{"id":10917,"date":"2024-08-08T18:11:30","date_gmt":"2024-08-08T15:11:30","guid":{"rendered":"https:\/\/vasexperts.com\/?p=10917"},"modified":"2025-08-13T14:05:19","modified_gmt":"2025-08-13T11:05:19","slug":"ssg-as-a-border-router-arp-management","status":"publish","type":"post","link":"https:\/\/vasexperts.com\/br\/blog\/functionality\/ssg-as-a-border-router-arp-management\/","title":{"rendered":"SSG como roteador de borda. Gerenciamento de ARP"},"content":{"rendered":"<h2>Roteamento no SSG<\/h2>\r\nO roteamento no SSG \u00e9 realizado pela troca de rotas entre o SSG e o Soft-Router usando a tabela de rotas do kernel do Linux. Voc\u00ea pode saber mais sobre isso em <a rel=\"nofollow\" href=\"https:\/\/wiki.vasexperts.com\/doku.php?id=dpi:dpi_components:router:start\">nossa base de conhecimento<\/a>.\r\n\r\nOs principais recursos do SSG como roteador incluem:\r\n<ul>\r\n \t<li>Suporte para protocolos de roteamento BGP e OSPF.<\/li>\r\n \t<li>Implementa\u00e7\u00e3o VRF Lite em que o SSG compartilha tabelas de roteamento, mas n\u00e3o cria t\u00faneis exclusivos para o tr\u00e1fego de cada VRF (por exemplo, MPLS, VXLAN). O VRF Lite permite o isolamento dos servi\u00e7os fornecidos e a otimiza\u00e7\u00e3o do roteamento ao usar links diferentes.<\/li>\r\n \t<li>Suporte a ECMP (Equal Cost Multi-Path) e LAG (Link Aggregation Group).<\/li>\r\n<\/ul>\r\nCom o lan\u00e7amento da vers\u00e3o 13.1, o SSG pode ser usado como um roteador de borda.\r\n<h2>Otimiza\u00e7\u00e3o de roteamento no SSG com o gerenciador de ARP<\/h2>\r\nVamos considerar um esquema t\u00edpico de constru\u00e7\u00e3o de rede de uma operadora de telecomunica\u00e7\u00f5es, em que o SSG atua como DPI\/NAT\/BRAS\/Roteador de Fronteira. O SSG termina o segmento L2 do assinante para conex\u00f5es IPoE\/PPPPoE no lado das interfaces de entrada. As interfaces de sa\u00edda est\u00e3o inclu\u00eddas no switch ao qual o Uplink e os roteadores internos est\u00e3o conectados.\r\n\r\n   [important]  Como o SSG n\u00e3o alterna internamente entre pares de interfaces f\u00edsicas, as conex\u00f5es com v\u00e1rios roteadores devem ser feitas por meio do switch.   [\/important]  \r\n\r\n<a href=\"\/wp-content\/uploads\/2024\/08\/arp_mng.png\" data-fancybox=\"\"><noscript><img decoding=\"async\" class=\"size-full wp-image-\" title=\"\" src=\"\/wp-content\/uploads\/2024\/08\/arp_mng.png\" alt=\"ARP Management\" width=\"\"><\/noscript><img decoding=\"async\" class=\"size-full wp-image- lazyload\" title=\"\" src=\"\/wp-content\/uploads\/2024\/08\/arp_mng.png\" alt=\"ARP Management\" width=\"\" data-src=\"\/wp-content\/uploads\/2024\/08\/arp_mng.png\"><\/a>\r\n\r\nNesse esquema, o SSG recebe o BGP Full View da operadora upstream (BGP Router) e \u00e9 conectado via OSPF ao roteador (OSPF Router), atr\u00e1s do qual est\u00e3o localizados os servi\u00e7os locais da operadora de telecomunica\u00e7\u00f5es.\r\n\r\n   [important]  \u00c9 importante observar que o SSG armazena a tabela de roteamento na RAM, que pode ser facilmente expandida. Se necess\u00e1rio, ele pode receber e processar v\u00e1rias BGP Full Views. Esse recurso \u00e9 usado ativamente pelos provedores, pois eles n\u00e3o conseguiram implement\u00e1-lo em outros roteadores.   [\/important]  \r\n\r\nUma caracter\u00edstica desse esquema \u00e9 que o roteador BGP n\u00e3o anuncia a si mesmo como o nexthop, mas outros roteadores, como o Roteador 1 ou o Roteador 2. Dessa forma, o provedor upstream implementa a redund\u00e2ncia do canal de uplink e, al\u00e9m disso, centraliza o gerenciamento do an\u00fancio de rotas para o provedor downstream.\r\n\r\nAntes da vers\u00e3o 13.1, o SSG n\u00e3o podia enviar de forma independente uma solicita\u00e7\u00e3o ARP para obter os endere\u00e7os MAC do Roteador 1 e do Roteador 2, o que o impedia de formar um pacote em dire\u00e7\u00e3o ao nexthop. Anteriormente, o SSG preenchia sua tabela ARP analisando as solicita\u00e7\u00f5es ARP do namespace da rede e as respostas a essas solicita\u00e7\u00f5es. No entanto, nesse cen\u00e1rio, a pilha de rede do Linux n\u00e3o gera solicita\u00e7\u00f5es ARP para o Roteador 1 e o Roteador 2, pois n\u00e3o h\u00e1 necessidade. Para resolver esse problema, um gerenciador de ARP foi adicionado ao SSG. Agora, o SSG pode gerar solicita\u00e7\u00f5es ARP para os endere\u00e7os IP necess\u00e1rios. Ao gerar uma solicita\u00e7\u00e3o ARP, SSG usa o endere\u00e7o especificado no par\u00e2metro <span>    <strong>   bras_arp_ip    <\/strong>   <\/span>como o    <strong>   src IP    <\/strong>   .\r\n\r\nVoc\u00ea pode ler mais sobre o gerenciador ARP em <a rel=\"nofollow\" href=\"https:\/\/wiki.vasexperts.com\/doku.php?id=dpi:dpi_components:router:start\">nossa base de conhecimento.<\/a>\r\n<h2>Conclus\u00e3o<\/h2>\r\nContinuaremos trabalhando para aprimorar o gerenciador de ARP. Em um futuro pr\u00f3ximo, planejamos adicionar a capacidade de gerar solicita\u00e7\u00f5es ARP com diferentes endere\u00e7os IP de origem, al\u00e9m do endere\u00e7o especificado no par\u00e2metro    <strong>  bras_arp_ip   <\/strong>  . Isso permitir\u00e1 o estabelecimento de v\u00e1rias sess\u00f5es BGP com diferentes provedores.","protected":false},"excerpt":{"rendered":"<p>Por padr\u00e3o, o SSG funciona como uma ponte L2, mas desde 2017 ele foi desenvolvido como um BRAS\/BNG completo. A funcionalidade de roteamento \u00e9 particularmente importante para um gateway de servi\u00e7o, pois \u00e9 necess\u00e1rio que ele se comunique com redes externas, forne\u00e7a acesso a recursos internos e melhore a resili\u00eancia. A equipe de especialistas em VAS ofereceu a oportunidade de incorporar solu\u00e7\u00f5es comprovadas na fun\u00e7\u00e3o de Soft-Router, como BIRD, FRRouting e QUAGGA no SSG.<\/p>\n","protected":false},"author":24,"featured_media":10920,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[55],"tags":[],"class_list":["post-10917","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-functionality"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>(English) VASExperts<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/vasexperts.com\/blog\/functionality\/ssg-as-a-border-router-arp-management\/\",\"url\":\"https:\/\/vasexperts.com\/blog\/functionality\/ssg-as-a-border-router-arp-management\/\",\"name\":\"[:en]SSG as a Border Router. 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