{"id":231,"date":"2026-05-02T11:57:45","date_gmt":"2026-05-02T09:57:45","guid":{"rendered":"https:\/\/eryann.fr\/?p=231"},"modified":"2026-05-02T14:09:00","modified_gmt":"2026-05-02T12:09:00","slug":"fiche-configuration-des-vlan-sous-linux","status":"publish","type":"post","link":"https:\/\/eryann.fr\/index.php\/reseau\/fiche-configuration-des-vlan-sous-linux\/","title":{"rendered":"Fiche configuration des VLAN sous linux"},"content":{"rendered":"\n<p><audio autoplay=\"\"><\/audio><\/p>\n\n\n\n<p>Les VLAN permettent de segmenter un r\u00e9seau logique sur une m\u00eame interface physique.<br>Sous Linux, leur configuration d\u00e9pend du gestionnaire r\u00e9seau utilis\u00e9.<\/p>\n\n\n\n<p>Cette fiche permet :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>de configurer les VLAN<\/li>\n\n\n\n<li>de comprendre leur fonctionnement<\/li>\n\n\n\n<li>de savoir quand les utiliser c\u00f4t\u00e9 machine<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"683\" height=\"1024\" src=\"https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/e44fd1db-751d-4933-8191-f9ff4bcca0d0-683x1024.png\" alt=\"\" class=\"wp-image-232\" srcset=\"https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/e44fd1db-751d-4933-8191-f9ff4bcca0d0-683x1024.png 683w, https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/e44fd1db-751d-4933-8191-f9ff4bcca0d0-200x300.png 200w, https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/e44fd1db-751d-4933-8191-f9ff4bcca0d0-768x1152.png 768w, https:\/\/eryann.fr\/wp-content\/uploads\/2026\/05\/e44fd1db-751d-4933-8191-f9ff4bcca0d0.png 1024w\" sizes=\"auto, (max-width: 683px) 100vw, 683px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">1. Principe VLAN<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>Interface physique (eth0)<br>        \u2193<br>Trunk VLAN (802.1Q)<br>        \u2193<br>Interfaces VLAN (eth0.10, eth0.20)<br>        \u2193<br>R\u00e9seaux s\u00e9par\u00e9s<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">2. Pr\u00e9-requis<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo apt install vlan<br>modprobe 8021q<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">3. Configuration selon les gestionnaires<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Debian (\/etc\/network\/interfaces)<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>auto eth0.10<br>iface eth0.10 inet static<br>    address 192.168.10.10<br>    netmask 255.255.255.0<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">systemd-networkd<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code># \/etc\/systemd\/network\/vlan10.netdev<br>&#91;NetDev]<br>Name=eth0.10<br>Kind=vlan<br><br>&#91;VLAN]<br>Id=10<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code># \/etc\/systemd\/network\/vlan10.network<br>&#91;Match]<br>Name=eth0.10<br><br>&#91;Network]<br>Address=192.168.10.10\/24<br>Gateway=192.168.10.1<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">netplan<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>network:<br>  version: 2<br>  renderer: networkd<br><br>  vlans:<br>    vlan10:<br>      id: 10<br>      link: eth0<br>      addresses:<br>        - 192.168.10.10\/24<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">NetworkManager (nmcli)<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>nmcli con add type vlan con-name vlan10 dev eth0 id 10 ip4 192.168.10.10\/24<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">dhcpcd (Raspberry Pi)<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>interface eth0.10<br>static ip_address=192.168.10.10\/24<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Commande temporaire<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ip link add link eth0 name eth0.10 type vlan id 10<br>ip link set eth0.10 up<br>ip addr add 192.168.10.10\/24 dev eth0.10<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">4. V\u00e9rification<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>ip a<br>ip -d link show<br>ping 192.168.10.1<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">5. Quand configurer les VLAN sur la machine<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Cas o\u00f9 c\u2019est n\u00e9cessaire<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Serveur multi-r\u00e9seaux<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>eth0<br> \u251c\u2500\u2500 eth0.10 (utilisateurs)<br> \u251c\u2500\u2500 eth0.20 (admin)<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">VM avec plusieurs r\u00e9seaux<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>VM<br> \u251c\u2500\u2500 eth0.10<br> \u251c\u2500\u2500 eth0.20<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">Firewall \/ routeur Linux<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>segmentation obligatoire<\/li>\n\n\n\n<li>plusieurs zones r\u00e9seau<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">Lab \/ cybers\u00e9curit\u00e9<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>tests VLAN<\/li>\n\n\n\n<li>sniffing<\/li>\n\n\n\n<li>simulation r\u00e9seau<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">6. Cas o\u00f9 il ne faut pas configurer les VLAN<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Poste utilisateur<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>PC \u2192 port access (VLAN d\u00e9j\u00e0 g\u00e9r\u00e9 par le switch)<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">R\u00e9seau simple<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>une machine = un r\u00e9seau<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Switch