{"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\/pt\/knowledge-center\/25gbase-ieee-802-3by-single-lane-25gbe-standard","title":{"rendered":"25GBASE IEEE 802.3by: O Padr\u00e3o Ethernet de 25 Gb de Uma \u00danica Via"},"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\">A explos\u00e3o de servi\u00e7os em nuvem, virtualiza\u00e7\u00e3o, cargas de trabalho de IA e implanta\u00e7\u00f5es de servidores de alta densidade impulsionou os centros de dados a buscar tecnologias Ethernet mais r\u00e1pidas e eficientes. Para preencher a lacuna entre 10 GbE e 40\/100 GbE, cuja implementa\u00e7\u00e3o \u00e9 custosa, o IEEE introduziu <strong>IEEE 802.3by<\/strong>, definindo uma <strong>camada f\u00edsica Ethernet de 25 Gb\/s por \u00fanico canal<\/strong>, comumente conhecido como <strong>25GBASE<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Este artigo explica o que \u00e9 o IEEE 802.3by, por que ele \u00e9 relevante e como permite a implanta\u00e7\u00e3o escal\u00e1vel de Ethernet de 25 Gb\/s \u2014 al\u00e9m de como <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26225-25g-sfp28.htm\">os m\u00f3dulos SFP28 da LINK-PP<\/a> suportam esse ecossistema.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 O que \u00e9 o IEEE 802.3by?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O IEEE 802.3by \u00e9 uma emenda ao padr\u00e3o Ethernet IEEE 802.3 que define as especifica\u00e7\u00f5es para <strong>Ethernet de 25 Gigabits por um \u00fanico canal el\u00e9trico<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ele padroniza a transmiss\u00e3o a 25 Gb\/s em:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>cabos de cobre com conex\u00e3o direta (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/pt\/knowledge-center\/what-is-breakout-dac-and-why-breakout-dac-matters\/\">DAC<\/a>)<\/p><\/li><li><p>canais de backplane<\/p><\/li><li><p>Fibra multimodo<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Objetivo: oferecer um caminho de atualiza\u00e7\u00e3o simples, econ\u00f4mico e de alta densidade de 10G para 25G, especialmente nas conex\u00f5es entre servidores e switches folha (leaf) em centros de dados.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 Por que o 25GBASE foi criado<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >Efici\u00eancia de canal \u00fanico<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Links anteriores de 40GbE usavam <strong>4 \u00d7 10 Gb\/s por canal<\/strong>. Em contraste, o 25GBASE usa <strong>1 \u00d7 25 Gb\/s por canal<\/strong>, oferecendo:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Maior largura de banda por canal<\/p><\/li><li><p>Consumo reduzido de energia<\/p><\/li><li><p>Redu\u00e7\u00e3o do custo por porta<\/p><\/li><li><p>Cablagem e \u00f3ptica mais simplificadas<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >Atualiza\u00e7\u00e3o ideal a partir de 10G<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">25 Gb\/s fornece <strong>2,5\u00d7 a largura de banda de 10 Gb\/s<\/strong> com apenas um pequeno aumento de consumo de energia e custo \u2014 ideal para E\/S de servidores de alta densidade.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Caminho escal\u00e1vel para 50\/100 GbE<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">O 25G constitui o bloco fundamental para:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ethernet de 50G (2 \u00d7 canais de 25G)<\/p><\/li><li><p>Ethernet 100G (<a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/472118.htm\">4 \u00d7 canais de 25G<\/a>)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c9 uma velocidade fundamental nas malhas modernas de centros de dados.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 Principais caracter\u00edsticas t\u00e9cnicas do 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>Recurso<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Descri\u00e7\u00e3o<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"303\"><p>Velocidade de linha<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>25 Gb\/s por canal<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"303\"><p>Codifica\u00e7\u00e3o<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>codifica\u00e7\u00e3o de linha 64b\/66b<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"303\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/pt\/glossary\/fec-forward-error-correction-in-optical-communication\/\">FEC<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>FEC-RS opcional<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"303\"><p>Meio de transmiss\u00e3o<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cobre, backplane, fibra multimodo<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"303\"><p>Formato do m\u00f3dulo<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>SFP28<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"303\"><p>Uso pretendido<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Interconex\u00f5es servidor-switch<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 Variantes de interface 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>Padr\u00e3o<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Meio<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Caso de uso<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>25GBASE-CR \/ CR-S<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cabo DAC de cobre Twinax<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Interconex\u00f5es curtas dentro do rack (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>Placa-m\u00e3e<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Conex\u00f5es de backplane entre servidores e placas de linha<\/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>Fibra multimodo<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>At\u00e9 ~100 m em fibra 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-ER<\/a>*<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Fibra monomodo<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>~10 km (*definido em emendas posteriores)<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 Cen\u00e1rios t\u00edpicos de implanta\u00e7\u00e3o<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >Redes folha-espinha (leaf-spine) em centros de dados<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">O 25GBASE ajuda operadores a dimensionar o tr\u00e1fego leste-oeste (east-west) mantendo sob controle os custos e a pegada da infraestrutura.