{"id":9324,"date":"2023-06-10T15:35:37","date_gmt":"2023-06-10T12:35:37","guid":{"rendered":"https:\/\/vasexperts.com\/?p=9324"},"modified":"2025-08-11T14:13:42","modified_gmt":"2025-08-11T11:13:42","slug":"how-dhcp-nak-affects-isps-business","status":"publish","type":"post","link":"https:\/\/vasexperts.com\/br\/blog\/bng\/how-dhcp-nak-affects-isps-business\/","title":{"rendered":"Como o DHCP NAK afeta os neg\u00f3cios do ISP"},"content":{"rendered":"<h2>Cen\u00e1rio de autoriza\u00e7\u00e3o DHCP<\/h2>\r\nA autoriza\u00e7\u00e3o DHCP \u00e9 usada no IPoE conectado ao BNG L2. Esse termo pressup\u00f5e a autoriza\u00e7\u00e3o pela mensagem DHCP Discover do assinante. Esse cen\u00e1rio \u00e9 discutido em detalhes em <a href=\"\/blog\/bng\/bng-call-flows\/\" rel=\"noopener noreferrer\">BNG Call Flows<\/a>.\r\n\r\nA troca de DHCP do cliente com o servidor \u00e9 mostrada no diagrama.\r\n\r\n<noscript><img decoding=\"async\" src=\"\/wp-content\/uploads\/2023\/07\/client-server-dhcp.png\" alt=\"Client Server DHCP\" width=\"100%\" height=\"auto\" class=\"alignnone size-full wp-image-9330\" srcset=\"\/wp-content\/uploads\/2023\/07\/client-server-dhcp.png 2048w, \/wp-content\/uploads\/2023\/07\/client-server-dhcp-300x85.png 300w, \/wp-content\/uploads\/2023\/07\/client-server-dhcp-1024x289.png 1024w, \/wp-content\/uploads\/2023\/07\/client-server-dhcp-768x217.png 768w, \/wp-content\/uploads\/2023\/07\/client-server-dhcp-1536x434.png 1536w\" sizes=\"(max-width: 2048px) 100vw, 2048px\"><\/noscript><img decoding=\"async\" src=\"\/wp-content\/uploads\/2023\/07\/client-server-dhcp.png\" alt=\"Client Server DHCP\" width=\"100%\" height=\"auto\" class=\"alignnone size-full wp-image-9330 lazyload\" sizes=\"(max-width: 2048px) 100vw, 2048px\" data-src=\"\/wp-content\/uploads\/2023\/07\/client-server-dhcp.png\" data-srcset=\"\/wp-content\/uploads\/2023\/07\/client-server-dhcp.png 2048w, \/wp-content\/uploads\/2023\/07\/client-server-dhcp-300x85.png 300w, \/wp-content\/uploads\/2023\/07\/client-server-dhcp-1024x289.png 1024w, \/wp-content\/uploads\/2023\/07\/client-server-dhcp-768x217.png 768w, \/wp-content\/uploads\/2023\/07\/client-server-dhcp-1536x434.png 1536w\">\r\n\r\nAp\u00f3s a autoriza\u00e7\u00e3o, o cliente recebe um endere\u00e7o IP para o per\u00edodo de tempo de concess\u00e3o e, depois da metade do tempo, envia uma solicita\u00e7\u00e3o DHCP para estender a concess\u00e3o do endere\u00e7o IP alocado e espera um DHCP ACK.\r\n\r\nMas h\u00e1 um cen\u00e1rio em que o assinante precisa ser reautorizado, e isso \u00e9 feito somente pela mensagem DHCP Discover. \u00c9 nesse caso que o recurso exclusivo do BNG Stingray SG \u00e9 usado: podemos aceitar um CoA Disconnect (PoD \u2013 Packet of Disconnect) do servidor Radius e responder \u00e0 pr\u00f3xima solicita\u00e7\u00e3o do cliente para a renova\u00e7\u00e3o do lease <a href=\"https:\/\/wiki.vasexperts.com\/doku.php?id=dpi:bras_bng:radius_integration:radius_auth_server_integration:radius_auth_coa:start\" rel=\"nofollow noopener noreferrer\">com DHCP NAK (NAK significa Not Acknowledged)<\/a>.\r\n\r\n<noscript><img decoding=\"async\" src=\"\/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius.png\" alt=\"Client BNG PCRF Radius\" width=\"100%\" height=\"auto\" class=\"alignnone size-full wp-image-9329\" srcset=\"\/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius.png 2048w, \/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius-300x117.png 300w, \/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius-1024x400.png 1024w, \/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius-768x300.png 768w, \/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius-1536x600.png 1536w\" sizes=\"(max-width: 2048px) 100vw, 2048px\"><\/noscript><img decoding=\"async\" src=\"\/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius.png\" alt=\"Client BNG PCRF Radius\" width=\"100%\" height=\"auto\" class=\"alignnone size-full wp-image-9329 lazyload\" sizes=\"(max-width: 2048px) 100vw, 2048px\" data-src=\"\/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius.png\" data-srcset=\"\/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius.png 2048w, \/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius-300x117.png 300w, \/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius-1024x400.png 1024w, \/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius-768x300.png 768w, \/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius-1536x600.png 1536w\">\r\n\r\n   <strong>   Onde isso nos leva?    <\/strong>  \r\nO uso do NAK DHCP acelera a reautoriza\u00e7\u00e3o em exatamente 2 vezes e n\u00e3o exige a reinicializa\u00e7\u00e3o do roteador, como, por exemplo, com o Nokia BNG, em que n\u00e3o h\u00e1 como processar solicita\u00e7\u00f5es DHCP ap\u00f3s o recebimento do CoA.\r\n<h2>Como o NAK DHCP afeta o processo comercial de um ISP?<\/h2>\r\n   <strong>   Em primeiro lugar, a resposta NAK acelera a aplica\u00e7\u00e3o das op\u00e7\u00f5es de tarifa    <\/strong>   diretamente no equipamento do cliente. O cliente espera menos, o que significa que sua fidelidade aumenta. A mudan\u00e7a geralmente \u00e9 necess\u00e1ria no momento mais crucial, quando o cliente acabou de pagar pelo servi\u00e7o e precisa urgentemente da Internet.\r\n\r\n   <strong>   Em segundo lugar, o uso de respostas NAK DHCP reduz o custo de conex\u00e3o de novos usu\u00e1rios,    <\/strong>   porque o tempo de um especialista na instala\u00e7\u00e3o \u00e9 caro, e gast\u00e1-lo esperando na linha de suporte t\u00e9cnico significa uma perda para a empresa. O algoritmo padr\u00e3o da conex\u00e3o inicial do cliente pressup\u00f5e que ele entre em um dom\u00ednio com direitos limitados, onde, ap\u00f3s a autentica\u00e7\u00e3o, ele pode reautorizar e entrar na Internet. O Stingray SG reduz o tempo de espera pela metade, o que permitir\u00e1 que um especialista conecte mais assinantes.\r\n\r\nAl\u00e9m disso, n\u00e3o perca o algoritmo quando n\u00e3o interrompemos a sess\u00e3o atual, mas apenas passamos os atributos que foram alterados. Essa op\u00e7\u00e3o \u00e9 chamada de Full CoA ou simplesmente CoA.\r\n<h2>Para que \u00e9 usado o Full CoA?<\/h2>\r\n<noscript><img decoding=\"async\" src=\"\/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius-coa.png\" alt=\"Client BNG PCRF Radius CoA\" width=\"100%\" height=\"auto\" class=\"alignnone size-full wp-image-9328\" srcset=\"\/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius-coa.png 1024w, \/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius-coa-300x88.png 300w, \/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius-coa-768x226.png 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/noscript><img decoding=\"async\" src=\"\/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius-coa.png\" alt=\"Client BNG PCRF Radius CoA\" width=\"100%\" height=\"auto\" class=\"alignnone size-full wp-image-9328 lazyload\" sizes=\"(max-width: 1024px) 100vw, 1024px\" data-src=\"\/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius-coa.png\" data-srcset=\"\/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius-coa.png 1024w, \/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius-coa-300x88.png 300w, \/wp-content\/uploads\/2023\/07\/client-bng-pcrf-radius-coa-768x226.png 768w\">\r\n\r\nEle \u00e9 usado ativamente pelos ISPs quando n\u00e3o \u00e9 necess\u00e1rio alterar o endere\u00e7o IP durante a reautoriza\u00e7\u00e3o. Basta alterar os par\u00e2metros da sess\u00e3o atual. Um exemplo \u00e9 a conex\u00e3o de um servi\u00e7o como o modo \u201cTurbo Button\u201d, que aumenta a velocidade da conex\u00e3o por um determinado intervalo de tempo.\r\n[product id=\u201d 132\u2033 type=\u201ddark\u201d]","protected":false},"excerpt":{"rendered":"<p>Hoje, vamos dar uma olhada em um exemplo de como uma funcionalidade espec\u00edfica do Stingray SG afeta os neg\u00f3cios e economiza os recursos de uma empresa. E quanto mais economia, mais lucro.<\/p>\n","protected":false},"author":7,"featured_media":9327,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[],"class_list":["post-9324","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bng"],"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\/bng\/how-dhcp-nak-affects-isps-business\/\",\"url\":\"https:\/\/vasexperts.com\/blog\/bng\/how-dhcp-nak-affects-isps-business\/\",\"name\":\"[:en]How DHCP NAK 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