0\u01a1ng l\u01b0\u1ee3ng C\u00f4ng su\u1ea5t Th\u00f4ng minh<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >Quy tr\u00ecnh Th\u01b0\u01a1ng l\u01b0\u1ee3ng C\u00f4ng su\u1ea5t PoE<\/h3>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p><strong>Detection:<\/strong><br\/>PSE \u0111\u1ea7u ti\u00ean ph\u00e1t hi\u1ec7n PD h\u1ee3p l\u1ec7 b\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng \u0111i\u1ec7n \u00e1p d\u00f2 th\u1ea5p v\u00e0 ki\u1ec3m tra ch\u1eef k\u00fd PoE c\u1ee7a thi\u1ebft b\u1ecb.<\/p><\/li><li><p><strong>Classification:<\/strong><br\/>Theo c\u00e1c ti\u00eau chu\u1ea9n IEEE 802.3af\/at\/bt, PSE ph\u00e2n lo\u1ea1i PD v\u00e0o m\u1ed9t l\u1edbp c\u00f4ng su\u1ea5t (v\u00ed d\u1ee5: L\u1edbp 0\u20138).<\/p><\/li><li><p><strong>Trao \u0111\u1ed5i LLDP:<\/strong><br\/>Sau khi thi\u1ebft l\u1eadp li\u00ean k\u1ebft m\u1ea1ng, PSE v\u00e0 PD s\u1eed d\u1ee5ng <strong>khung LLDP<\/strong>\u2014c\u1ee5 th\u1ec3 l\u00e0 tr\u01b0\u1eddng gi\u00e1 tr\u1ecb TLV <strong>\u201cC\u1ea5p ngu\u1ed3n qua MDI (Giao di\u1ec7n Ph\u1ee5 thu\u1ed9c M\u00f4i tr\u01b0\u1eddng Truy\u1ec1n)\u201d<\/strong>\u2014\u0111\u1ec3 th\u01b0\u01a1ng l\u01b0\u1ee3ng <strong>m\u1ee9c watt ch\u00ednh x\u00e1c<\/strong> c\u1ea7n thi\u1ebft.<\/p><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c th\u01b0\u01a1ng l\u01b0\u1ee3ng d\u1ef1a tr\u00ean LLDP n\u00e0y cho ph\u00e9p PD y\u00eau c\u1ea7u c\u00e1c m\u1ee9c c\u00f4ng su\u1ea5t t\u00f9y ch\u1ec9nh (v\u00ed d\u1ee5: 7,5W thay v\u00ec to\u00e0n b\u1ed9 15,4W), gi\u00fap PSE t\u1ed1i \u01b0u h\u00f3a t\u1ed5ng ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t c\u1ee7a m\u00ecnh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c TLV c\u1ee7a LLDP \u0111\u01b0\u1ee3c S\u1eed d\u1ee5ng cho Qu\u1ea3n l\u00fd C\u00f4ng su\u1ea5t<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong b\u1ed1i c\u1ea3nh PoE, LLDP truy\u1ec1n th\u00f4ng s\u1ed1 c\u00f4ng su\u1ea5t th\u00f4ng qua <strong>TLV<\/strong> (tr\u01b0\u1eddng Ki\u1ec3u\u2013\u0110\u1ed9 d\u00e0i\u2013Gi\u00e1 tr\u1ecb), v\u00ed d\u1ee5 nh\u01b0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>C\u00f4ng su\u1ea5t Y\u00eau c\u1ea7u \/ \u0110\u01b0\u1ee3c C\u1ea5p<\/strong> (Watt)<\/p><\/li><li><p><strong>Ngu\u1ed3n C\u00f4ng su\u1ea5t<\/strong> (PSE, PD ho\u1eb7c c\u1ea3 hai)<\/p><\/li><li><p><strong>\u0110\u1ed9 \u01afu ti\u00ean C\u00f4ng su\u1ea5t<\/strong><\/p><\/li><li><p><strong>Lo\u1ea1i Ph\u00e2n lo\u1ea1i PD<\/strong><\/p><\/li><li><p><strong>Gh\u00e9p n\u1ed1i ngu\u1ed3n v\u00e0 ch\u1ebf \u0111\u1ed9 (A\/B)<\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c TLV n\u00e0y cho ph\u00e9p <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/poe-pse-power-sourcing-equipment-guide\/\">PSE<\/a> and <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/poe-pd-powered-device-guide\/\">Thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n (PD)<\/a> \u201cth\u01b0\u01a1ng l\u01b0\u1ee3ng\u201d vi\u1ec7c s\u1eed d\u1ee5ng n\u0103ng l\u01b0\u1ee3ng m\u1ed9t c\u00e1ch th\u00f4ng minh, cho ph\u00e9p \u0111i\u1ec1u ch\u1ec9nh th\u1eddi gian th\u1ef1c khi thi\u1ebft b\u1ecb thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng (v\u00ed d\u1ee5: ch\u1ebf \u0111\u1ed9 ng\u1ee7 ho\u1eb7c ph\u00e1t tr\u1ef1c ti\u1ebfp video).