{"id":57288,"date":"2026-03-04T15:26:09","date_gmt":"2026-03-04T20:26:09","guid":{"rendered":"https:\/\/www.gtt.net\/?page_id=57288"},"modified":"2026-07-07T11:24:39","modified_gmt":"2026-07-07T15:24:39","slug":"bgp-communities","status":"publish","type":"page","link":"https:\/\/www.gtt.net\/services\/managed-networking\/internet\/ip-transit\/bgp-communities\/","title":{"rendered":"BGP Communities"},"content":{"rendered":"\n<div class=\"wp-block-cover alignfull has-white-color has-text-color has-link-color wp-elements-3de8983d4eb00491cdc6bf5881a821cd\" style=\"padding-top:0;padding-bottom:var(--wp--preset--spacing--80)\"><img loading=\"lazy\" decoding=\"async\" width=\"2048\" height=\"430\" class=\"wp-block-cover__image-background wp-image-23723 size-full\" alt=\"\" src=\"https:\/\/www.gtt.net\/wp-content\/uploads\/2023\/04\/final_wan_2048x430px_144ppi.webp\" data-object-fit=\"cover\" srcset=\"https:\/\/www.gtt.net\/wp-content\/uploads\/2023\/04\/final_wan_2048x430px_144ppi.webp 2048w, https:\/\/www.gtt.net\/wp-content\/uploads\/2023\/04\/final_wan_2048x430px_144ppi.webp?resize=600,126 600w, https:\/\/www.gtt.net\/wp-content\/uploads\/2023\/04\/final_wan_2048x430px_144ppi.webp?resize=768,161 768w, https:\/\/www.gtt.net\/wp-content\/uploads\/2023\/04\/final_wan_2048x430px_144ppi.webp?resize=1024,215 1024w, https:\/\/www.gtt.net\/wp-content\/uploads\/2023\/04\/final_wan_2048x430px_144ppi.webp?resize=1536,323 1536w\" sizes=\"auto, (max-width: 2048px) 100vw, 2048px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-black-background-color has-background-dim-70 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container has-global-padding is-layout-constrained wp-container-core-cover-is-layout-13b16a16 wp-block-cover-is-layout-constrained\"><div class=\"wp-block-gtt-breadcrumbs\">\n\t<nav aria-label='breadcrumbs' class='rank-math-breadcrumb'><ul><li><span class=\"last\">Home<\/span><\/li><\/ul><\/nav><\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-container-core-group-is-layout-9132aa3e wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group is-layout-flow wp-container-core-group-is-layout-a2fc1293 wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group is-layout-flow wp-container-core-group-is-layout-26ef70db wp-block-group-is-layout-flow\">\n<h1 class=\"wp-block-heading has-4-x-large-font-size\" style=\"line-height:0.9\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-emerald-color\">BGP Communities<\/mark><\/h1>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group is-layout-grid wp-container-core-group-is-layout-5ce33934 wp-block-group-is-layout-grid\">\n<div class=\"wp-block-query is-layout-flow wp-block-query-is-layout-flow\"><ul class=\"wp-block-post-template is-layout-flow wp-block-post-template-is-layout-flow\"><li class=\"wp-block-post post-60615 post type-post status-publish format-standard has-post-thumbnail hentry category-uncategorized\">\n\n<div class=\"wp-block-group is-vertical is-content-justification-stretch is-layout-flex wp-container-core-group-is-layout-32e4913b wp-block-group-is-layout-flex\"><h2 style=\"line-height:1.2;\" class=\"wp-block-post-title has-large-font-size\">10 Things Every Manufacturer Should Know About Real-Time Networks in 2026<\/h2>\n\n<a style=\"line-height:1.5;\" class=\"wp-block-read-more has-x-small-font-size\" href=\"https:\/\/www.gtt.net\/resources\/blog\/10-things-every-manufacturer-should-know-about-real-time-networks-in-2026\/\" target=\"_self\">Read post<span class=\"screen-reader-text\">: 10 Things Every Manufacturer Should Know About Real-Time Networks in 2026<\/span><\/a><\/div>\n\n<\/li><\/ul>\n\n<\/div>\n\n\n\n<div class=\"wp-block-query is-layout-flow wp-block-query-is-layout-flow\"><ul class=\"wp-block-post-template is-layout-flow wp-block-post-template-is-layout-flow\"><li class=\"wp-block-post post-53320 guides type-guides status-publish has-post-thumbnail hentry\">\n\n<div class=\"wp-block-group is-vertical is-content-justification-stretch is-layout-flex wp-container-core-group-is-layout-32e4913b wp-block-group-is-layout-flex\"><h2 style=\"line-height:1.2;\" class=\"wp-block-post-title has-large-font-size\">From Plan to Protection: 7 Steps to Deploying ZTNA<\/h2>\n\n<a style=\"line-height:1.5;\" class=\"wp-block-read-more has-x-small-font-size\" href=\"https:\/\/www.gtt.net\/resources\/guides\/7-steps-to-deploying-ztna\/\" target=\"_self\">Read guide<span class=\"screen-reader-text\">: From Plan to Protection: 7 Steps to Deploying ZTNA<\/span><\/a><\/div>\n\n<\/li><\/ul>\n\n<\/div>\n\n\n\n<div class=\"wp-block-query is-layout-flow wp-block-query-is-layout-flow\"><ul class=\"wp-block-post-template is-layout-flow wp-block-post-template-is-layout-flow\"><li class=\"wp-block-post post-34886 white-papers type-white-papers status-publish has-post-thumbnail hentry category-whitepaper service-type-managed-services service-type-security industry-type-financial-services industry-type-food-beverage industry-type-healthcare industry-type-manufacturing industry-type-media-broadcast industry-type-professional-services industry-type-retail industry-type-transportation\">\n\n<div class=\"wp-block-group is-vertical is-content-justification-stretch is-layout-flex wp-container-core-group-is-layout-32e4913b wp-block-group-is-layout-flex\"><h2 style=\"line-height:1.2;\" class=\"wp-block-post-title has-large-font-size\">GTT &#038; Corero | Solution Guide \u2013 Choosing the Right DDoS Service<\/h2>\n\n<a style=\"line-height:1.5;\" class=\"wp-block-read-more has-x-small-font-size\" href=\"https:\/\/www.gtt.net\/resources\/white-papers\/solutions-guide-choosing-the-right-ddos-service\/\" target=\"_self\">Read white paper<span class=\"screen-reader-text\">: GTT &#038; Corero | Solution Guide \u2013 Choosing the Right DDoS Service<\/span><\/a><\/div>\n\n<\/li><\/ul>\n\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group alignfull has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group alignwide is-layout-grid wp-container-core-group-is-layout-63c0281d wp-block-group-is-layout-grid\" style=\"padding-top:var(--wp--preset--spacing--80);padding-bottom:var(--wp--preset--spacing--80)\">\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group has-border-color has-emerald-border-color has-emerald-trn-background-color has-background wp-container-content-e44c5f69 