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Conex\u00f5es servidor\u2013topo-de-rack (ToR)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Servidores com NICs de 25G conectam-se a switches ToR usando \u00f3pticos SFP28 ou cabos DAC.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Agrega\u00e7\u00e3o e <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/pt\/knowledge-center\/what-you-need-to-know-about-edge-computing-key-benefits-uses\/\">Computa\u00e7\u00e3o de Borda<\/a><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Uplinks compat\u00edveis com 25G oferecem o equil\u00edbrio ideal entre throughput e custo, especialmente em arquiteturas de borda (edge) e prontas para IA.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 Boas pr\u00e1ticas para implanta\u00e7\u00e3o do 25GBASE<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >Escolha o meio adequado<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>1\u20135 m:<\/strong> Cobre DAC (25GBASE-CR)<\/p><\/li><li><p><strong>At\u00e9 ~100 m:<\/strong> Fibra multimodo (25GBASE-SR + OM4)<\/p><\/li><li><p><strong>Campus\/alcance longo:<\/strong> Fibra monomodo (25GBASE-LR ou especifica\u00e7\u00f5es posteriores)<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >Valide a interoperabilidade de hardware<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Certifique-se de que switches, NICs e <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26225-25g-sfp28.htm\">m\u00f3dulos \u00f3pticos<\/a> todos estejam em conformidade com o IEEE 802.3by.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Considere os requisitos de FEC<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ative o FEC-RS onde a margem do link ou ambientes com interfer\u00eancia eletromagn\u00e9tica exigirem maior robustez.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 M\u00f3dulos SFP28 e solu\u00e7\u00f5es 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\">O principal fator de forma para 25GBASE \u00e9 <strong>SFP28<\/strong> \u2014 mecanicamente semelhante ao SFP+, mas com especifica\u00e7\u00f5es el\u00e9tricas aprimoradas para sinaliza\u00e7\u00e3o a 25 Gb\/s.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A LINK-PP oferece <strong>M\u00f3dulos \u00f3pticos SFP28 de 25G e cabos DAC alinhados ao IEEE 802.3by<\/strong> para implanta\u00e7\u00f5es de alta densidade em centros de dados:<\/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>Transceptores SFP28 25G LINK-PP<\/strong><\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Principais benef\u00edcios dos m\u00f3dulos 25G da LINK-PP:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Desempenho de link de baixa lat\u00eancia e alta estabilidade<\/p><\/li><li><p>Compatibilidade de n\u00edvel OEM com principais marcas de switches<\/p><\/li><li><p>Confiabilidade comprovada em centros de dados hiperscale e corporativos<\/p><\/li><li><p>Pre\u00e7os competitivos para implanta\u00e7\u00f5es em volume<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 Resumo<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O padr\u00e3o IEEE 802.3by permite <strong>implanta\u00e7\u00e3o eficiente e escal\u00e1vel de 25 GbE por canal \u00fanico<\/strong> \u2014 agora uma tecnologia central em centros de dados modernos. Com cablagem direta, forte retrocompatibilidade com 10G e escalabilidade futura para 50\/100G e 25GBASE, o 25GBASE \u00e9 um passo essencial na evolu\u00e7\u00e3o das redes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para engenheiros e planejadores migrando para 25 GbE, <strong>LINK-PP <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/476046.htm\"><strong>M\u00f3dulos SFP28<\/strong><\/a><strong> and <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26454-dac-aoc-aec-cables.htm\"><strong>solu\u00e7\u00f5es DAC<\/strong><\/a> fornecem conectividade confi\u00e1vel e otimizada em custo, alinhada \u00e0s especifica\u00e7\u00f5es do IEEE 802.3by.<\/p>","protected":false},"excerpt":{"rendered":"<p>Explore o padr\u00e3o IEEE 802.3by para Ethernet 25GBASE. Conhe\u00e7a as especifica\u00e7\u00f5es, tipos de m\u00eddia, cen\u00e1rios de aplica\u00e7\u00e3o e como os m\u00f3dulos SFP28 da LINK-PP suportam redes 25GbE confi\u00e1veis.<\/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\/pt\/wp-json\/wp\/v2\/posts\/4545","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/comments?post=4545"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/posts\/4545\/revisions"}],"predecessor-version":[{"id":10951,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/posts\/4545\/revisions\/10951"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/media\/4544"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/media?parent=4545"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/categories?post=4545"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/tags?post=4545"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}