{"id":4545,"date":"2025-10-31T11:12:00","date_gmt":"2025-10-31T11:12:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/25gbase-ieee-802-3by-single-lane-25gbe-standard\/"},"modified":"2026-06-22T05:43:36","modified_gmt":"2026-06-22T05:43:36","slug":"25gbase-ieee-802-3by-single-lane-25gbe-standard","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/fr\/knowledge-center\/25gbase-ieee-802-3by-single-lane-25gbe-standard","title":{"rendered":"25GBASE IEEE 802.3by : la norme Ethernet 25 Gb \u00e0 voie unique"},"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\/ca1377e01de94208976debf546751df0.webp\" alt=\"What Is IEEE 802.3by?\" class=\"wp-image-4542\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ca1377e01de94208976debf546751df0.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ca1377e01de94208976debf546751df0-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ca1377e01de94208976debf546751df0-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ca1377e01de94208976debf546751df0-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ca1377e01de94208976debf546751df0-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019explosion des services cloud, de la virtualisation, des charges de travail d\u2019intelligence artificielle et des d\u00e9ploiements de serveurs haute densit\u00e9 a pouss\u00e9 les centres de donn\u00e9es \u00e0 rechercher des technologies Ethernet plus rapides et plus efficaces. Pour combler le foss\u00e9 entre le 10 GbE et le 40\/100 GbE, co\u00fbteux, l\u2019IEEE a introduit <strong>IEEE 802.3by<\/strong>, d\u00e9finissant une <strong>couche physique Ethernet \u00e0 voie unique de 25 Gb\/s<\/strong>, couramment d\u00e9sign\u00e9e sous le nom de <strong>25GBASE<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cet article explique ce qu\u2019est l\u2019IEEE 802.3by, pourquoi elle est essentielle et comment elle permet un d\u00e9ploiement \u00e9volutif du 25 GbE \u2014 ainsi que la mani\u00e8re dont <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26225-25g-sfp28.htm\">les modules SFP28 de LINK-PP<\/a> soutiennent cet \u00e9cosyst\u00e8me.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 Qu\u2019est-ce que l\u2019IEEE 802.3by ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019IEEE 802.3by est un amendement \u00e0 la norme Ethernet IEEE 802.3 qui d\u00e9finit les sp\u00e9cifications pour <strong>le 25 Gigabit Ethernet sur une seule voie \u00e9lectrique<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Elle normalise la transmission \u00e0 25 Gb\/s sur :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>c\u00e2bles en cuivre directement raccord\u00e9s (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/fr\/knowledge-center\/what-is-breakout-dac-and-why-breakout-dac-matters\/\">DAC<\/a>)<\/p><\/li><li><p>canaux de plan arri\u00e8re<\/p><\/li><li><p>Fibre multimode<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Objectif : offrir un chemin de mise \u00e0 niveau simple, \u00e9conomique et haute densit\u00e9 du 10G vers le 25G, notamment pour les connexions serveur\u2013commutateur feuille dans les centres de donn\u00e9es.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 Pourquoi le 25GBASE a-t-il \u00e9t\u00e9 cr\u00e9\u00e9 ?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >Efficacit\u00e9 \u00e0 voie unique<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Les liaisons 40GbE ant\u00e9rieures utilisaient <strong>4 voies de 10 Gb\/s<\/strong>. En revanche, le 25GBASE utilise <strong>1 voie de 25 Gb\/s<\/strong>, offrant :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Une bande passante plus \u00e9lev\u00e9e par voie<\/p><\/li><li><p>Une consommation \u00e9lectrique r\u00e9duite<\/p><\/li><li><p>Un co\u00fbt r\u00e9duit par port<\/p><\/li><li><p>Un c\u00e2blage et des optiques simplifi\u00e9s<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\u00c9volution id\u00e9ale depuis le 10G<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Le d\u00e9bit de 25 Gb\/s fournit <strong>2,5 fois la bande passante du 10 Gb\/s<\/strong> avec seulement une l\u00e9g\u00e8re augmentation de la consommation d\u2019\u00e9nergie et du co\u00fbt \u2014 id\u00e9al pour les entr\u00e9es-sorties serveur haute densit\u00e9.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Chemin \u00e9volutif vers le 50\/100 GbE<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Le 25G constitue le bloc de construction pour :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>l\u2019Ethernet 50G (2 voies de 25G)<\/p><\/li><li><p>100G Ethernet (<a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/472118.htm\">4 voies de 25G<\/a>)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Il s\u2019agit d\u2019une vitesse fondamentale dans les tissus modernes de centres de donn\u00e9es.