is-vertical is-nowrap is-layout-flex wp-container-core-group-is-layout-64435e26 wp-block-group-is-layout-flex\" style=\"border-width:1px;border-radius:8px;min-height:100%;padding-top:var(--wp--preset--spacing--16);padding-right:var(--wp--preset--spacing--16);padding-bottom:var(--wp--preset--spacing--16);padding-left:var(--wp--preset--spacing--16);box-shadow:var(--wp--preset--shadow--small-dark)\">\n<div class=\"wp-block-group is-vertical is-content-justification-left is-layout-flex wp-container-core-group-is-layout-b4a7cec3 wp-block-group-is-layout-flex\">\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-6969d8c5 wp-block-group-is-layout-flex\">\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"has-large-font-size\" style=\"font-style:normal;font-weight:700;line-height:1.2\">Jump to:<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<p><a href=\"#intro\" data-type=\"internal\" data-id=\"#intro\">1. Introduction<\/a><\/p>\n\n\n\n<p><a href=\"#egress\" data-type=\"internal\" data-id=\"#egress\">2. Egress communities<\/a><\/p>\n\n\n\n<p><a href=\"#ingress\">3. Ingress communities<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignfull wp-container-content-3946f5a1 has-global-padding is-layout-constrained wp-container-core-group-is-layout-77c4b500 wp-block-group-is-layout-constrained\">\n<div id=\"intro\" class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-8cad9bce wp-block-group-is-layout-flex\">\n<h2 class=\"wp-block-heading has-3-x-large-font-size\">1. Introduction<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>This document describes the BGP communities which are used by GTT (AS3257).<\/li>\n\n\n\n<li>These communities can be used for their pure informational value and\/or to modify the behavior of the routing service provided by AS3257.<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div id=\"egress\" class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-842ffed4 wp-block-group-is-layout-flex\">\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<h2 class=\"wp-block-heading has-3-x-large-font-size\">2. <strong>Egress communities<\/strong><\/h2>\n\n\n\n<p>These are communities which are relayed from AS3257 to their peers.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignfull is-vertical is-layout-flex wp-container-core-group-is-layout-842ffed4 wp-block-group-is-layout-flex\">\n<h2 class=\"wp-block-heading has-2-x-large-font-size\">2.1 Origin communities\u200b<\/h2>\n\n\n\n<div class=\"wp-block-group alignfull is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<h2 class=\"wp-block-heading has-x-large-font-size\">2.1.1 General<\/h2>\n\n\n\n<div class=\"wp-block-group alignfull has-global-padding is-layout-constrained wp-container-core-group-is-layout-f36bc466 wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-table is-style-default\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Value<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:4000<\/td><td class=\"has-text-align-left\" data-align=\"left\">tags a GTT customer route.<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:5000<\/td><td class=\"has-text-align-left\" data-align=\"left\">a GTT originated route.<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignfull is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<h2 class=\"wp-block-heading has-x-large-font-size\">2.1.1.1 Accounting<\/h2>\n\n\n\n<div class=\"wp-block-group alignfull has-global-padding is-layout-constrained wp-container-core-group-is-layout-f36bc466 wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-table is-style-default\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Value<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:6001<\/td><td class=\"has-text-align-left\" data-align=\"left\">temporary dbb class 1 (allocation policy to be defined)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:6002<\/td><td class=\"has-text-align-left\" data-align=\"left\">temporary dbb class 2 (allocation policy to be defined)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:6003<\/td><td class=\"has-text-align-left\" data-align=\"left\">temporary dbb class 3 (allocation policy to be defined)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:6004<\/td><td class=\"has-text-align-left\" data-align=\"left\">temporary dbb class 4 (allocation policy to be defined)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:6005<\/td><td class=\"has-text-align-left\" data-align=\"left\">temporary dbb class 5 (allocation policy to be defined)<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignfull is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<h2 class=\"wp-block-heading has-x-large-font-size\">2.1.2 Exchanges<\/h2>\n\n\n\n<div class=\"wp-block-group alignfull has-global-padding is-layout-constrained wp-container-core-group-is-layout-f36bc466 wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-table is-style-default\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Value<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:4400-4499<\/td><td class=\"has-text-align-left\" data-align=\"left\">tags EU exchange points (details upon request).<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:4500-4599<\/td><td class=\"has-text-align-left\" data-align=\"left\">tags US exchange points (details upon request).<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignfull is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<h2 class=\"wp-block-heading has-x-large-font-size\">2.1.3 Geographical<\/h2>\n\n\n\n<div class=\"wp-block-group alignfull has-global-padding is-layout-constrained wp-container-core-group-is-layout-f36bc466 wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-table is-style-default\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Value<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:50001<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in Europe<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:50002<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in the US and Canada<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:50003<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in Asia<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:50100<\/td><td class=\"has-text-align-left\" data-align=\"left\">regions by route