{"id":1375,"date":"2023-08-01T17:19:15","date_gmt":"2023-08-01T10:19:15","guid":{"rendered":"https:\/\/lagonet.vn\/?p=1357"},"modified":"2023-08-01T17:19:15","modified_gmt":"2023-08-01T10:19:15","slug":"vxlan-la-gi-gioi-thieu-tong-quan-ve-cong-nghe-vxlan","status":"publish","type":"post","link":"https:\/\/kb.lagonet.vn\/?p=1375","title":{"rendered":"VXLAN l\u00e0 g\u00ec? Gi\u1edbi thi\u1ec7u t\u1ed5ng quan v\u1ec1 c\u00f4ng ngh\u1ec7 VXLAN"},"content":{"rendered":"<h1>VXLAN l\u00e0 g\u00ec? Gi\u1edbi thi\u1ec7u t\u1ed5ng quan v\u1ec1 c\u00f4ng ngh\u1ec7 VXLAN<\/h1>\n<p>Tr\u01b0\u1edbc \u0111\u00e2y, trong c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u th\u01b0\u1eddng s\u1eed d\u1ee5ng m\u00f4 h\u00ecnh Core &#8211; Distribute &#8211; Access v\u1edbi c\u00e1c c\u00f4ng ngh\u1ec7 nh\u01b0 VLAN \u0111\u1ec3 c\u00f4 l\u1eadp m\u1ea1ng l\u1edbp 2. V\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n nhanh ch\u00f3ng trong c\u00e1c DC,\u00a0gi\u1edbi h\u1ea1n\u00a04096 VLAN c\u0169ng nh\u01b0 h\u1ea1n ch\u1ebf trong vi\u1ec7c tri\u1ec3n khai kh\u00f4ng \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c nhu c\u1ea7u trong c\u00e1c Data center. VXLAN \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf c\u00f9ng v\u1edbi m\u00f4 h\u00ecnh Leaf-Spine \u0111ang d\u1ea7n thay th\u1ebf c\u00e1c m\u00f4 h\u00ecnh c\u0169.<\/p>\n<h2>VXLAN l\u00e0 g\u00ec?<\/h2>\n<p>VXLAN l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a\u00a0Virtual Extensible LAN,\u00a0\u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong RFC 7348 l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7\u00a0overlay\u00a0\u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 cung c\u1ea5p c\u00e1c d\u1ecbch v\u1ee5 k\u1ebft n\u1ed1i Layer 2 v\u00e0 Layer 3 th\u00f4ng qua m\u1ea1ng IP. M\u1ea1ng IP cung c\u1ea5p kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng, hi\u1ec7u su\u1ea5t c\u00e2n b\u1eb1ng v\u00e0 kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i khi c\u00f3 l\u1ed7i x\u1ea3y ra. VXLAN \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y b\u1eb1ng c\u00e1ch t\u1ea1o c\u00e1c Frames\u00a0Layer 2 b\u00ean trong IP Packets. VXLAN ch\u1ec9 y\u00eau c\u1ea7u kh\u1ea3 n\u0103ng giao ti\u1ebfp IP gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb bi\u00ean trong m\u00f4 h\u00ecnh VXLAN, \u0111\u01b0\u1ee3c cung c\u1ea5p b\u1edfi c\u00e1c giao th\u1ee9c \u0111\u1ecbnh tuy\u1ebfn.<\/p>\n<h2><img decoding=\"async\" src=\"https:\/\/cnttshop.vn\/storage\/Bai-Viet\/Cisco\/VXLAN\/vxlan-la-gi-min.JPG\" alt=\"M\u00f4 h\u00ecnh t\u1ed5ng quan c\u1ee7a VXLAN\" \/>VXLAN Packet Format<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/cnttshop.vn\/storage\/Bai-Viet\/Cisco\/VXLAN\/VXLAN-encapsulation-min.png\" alt=\"VXLAN packet format\" \/>VXLAN s\u1eed d\u1ee5ng 8 byte Header bao g\u1ed3m m\u00e3 \u0111\u1ecbnh danh 24 bit (VNID) v\u00e0 nhi\u1ec1u bit d\u00e0nh ri\u00eang.\u00a0\u00a0VNID g\u1ed3m 24 bit \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c ph\u00e2n \u0111o\u1ea1n L\u1edbp 2 v\u00e0 \u0111\u1ec3 duy tr\u00ec s\u1ef1 c\u00e1ch ly L\u1edbp 2 gi\u1eefa c\u00e1c ph\u00e2n \u0111o\u1ea1n.\u00a0V\u1edbi 24 bit \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed5 cho VNID, VXLAN c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 t\u1edbi 16 tri\u1ec7u ph\u00e2n \u0111o\u1ea1n logic.<\/p>\n<h2>C\u00e1c kh\u00e1i ni\u1ec7m trong VXLAN<\/h2>\n<ul>\n<li><strong>VTEP \u2013 Virtual Tunnel Endpoint:<\/strong>\u00a0l\u00e0 c\u00e1c thi\u1ebft b\u1ecb ph\u1ea7n c\u1ee9ng ho\u1eb7c ph\u1ea7n m\u1ec1m, \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf c\u00e1c v\u00f9ng bi\u00ean c\u1ee7a m\u1ea1ng,\u00a0ch\u1ecbu tr\u00e1ch nhi\u1ec7m kh\u1edfi t\u1ea1o VXLAN Tunnel v\u00e0 th\u1ef1c hi\u1ec7n \u0111\u00f3ng g\u00f3i v\u00e0 gi\u1ea3i m\u00e3 VXLAN<\/li>\n<li><strong>VNI \u2013 Virtual Network Instance:<\/strong>\u00a0l\u00e0 1 m\u1ea1ng logic cung c\u1ea5p c\u00e1c d\u1ecbch v\u1ee5 l\u1edbp 2 ho\u1eb7c l\u1edbp 3, v\u00e0 \u0111\u1ecbnh ngh\u0129a 1\u00a0mi\u1ec1n qu\u1ea3ng b\u00e1 l\u1edbp 2.