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u2705 \u01afu \u0111i\u1ec3m c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng LLDP trong m\u1ea1ng PoE<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >\u2605 1. C\u1ea5p ph\u00e1t c\u00f4ng su\u1ea5t \u0111\u1ed9ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">LLDP cho ph\u00e9p <strong>th\u01b0\u01a1ng l\u01b0\u1ee3ng c\u00f4ng su\u1ea5t d\u1ef1a tr\u00ean ph\u1ea7n m\u1ec1m<\/strong>, cho ph\u00e9p <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/poe-pd-powered-device-guide\/\">c\u00e1c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n (PD)<\/a> ch\u1ec9 y\u00eau c\u1ea7u m\u1ee9c c\u00f4ng su\u1ea5t c\u1ea7n thi\u1ebft. \u0110i\u1ec1u n\u00e0y t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t n\u0103ng l\u01b0\u1ee3ng v\u00e0 ng\u0103n ng\u1eeba vi\u1ec7c c\u1ea5p qu\u00e1 m\u1ee9c kh\u00f4ng c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u2605 2. Ki\u1ec3m so\u00e1t ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t n\u00e2ng cao<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi c\u00e1c tri\u1ec3n khai quy m\u00f4 l\u1edbn\u2014nh\u01b0 t\u00f2a nh\u00e0 th\u00f4ng minh ho\u1eb7c h\u1ec7 th\u1ed1ng gi\u00e1m s\u00e1t IP doanh nghi\u1ec7p\u2014LLDP gi\u00fap qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng theo d\u00f5i v\u00e0 qu\u1ea3n l\u00fd <strong>t\u1ed5ng m\u1ee9c ti\u00eau th\u1ee5 c\u00f4ng su\u1ea5t<\/strong> tr\u00ean to\u00e0n b\u1ed9 c\u00e1c c\u1ed5ng PoE.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u2605 3. T\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">LLDP l\u00e0 <strong>\u0111\u1ed9c l\u1eadp v\u1edbi nh\u00e0 s\u1ea3n xu\u1ea5t<\/strong>, kh\u00e1c v\u1edbi c\u00e1c giao th\u1ee9c kh\u00e1m ph\u00e1 ri\u00eang bi\u1ec7t. N\u00f3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb PoE t\u1eeb c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t kh\u00e1c nhau, r\u1ea5t ph\u00f9 h\u1ee3p cho <strong>m\u1ea1ng \u0111a nh\u00e0 cung c\u1ea5p<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u2605 4. \u0110\u1ed9 an to\u00e0n v\u00e0 \u0111\u1ed9 tin c\u1eady<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch cho ph\u00e9p truy\u1ec1n th\u00f4ng gi\u1eefa thi\u1ebft b\u1ecb c\u1ea5p ngu\u1ed3n (PSE) v\u00e0 thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n (PD), LLDP ng\u0103n ng\u1eeba vi\u1ec7c cung c\u1ea5p c\u00f4ng su\u1ea5t kh\u00f4ng ph\u00f9 h\u1ee3p v\u00e0 nguy c\u01a1 h\u01b0 h\u1ea1i thi\u1ebft b\u1ecb, \u0111\u1ea3m b\u1ea3o <strong>ho\u1ea1t \u0111\u1ed9ng PoE \u1ed5n \u0111\u1ecbnh<\/strong> ngay c\u1ea3 trong c\u00e1c m\u00f4i tr\u01b0\u1eddng h\u1ed7n h\u1ee3p.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u2705 LLDP v\u00e0 c\u00e1c ti\u00eau chu\u1ea9n IEEE PoE<\/h2>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 146px;\"\/><col style=\"width: 195px;\"\/><col style=\"width: 126px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"146\"><p><strong>Ti\u00eau chu\u1ea9n PoE<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\" colwidth=\"195\"><p><strong>Lo\u1ea1i<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\" colwidth=\"126\"><p><strong>C\u00f4ng su\u1ea5t t\u1ed1i \u0111a (PSE)<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>Vai tr\u00f2 c\u1ee7a LLDP<\/strong><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"146\"><p>IEEE 802.3af<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"195\"><p>PoE (Lo\u1ea1i 1)<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"126\"><p>15,4 W<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u00f9y ch\u1ecdn<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"146\"><p>IEEE 802.3at<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"195\"><p>PoE+ (Lo\u1ea1i 2)<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"126\"><p>30 W<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Gi\u1edbi thi\u1ec7u c\u01a1 ch\u1ebf