miles<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:50110<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in central Europe<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:50111<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in outer Europe<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:50120<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in US east coast<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:50121<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in US west coast<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:50122<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in US Canada outer regions<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:50130<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in Asia<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51100<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in the US east coast<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51101<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in NYC<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51102<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in WAS<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51103<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in MIA<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51104<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in ATL<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51105<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in BOS<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51106<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in PHI<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51107<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in CHA<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51108<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in ORL<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51200<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in the US west coast<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51201<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in SJC<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51202<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in LAX<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51203<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in PAO<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51204<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in SEA<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51205<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in PHX<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51206<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in LAS<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51207<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in SLC<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51300<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in the US central<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51301<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in CHI<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51302<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in DAL<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51303<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in DEN<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51304<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in STL<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51305<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in MIN<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51306<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in IAH<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51400<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in Canada<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51401<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in TOR<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51402<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in MTL<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:51403<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in VAN<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53000<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in GR<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53001<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in ATH<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53100<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in NL<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53101<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in AMS<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53200<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in BE<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53201<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in BRU<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53202<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in ANR<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53300<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in FR<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53301<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in PAR<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53302<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in MRS<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53400<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in ES<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53401<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in MAD<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53402<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in BCN<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53520<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in LU<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53530<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in IE<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53531<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in DUB<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53590<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in BG<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53591<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in SOF<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53700<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in