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 Caract\u00e9ristiques techniques cl\u00e9s du 25GBASE (IEEE 802.3by)<\/h2>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 303px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"303\"><p>Fonctionnalit\u00e9<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Description<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"303\"><p>D\u00e9bit binaire<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>25 Gb\/s par voie<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"303\"><p>Codage<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>64b\/66b<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"303\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/fr\/glossary\/fec-forward-error-correction-in-optical-communication\/\">FEC<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>FEC RS en option<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"303\"><p>Support physique<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cuivre, plan arri\u00e8re, fibre multimode<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"303\"><p>Format du module<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>SFP28<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"303\"><p>Utilisation cible<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Interconnexions serveur-commutateur<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 Variantes d\u2019interface 25GBASE<\/h2>\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>Norme<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Support<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Cas d\u2019utilisation<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>25GBASE-CR \/ CR-S<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e2ble DAC en cuivre twinax<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Interconnexions intra-rack \u00e0 courte port\u00e9e (1\u20135 m)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>25GBASE-KR \/ KR-S<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Plan arri\u00e8re<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Liaisons plan arri\u00e8re serveur\/carte ligne<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/476099.htm\">25GBASE-SR<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Fibre multimode<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Jusqu\u2019\u00e0 environ 100 m sur fibre OM4<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/476046.htm\">25GBASE-LR<\/a>*<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Fibre monomode<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Environ 10 km (*d\u00e9fini dans des amendements ult\u00e9rieurs)<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 Sc\u00e9narios de d\u00e9ploiement typiques<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >R\u00e9seaux feuille-\u00e9pine de centre de donn\u00e9es<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Le 25GBASE aide les op\u00e9rateurs \u00e0 faire \u00e9voluer le trafic est-ouest tout en ma\u00eetrisant les co\u00fbts et l\u2019empreinte physique de l\u2019infrastructure.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Liaisons serveur\u2013commutateur en t\u00eate de rack (ToR)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Les serveurs \u00e9quip\u00e9s de cartes r\u00e9seau 25G se connectent aux commutateurs ToR \u00e0 l\u2019aide d\u2019optiques SFP28 ou de c\u00e2bles DAC.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Agr\u00e9gation et <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/fr\/knowledge-center\/what-you-need-to-know-about-edge-computing-key-benefits-uses\/\">Informatique en p\u00e9riph\u00e9rie (edge computing)<\/a><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Les liaisons montantes compatibles 25G offrent un \u00e9quilibre optimal entre d\u00e9bit et co\u00fbt, notamment dans les architectures p\u00e9riph\u00e9riques et pr\u00eates pour l\u2019IA.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 Bonnes pratiques pour le d\u00e9ploiement du 25GBASE<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >Choisir le support physique adapt\u00e9<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>1\u20135 m :<\/strong> Cuivre DAC (25GBASE-CR)<\/p><\/li><li><p><strong>Jusqu\u2019\u00e0 environ 100 m :<\/strong> Fibre multimode (25GBASE-SR + OM4)<\/p><\/li><li><p><strong>Campus\/port\u00e9e longue :<\/strong> Fibre monomode (25GBASE-LR ou sp\u00e9cifications ult\u00e9rieures)<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >Valider l\u2019interop\u00e9rabilit\u00e9 mat\u00e9rielle<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Veiller \u00e0 ce que les commutateurs, les cartes r\u00e9seau et <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26225-25g-sfp28.htm\">des modules optiques<\/a> soient tous conformes \u00e0 l\u2019IEEE 802.3by.