<\/li>\n<li><strong>VNID \u2013 Virtual Network Identifier:\u00a0<\/strong>VXLAN ID\u00a0g\u1ed3m\u00a024 bit cho ph\u00e9p \u0111\u00e1nh \u0111\u1ecba ch\u1ec9 l\u00ean t\u1edbi 16 tri\u1ec7u m\u1ea1ng logic trong c\u00f9ng m\u1ed9t mi\u1ec1n qu\u1ea3n tr\u1ecb.<\/li>\n<li><strong>Bridge Domain:<\/strong>\u00a0bao g\u1ed3m c\u00e1c c\u1ed5ng v\u1eadt l\u00fd ho\u1eb7c logic c\u00f3 chung mi\u1ec1n qu\u1ea3ng b\u00e1.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/cnttshop.vn\/storage\/Bai-Viet\/Cisco\/VXLAN\/VXLAN-attribute-min.png\" alt=\"c\u00e1c kh\u00e1i ni\u1ec7m trong VXLAN\" \/><\/p>\n<h2>\u01afu \u0111i\u1ec3m c\u1ee7a m\u00f4 h\u00ecnh tri\u1ec3n khai VXLAN<\/h2>\n<ul>\n<li><strong>H\u1ed7 tr\u1ee3 nhi\u1ec1u kh\u00e1ch h\u00e0ng tr\u00ean c\u00f9ng 1 h\u1ec7 th\u1ed1ng:<\/strong>\u00a0VXLAN Fabric h\u1ed7 tr\u1ee3 nhi\u1ec1u kh\u00e1ch h\u00e0ng tr\u00ean c\u1ea3 L\u1edbp 2 (m\u1ed7i VNID \u0111\u1ecbnh danh cho 1 kh\u00e1ch h\u00e0ng kh\u00e1c nhau) v\u00e0 L\u1edbp 3 (s\u1eed d\u1ee5ng VRF kh\u00e1c nhau cho m\u1ed7i kh\u00e1ch h\u00e0ng kh\u00e1c nhau.<\/li>\n<li><strong>T\u00ednh di \u0111\u1ed9ng:<\/strong>\u00a0VXLAN cung c\u1ea5p kh\u1ea3 n\u0103ng tri\u1ec3n khai c\u00e1c m\u1ea1ng Layer 2 overlay tr\u00ean c\u00e1c m\u1ea1ng Layer 3 s\u1eb5n c\u00f3, cung c\u1ea5p t\u00ednh linh ho\u1ea1t v\u00e0 di \u0111\u1ed9ng khi thi\u1ebft k\u1ebf c\u00e1c m\u1ea1ng Layer 2.<\/li>\n<li><strong>T\u0103ng s\u1ed1 l\u01b0\u1ee3ng segments l\u1edbp 2:<\/strong>\u00a0C\u00e1c thi\u1ebft k\u1ebf d\u1ef1a tr\u00ean Vlan b\u1ecb gi\u1edbi h\u1ea1n t\u1ed1i \u0111a 4.096 ph\u00e2n \u0111o\u1ea1n L\u1edbp 2 do s\u1eed d\u1ee5ng Vlan ID 12 bit. VXLAN gi\u1edbi thi\u1ec7u m\u1ed9t VNID 24 bit v\u1ec1 m\u1eb7t l\u00fd thuy\u1ebft h\u1ed7 tr\u1ee3 t\u1edbi 16 tri\u1ec7u segments.<\/li>\n<li><strong>Multi-path Layer 2:<\/strong>\u00a0c\u00e1c m\u1ea1ng l\u1edbp 2 ch\u1ec9 h\u1ed7 tr\u1ee3 1 tuy\u1ebfn \u0111\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng v\u00ec STP s\u1ebd Block c\u00e1c \u0111\u01b0\u1eddng d\u1ef1 ph\u00f2ng \u0111\u1ec3 tr\u00e1nh loop. VXLAN ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean c\u00e1c m\u1ea1ng L\u1edbp 3 cung c\u1ea5p nhi\u1ec1u tuy\u1ebfn \u0111\u01b0\u1eddng t\u1edbi \u0111\u00edch m\u00e0 kh\u00f4ng ph\u1ee5 thu\u1ed9c<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>VXLAN l\u00e0 g\u00ec? Gi\u1edbi thi\u1ec7u t\u1ed5ng quan v\u1ec1 c\u00f4ng ngh\u1ec7 VXLAN Tr\u01b0\u1edbc \u0111\u00e2y, trong c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u th\u01b0\u1eddng [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[29,32,25,16,6],"tags":[],"class_list":["post-1375","post","type-post","status-publish","format-standard","hentry","category-ccie-rs","category-ccnp-switch","category-cisco","category-courses","category-networking"],"_links":{"self":[{"href":"https:\/\/kb.lagonet.vn\/index.php?rest_route=\/wp\/v2\/posts\/1375","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kb.lagonet.vn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kb.lagonet.vn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kb.lagonet.vn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kb.lagonet.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1375"}],"version-history":[{"count":0,"href":"https:\/\/kb.lagonet.vn\/index.php?rest_route=\/wp\/v2\/posts\/1375\/revisions"}],"wp:attachment":[{"href":"https:\/\/kb.lagonet.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1375"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kb.lagonet.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1375"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kb.lagonet.vn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1375"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}