LT<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53701<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in VIL<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53900<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in IT<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53901<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in TRN<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53902<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in MIL<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53903<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in BLQ<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53904<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in ROM<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53905<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in CAG<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53906<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in PSR<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53907<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in FLR<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53908<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in GOA<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53909<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in NAP<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53910<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in PMO<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:53911<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in QPA<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54000<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in RO<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54001<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in BUC<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54100<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in CH<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54101<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in ZUR<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54102<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in BSL<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54200<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in CZ<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54201<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in PRG<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54210<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in SK<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54211<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in BTS<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54300<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in AT<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54301<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in VIE<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54400<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in UK<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54401<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in LON<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54402<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in MAN<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54500<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in DK<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54501<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in CPH<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54600<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in SE<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54601<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in STK<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54700<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in NO<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54701<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in OSL<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54800<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in PL<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54801<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in WAW<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54900<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in DE<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54901<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in FRA<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54902<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in DUS<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54903<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in HAM<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54904<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in MUC<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:54905<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in BER<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:56500<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in SG<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:56501<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in SIN<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:56600<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in JP<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:56601<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in TYO<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:58520<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in HK (Hong Kong)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:58521<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in HKG<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:59000<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in TR<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:59001<\/td><td class=\"has-text-align-left\" data-align=\"left\">route originated in IST<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:50999<\/td><td class=\"has-text-align-left\" data-align=\"left\">multi-national prefix (not applicable, legacy)<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignfull is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<h2 class=\"wp-block-heading has-x-large-font-size\">2.1.4 Private interconnect<\/h2>\n\n\n\n<div class=\"wp-block-group alignfull has-global-padding is-layout-constrained wp-container-core-group-is-layout-f36bc466 wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-table is-style-default\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Value<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:30000-39999<\/td><td class=\"has-text-align-left\" data-align=\"left\">auto-incremental number of private interconnects<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignfull is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<h2 class=\"wp-block-heading has-x-large-font-size\">2.1.5 Loopbacks<\/h2>\n\n\n\n<p>Last digits of the loopback IP address from the router receiving the prefix.