correctement configur\u00e9<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>port access \u2192 pas de VLAN c\u00f4t\u00e9 OS<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">7. Cas hybride (virtualisation)<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>Switch (trunk)<br>        \u2193<br>Hyperviseur<br>        \u2193<br>VM<\/code><\/pre>\n\n\n\n<p>Deux approches :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>VLAN g\u00e9r\u00e9s par l\u2019hyperviseur<\/li>\n\n\n\n<li>VLAN g\u00e9r\u00e9s dans la VM<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">8. Sch\u00e9ma de fonctionnement<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>Carte r\u00e9seau eth0<br>        \u2193<br>Trunk VLAN (802.1Q)<br>        \u2193<br>Interfaces VLAN (eth0.X)<br>        \u2193<br>Configuration IP<br>        \u2193<br>Acc\u00e8s aux r\u00e9seaux<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">9. Tableau d\u00e9cisionnel<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Situation<\/th><th>VLAN sur machine<\/th><th>VLAN sur switch<\/th><\/tr><\/thead><tbody><tr><td>Poste utilisateur<\/td><td>non<\/td><td>oui<\/td><\/tr><tr><td>Serveur simple<\/td><td>non<\/td><td>oui<\/td><\/tr><tr><td>Serveur multi-r\u00e9seaux<\/td><td>oui<\/td><td>oui<\/td><\/tr><tr><td>VM classique<\/td><td>non<\/td><td>oui<\/td><\/tr><tr><td>VM firewall<\/td><td>oui<\/td><td>oui<\/td><\/tr><tr><td>Lab r\u00e9seau<\/td><td>oui<\/td><td>oui<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">10. Tableau r\u00e9capitulatif technique<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Gestionnaire<\/th><th>Syntaxe VLAN<\/th><th>Complexit\u00e9<\/th><th>Usage<\/th><\/tr><\/thead><tbody><tr><td>interfaces<\/td><td>eth0.10<\/td><td>simple<\/td><td>Debian<\/td><\/tr><tr><td>networkd<\/td><td>netdev + network<\/td><td>moyen<\/td><td>serveur<\/td><\/tr><tr><td>netplan<\/td><td>vlans:<\/td><td>simple<\/td><td>Ubuntu<\/td><\/tr><tr><td>nmcli<\/td><td>type vlan<\/td><td>simple<\/td><td>script<\/td><\/tr><tr><td>dhcpcd<\/td><td>eth0.X<\/td><td>simple<\/td><td>Raspberry<\/td><\/tr><tr><td>ip<\/td><td>temporaire<\/td><td>rapide<\/td><td>test<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">11. Erreurs fr\u00e9quentes<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>port switch non configur\u00e9 en trunk<\/li>\n\n\n\n<li>mauvais ID VLAN<\/li>\n\n\n\n<li>module 8021q absent<\/li>\n\n\n\n<li>interface VLAN non activ\u00e9e<\/li>\n\n\n\n<li>confusion access \/ trunk<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">12. Bonnes pratiques<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>v\u00e9rifier la config du switch<\/li>\n\n\n\n<li>utiliser VLAN uniquement si n\u00e9cessaire<\/li>\n\n\n\n<li>documenter les VLAN<\/li>\n\n\n\n<li>tester avec ip link et ping<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">13. Recap<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>VLAN = segmentation r\u00e9seau<\/li>\n\n\n\n<li>eth0.X = interface VLAN<\/li>\n\n\n\n<li>n\u00e9cessite un port trunk<\/li>\n\n\n\n<li>d\u00e9pend du gestionnaire r\u00e9seau<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>Les VLAN permettent :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>d\u2019isoler les r\u00e9seaux<\/li>\n\n\n\n<li>d\u2019am\u00e9liorer la s\u00e9curit\u00e9<\/li>\n\n\n\n<li>de structurer une infrastructure<\/li>\n<\/ul>\n\n\n\n<p>Mais ils doivent \u00eatre utilis\u00e9s correctement :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>c\u00f4t\u00e9 switch dans la majorit\u00e9 des cas<\/li>\n\n\n\n<li>c\u00f4t\u00e9 machine uniquement si n\u00e9cessaire<\/li>\n<\/ul>\n\n\n\n<p>Comp\u00e9tence essentielle pour BTS CIEL et BTS SIO.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Les VLAN permettent de segmenter un r\u00e9seau logique sur une m\u00eame interface physique.Sous Linux, leur configuration d\u00e9pend du gestionnaire r\u00e9seau utilis\u00e9. Cette fiche permet : 1. Principe VLAN 2. Pr\u00e9-requis 3. Configuration selon les gestionnaires Debian (\/etc\/network\/interfaces) systemd-networkd netplan NetworkManager (nmcli) dhcpcd (Raspberry Pi) Commande temporaire 4. V\u00e9rification 5. Quand configurer les VLAN sur la [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","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":"","ast-disable-related-posts":"","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-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":"","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-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":"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":""},"mobile":{"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":""}},"footnotes":""},"categories":[12,10],"tags":[],"class_list":["post-231","post","type-post","status-publish","format-standard","hentry","category-linux","category-reseau"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fiche configuration des VLAN sous linux - Eryann Breizh SecOps<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/eryann.fr\/index.php\/reseau\/fiche-configuration-des-vlan-sous-linux\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fiche configuration des VLAN sous linux - Eryann Breizh SecOps\" \/>\n<meta property=\"og:description\" content=\"Les VLAN permettent de segmenter un r\u00e9seau logique sur une m\u00eame interface physique.Sous Linux, leur configuration d\u00e9pend du gestionnaire r\u00e9seau utilis\u00e9. 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