th\u01b0\u01a1ng l\u01b0\u1ee3ng qua LLDP<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"146\"><p>IEEE 802.3bt<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"195\"><p>PoE++ (Lo\u1ea1i 3 &amp; 4)<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"126\"><p>60\u201390 W<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Qu\u1ea3n l\u00fd c\u00f4ng su\u1ea5t d\u1ef1a tr\u00ean LLDP l\u00e0 b\u1eaft bu\u1ed9c<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Theo <strong>IEEE 802.3bt<\/strong>, LLDP kh\u00f4ng ch\u1ec9 l\u00e0 t\u00f9y ch\u1ecdn\u2014m\u00e0 l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu.<br\/>C\u00e1c thi\u1ebft b\u1ecb Lo\u1ea1i 3 v\u00e0 Lo\u1ea1i 4 ph\u1ee5 thu\u1ed9c v\u00e0o LLDP \u0111\u1ec3 th\u01b0\u01a1ng l\u01b0\u1ee3ng m\u1ee9c c\u00f4ng su\u1ea5t ch\u00ednh x\u00e1c l\u00ean \u0111\u1ebfn 90 ho\u1eb7c 100 watt m\u1ed7i c\u1ed5ng.<\/p><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" >\u2705 LLDP-MED: M\u1edf r\u1ed9ng LLDP cho tho\u1ea1i v\u00e0 IoT<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>LLDP-MED (Kh\u00e1m ph\u00e1 \u0111i\u1ec3m cu\u1ed1i ph\u01b0\u01a1ng ti\u1ec7n)<\/strong>, m\u1ed9t ph\u1ea7n m\u1edf r\u1ed9ng \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a b\u1edfi <strong>ANSI\/TIA-1057<\/strong>, n\u00e2ng cao th\u00eam kh\u1ea3 n\u0103ng qu\u1ea3n l\u00fd PoE cho c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 \u0111i\u1ec7n tho\u1ea1i IP v\u00e0 c\u00e1c <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/iot-internet-of-things-definition-and-real-world-examples\/\">thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i IoT th\u00f4ng minh<\/a>.<br\/>N\u00f3 h\u1ed7 tr\u1ee3 c\u00e1c t\u00ednh n\u0103ng nh\u01b0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>G\u00e1n t\u1ef1 \u0111\u1ed9ng <strong>VLAN tho\u1ea1i<\/strong><\/p><\/li><li><p><strong>Thi\u1ebft l\u1eadp ch\u00ednh s\u00e1ch c\u00f4ng su\u1ea5t<\/strong> cho c\u00e1c \u0111i\u1ec3m cu\u1ed1i<\/p><\/li><li><p><strong>Th\u00f4ng tin v\u1ecb tr\u00ed<\/strong> ph\u1ee5c v\u1ee5 d\u1ecbch v\u1ee5 kh\u1ea9n c\u1ea5p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">LLDP-MED \u0111\u1ea3m b\u1ea3o c\u00e1c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n nh\u01b0 \u0111i\u1ec7n tho\u1ea1i VoIP t\u1ef1 \u0111\u1ed9ng nh\u1eadn \u0111\u00fang m\u1ee9c c\u00f4ng su\u1ea5t, \u0111\u1ed9 \u01b0u ti\u00ean v\u00e0 QoS\u2014gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c tri\u1ec3n khai trong m\u1ea1ng doanh nghi\u1ec7p.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u2705 Gi\u1ea3i ph\u00e1p PoE LINK-PP t\u01b0\u01a1ng th\u00edch v\u1edbi LLDP<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">L\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t linh ki\u1ec7n PoE \u0111\u00e1ng tin c\u1eady, <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\"><strong>LINK-PP<\/strong><\/a> cung c\u1ea5p m\u1ed9t lo\u1ea1t r\u1ed9ng c\u00e1c <strong>B\u1ed9 k\u1ebft n\u1ed1i PoE RJ45<\/strong> and <strong>B\u1ed9 bi\u1ebfn \u00e1p LAN<\/strong> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho thi\u1ebft b\u1ecb PSE v\u00e0 PD h\u1ed7 tr\u1ee3 th\u01b0\u01a1ng l\u01b0\u1ee3ng LLDP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch t\u00edch h\u1ee3p nh\u1eefng th\u00e0nh ph\u1ea7n n\u00e0y, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t m\u1ea1ng c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o vi\u1ec7c cung c\u1ea5p PoE \u0111\u00e1ng tin c\u1eady, truy\u1ec1n th\u00f4ng LLDP ch\u00ednh x\u00e1c v\u00e0 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c h\u1ec7 th\u1ed1ng Ethernet hi\u1ec7n \u0111\u1ea1i.