<\/p>\n\n\n\n<div class=\"wp-block-group alignfull has-global-padding is-layout-constrained wp-container-core-group-is-layout-f36bc466 wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-table is-style-default\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Value<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:8000-8999<\/td><td class=\"has-text-align-left\" data-align=\"left\">loopback IP address<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div id=\"ingress\" class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-8cad9bce wp-block-group-is-layout-flex\">\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<h2 class=\"wp-block-heading has-3-x-large-font-size\">3. Ingress communities<\/h2>\n\n\n\n<p>Communities which are relayed from the peers to AS3257. Prior to activation of community announcement, it is needed to send an email to <a href=\"mailto:noc@gtt.net\">noc@gtt.net<\/a> describing the specific bgp session(s) and intended communities to ensure proper activation on the GTT equipment.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignfull is-vertical is-layout-flex wp-container-core-group-is-layout-842ffed4 wp-block-group-is-layout-flex\">\n<div class=\"wp-block-group alignfull is-vertical is-layout-flex wp-container-core-group-is-layout-842ffed4 wp-block-group-is-layout-flex\">\n<h2 class=\"wp-block-heading has-2-x-large-font-size\">3.1 Restricted route propagation<\/h2>\n\n\n\n<div class=\"wp-block-group alignfull is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<h2 class=\"wp-block-heading has-x-large-font-size\">3.1.1 Well-known communities<\/h2>\n\n\n\n<p>AS3257 supports the use of well-known communities as defined in IETF RFC1997 and RFC3765.<\/p>\n\n\n\n<div class=\"wp-block-group alignfull has-global-padding is-layout-constrained wp-container-core-group-is-layout-f36bc466 wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-table is-style-default\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Value<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">65535:65281<\/td><td class=\"has-text-align-left\" data-align=\"left\">NO_EXPORT (RFC1997)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">65535:65282<\/td><td class=\"has-text-align-left\" data-align=\"left\">NO_ADVERTISE (RFC1997)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">65535:65283<\/td><td class=\"has-text-align-left\" data-align=\"left\">NO_EXPORT_SUBCONFED (RFC1997)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">65535:65284<\/td><td class=\"has-text-align-left\" data-align=\"left\">NOPEER (RFC3765)<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignfull is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<h2 class=\"wp-block-heading has-x-large-font-size\">3.1.2 Do not announce<\/h2>\n\n\n\n<p>The below communities can be used to deny announcements to GTT\u2019s peering partners only. They will not work for GTT\u2019s customers.<\/p>\n\n\n\n<div class=\"wp-block-group alignfull has-global-padding is-layout-constrained wp-container-core-group-is-layout-f36bc466 wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-table is-style-default\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Value<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:2590<\/td><td class=\"has-text-align-left\" data-align=\"left\">do not announce in Asia (only applies to Asia regional peers).<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:2990<\/td><td class=\"has-text-align-left\" data-align=\"left\">do not announce in the US (only applies to US regional peers).<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:2998<\/td><td class=\"has-text-align-left\" data-align=\"left\">do not announce to any peer (legacy)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">65000:XXXX<\/td><td class=\"has-text-align-left\" data-align=\"left\">do not announce to ASXXXX<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">65010:XXXX<\/td><td class=\"has-text-align-left\" data-align=\"left\">do not announce except to ASXXXX<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">65535:65284<\/td><td class=\"has-text-align-left\" data-align=\"left\">do not announce to any peer<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading has-2-x-large-font-size\">3.2 Attribute change<\/h2>\n\n\n\n<div class=\"wp-block-group alignfull is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<h2 class=\"wp-block-heading has-x-large-font-size\">3.2.1 Prepends<\/h2>\n\n\n\n<p>The below communities can be used to prepend announcements to GTT\u2019s peering partners only. They will not work for GTT\u2019s customers.<\/p>\n\n\n\n<div class=\"wp-block-group alignfull has-global-padding is-layout-constrained wp-container-core-group-is-layout-f36bc466 wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-table is-style-default\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Value<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:2291<\/td><td class=\"has-text-align-left\" data-align=\"left\">prepend 1x to any peering partner<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:2292<\/td><td class=\"has-text-align-left\" data-align=\"left\">prepend 2x to any peering partner<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:2293<\/td><td class=\"has-text-align-left\" data-align=\"left\">prepend 3x to any peering partner<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:2491<\/td><td class=\"has-text-align-left\" data-align=\"left\">prepend 1x in Europe (only applies to EU regional peers).<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:2492<\/td><td class=\"has-text-align-left\" data-align=\"left\">prepend 2x in Europe (only applies to EU regional peers).