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Prendre en compte les exigences en mati\u00e8re de FEC<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Activer la FEC RS l\u00e0 o\u00f9 la marge de liaison ou les environnements CEM exigent une robustesse accrue.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 Modules SFP28 et solutions LINK-PP<\/h2>\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\/dbd37648365f4364bc8c6a1ec2ef4a77.webp\" alt=\"LINK-PP SFP28 Modules\" class=\"wp-image-4543\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/dbd37648365f4364bc8c6a1ec2ef4a77.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/dbd37648365f4364bc8c6a1ec2ef4a77-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/dbd37648365f4364bc8c6a1ec2ef4a77-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/dbd37648365f4364bc8c6a1ec2ef4a77-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/dbd37648365f4364bc8c6a1ec2ef4a77-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Le format principal pour le 25GBASE est le <strong>SFP28<\/strong> \u2014 m\u00e9caniquement similaire au SFP+, mais dot\u00e9 de sp\u00e9cifications \u00e9lectriques am\u00e9lior\u00e9es pour le signal \u00e0 25 Gb\/s.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">LINK-PP propose <strong>des modules optiques SFP28 25G et des c\u00e2bles DAC conformes \u00e0 l\u2019IEEE 802.3by<\/strong> pour les d\u00e9ploiements haute densit\u00e9 dans les centres de donn\u00e9es :<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udd17<a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26225-25g-sfp28.htm\"><strong>Transcepteurs SFP28 25G LINK-PP<\/strong><\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Principaux avantages des modules 25G LINK-PP :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Performances de liaison \u00e0 faible latence et haute stabilit\u00e9<\/p><\/li><li><p>Compatibilit\u00e9 de niveau OEM avec les principales marques de commutateurs<\/p><\/li><li><p>Fiabilit\u00e9 \u00e9prouv\u00e9e dans les centres de donn\u00e9es hyperscale et d\u2019entreprise<\/p><\/li><li><p>Tarification comp\u00e9titive pour les d\u00e9ploiements en volume<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 R\u00e9sum\u00e9<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La norme IEEE 802.3by permet un <strong>d\u00e9ploiement efficace et \u00e9volutif du 25 GbE \u00e0 voie unique<\/strong> \u2014 d\u00e9sormais une technologie centrale dans les centres de donn\u00e9es modernes. Avec un c\u00e2blage simple, une forte r\u00e9trocompatibilit\u00e9 avec le 10G et une \u00e9volutivit\u00e9 ascendante vers le 50\/100G et le 25GBASE, le 25GBASE constitue une \u00e9tape essentielle dans l\u2019\u00e9volution des r\u00e9seaux.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour les ing\u00e9nieurs et les planificateurs passant au 25 GbE, <strong>LIEN-PP <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/476046.htm\"><strong>les modules SFP28<\/strong><\/a><strong> and <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26454-dac-aoc-aec-cables.htm\"><strong>les solutions DAC<\/strong><\/a> offrent une connectivit\u00e9 fiable et optimis\u00e9e sur le plan des co\u00fbts, conforme aux sp\u00e9cifications de l\u2019IEEE 802.3by.<\/p>","protected":false},"excerpt":{"rendered":"<p>Explorez la norme IEEE 802.3by pour l\u2019Ethernet 25GBASE. D\u00e9couvrez ses sp\u00e9cifications, ses types de supports, ses sc\u00e9narios d\u2019application, ainsi que la mani\u00e8re dont les modules SFP28 LINK-PP prennent en charge des r\u00e9seaux 25GbE fiables.<\/p>","protected":false},"author":1,"featured_media":4544,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[16,26],"class_list":["post-4545","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-link-pp-25g-sfp28-optical-modules","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/posts\/4545","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/comments?post=4545"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/posts\/4545\/revisions"}],"predecessor-version":[{"id":10951,"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/posts\/4545\/revisions\/10951"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/media\/4544"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/media?parent=4545"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/categories?post=4545"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/fr\/wp-json\/wp\/v2\/tags?post=4545"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}