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/43566d8a944c404c87b28037fdc857c8.png\" alt=\"PoE RJ45 connectors\" class=\"wp-image-3875\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/43566d8a944c404c87b28037fdc857c8.png 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/43566d8a944c404c87b28037fdc857c8-300x178.png 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/43566d8a944c404c87b28037fdc857c8-1024x608.png 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/43566d8a944c404c87b28037fdc857c8-768x456.png 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/43566d8a944c404c87b28037fdc857c8-18x12.png 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\u2705 K\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>Giao th\u1ee9c Ph\u00e1t hi\u1ec7n L\u1edbp Li\u00ean k\u1ebft (LLDP)<\/strong> v\u01b0\u1ee3t xa m\u1ed9t c\u00f4ng c\u1ee5 kh\u00e1m ph\u00e1 t\u00f4-p\u00f4\u2014\u0111\u00f3 l\u00e0 m\u1ed9t <strong>b\u1ed9 k\u00edch ho\u1ea1t c\u1ed1t l\u00f5i cho ho\u1ea1t \u0111\u1ed9ng PoE th\u00f4ng minh<\/strong>.<br\/>Th\u00f4ng qua c\u00e1c TLV \u201cPower via MDI\u201d chu\u1ea9n h\u00f3a c\u1ee7a m\u00ecnh, LLDP cho ph\u00e9p c\u00e1c thi\u1ebft b\u1ecb PSE v\u00e0 PD <strong>trao \u0111\u1ed5i nhu c\u1ea7u c\u00f4ng su\u1ea5t m\u1ed9t c\u00e1ch \u0111\u1ed9ng<\/strong>, t\u1eeb \u0111\u00f3 n\u00e2ng cao hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng n\u0103ng l\u01b0\u1ee3ng, \u0111\u1ed9 an to\u00e0n v\u00e0 kh\u1ea3 n\u0103ng qu\u1ea3n l\u00fd tr\u00ean c\u00e1c m\u1ea1ng ph\u1ee9c t\u1ea1p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong m\u00f4i tr\u01b0\u1eddng IoT v\u00e0 doanh nghi\u1ec7p hi\u1ec7n nay nh\u1ea1y c\u1ea3m v\u1edbi \u0111i\u1ec7n n\u0103ng, vi\u1ec7c \u00e1p d\u1ee5ng c\u00f4ng ngh\u1ec7 PoE h\u1ed7 tr\u1ee3 LLDP\u2014\u0111\u01b0\u1ee3c h\u1eadu thu\u1eabn b\u1edfi c\u00e1c th\u00e0nh ph\u1ea7n hi\u1ec7u n\u0103ng cao nh\u01b0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/474069.htm\"><strong>b\u1ed9 k\u1ebft n\u1ed1i RJ45 PoE c\u1ee7a LINK-PP<\/strong><\/a>\u2014l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng Ethernet c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 b\u1ec1n v\u1eefng trong t\u01b0\u01a1ng lai.<\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u c\u00e1ch giao th\u1ee9c kh\u00e1m ph\u00e1 l\u1edbp li\u00ean k\u1ebft (LLDP - Link Layer Discovery Protocol) n\u00e2ng cao c\u00e1c h\u1ec7 th\u1ed1ng PoE th\u00f4ng qua th\u01b0\u01a1ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00f4ng minh, qu\u1ea3n l\u00fd n\u0103ng l\u01b0\u1ee3ng hi\u1ec7u qu\u1ea3 v\u00e0 ph\u00e1t hi\u1ec7n thi\u1ebft b\u1ecb trong c\u00e1c m\u1ea1ng Ethernet hi\u1ec7n \u0111\u1ea1i.<\/p>","protected":false},"author":1,"featured_media":3876,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[22],"class_list":["post-3877","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-integrated-rj45-connectors"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3877","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=3877"}],"version-history":[{"count":3,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3877\/revisions"}],"predecessor-version":[{"id":9225,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3877\/revisions\/9225"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/3876"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=3877"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=3877"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=3877"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}