<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:2493<\/td><td class=\"has-text-align-left\" data-align=\"left\">prepend 3x in Europe (only applies to EU regional peers).<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:2591<\/td><td class=\"has-text-align-left\" data-align=\"left\">prepend 1x in Asia (only applies to Asia regional peers).<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:2592<\/td><td class=\"has-text-align-left\" data-align=\"left\">prepend 2x in Asia (only applies to Asia regional peers).<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:2593<\/td><td class=\"has-text-align-left\" data-align=\"left\">prepend 3x in Asia (only applies to Asia regional peers).<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:2991<\/td><td class=\"has-text-align-left\" data-align=\"left\">prepend 1x in the US (only applies to US regional peers).<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:2992<\/td><td class=\"has-text-align-left\" data-align=\"left\">prepend 2x in the US (only applies to US regional peers).<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:2993<\/td><td class=\"has-text-align-left\" data-align=\"left\">prepend 3x in the US (only applies to US regional peers).<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">65001:XXXX<\/td><td class=\"has-text-align-left\" data-align=\"left\">prepend 1x to ASXXXX<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">65002:XXXX<\/td><td class=\"has-text-align-left\" data-align=\"left\">prepend 2x to ASXXXX<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">65003:XXXX<\/td><td class=\"has-text-align-left\" data-align=\"left\">prepend 3x to ASXXXX<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignfull is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<h2 class=\"wp-block-heading has-x-large-font-size\">3.2.2 Local preference<\/h2>\n\n\n\n<div class=\"wp-block-group alignfull has-global-padding is-layout-constrained wp-container-core-group-is-layout-f36bc466 wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-table is-style-default\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Value<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:1980<\/td><td class=\"has-text-align-left\" data-align=\"left\">give routes localpref below normal customer route.<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:1970<\/td><td class=\"has-text-align-left\" data-align=\"left\">give routes localpref below normal peer route.<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading has-2-x-large-font-size\">3.3 Blackholing<\/h2>\n\n\n\n<p>Please check with our team at <a href=\"mailto:bgp-filters@gtt.net\">bgp-filters@gtt.net<\/a> first, if this is enabled for your session.<\/p>\n\n\n\n<div class=\"wp-block-group alignfull is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<div class=\"wp-block-group alignfull has-global-padding is-layout-constrained wp-container-core-group-is-layout-f36bc466 wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-table is-style-default\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Value<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:2666<\/td><td class=\"has-text-align-left\" data-align=\"left\">blackhole (discard) traffic<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div id=\"complaints\" class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-8cad9bce wp-block-group-is-layout-flex\">\n<h2 class=\"wp-block-heading has-3-x-large-font-size\">Appendix<\/h2>\n\n\n\n<h2 class=\"wp-block-heading has-2-x-large-font-size\">3A.1 Ascending list of 3257:XXXX communities<\/h2>\n\n\n\n<div class=\"wp-block-group alignfull is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<div class=\"wp-block-group alignfull has-global-padding is-layout-constrained wp-container-core-group-is-layout-f36bc466 wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-table is-style-default\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Value<\/th><th class=\"has-text-align-left\" data-align=\"left\">Description<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:2000-2999<\/td><td class=\"has-text-align-left\" data-align=\"left\">Customer control<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:4000-5000<\/td><td class=\"has-text-align-left\" data-align=\"left\">Route purpose<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:6000-6999<\/td><td class=\"has-text-align-left\" data-align=\"left\">Accounting (engineering internal use only)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:7000-7999<\/td><td class=\"has-text-align-left\" data-align=\"left\">restricted route distribution (engineering internal use only)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:8000-8999<\/td><td class=\"has-text-align-left\" data-align=\"left\">receiving router loopback IP address<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:9000-9999<\/td><td class=\"has-text-align-left\" data-align=\"left\">restricted route distribution (engineering internal use only)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:10000-19999<\/td><td class=\"has-text-align-left\" data-align=\"left\">Private Interconnect egress filtering (engineering internal use only)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:30000-39999<\/td><td class=\"has-text-align-left\" data-align=\"left\">Private Interconnect ingress tagging<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3257:50000-59999<\/td><td class=\"has-text-align-left\" data-align=\"left\">Geographic origin tagging<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Jump to: 1. Introduction 2. Egress communities 3. Ingress communities 1. Introduction 2. Egress communities These are communities which are relayed from AS3257 to their peers. 2.1 Origin communities\u200b 2.1.1 General Value Description 3257:4000 tags a GTT customer route. 3257:5000 a GTT originated route. 2.1.1.1 Accounting Value Description 3257:6001 temporary dbb class 1 (allocation policy [&hellip;]<\/p>\n","protected":false},"author":74,"featured_media":0,"parent":57471,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-templates\/blocks.php","meta":{"_acf_changed":false,"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":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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