{"pageProps":{"meta":{"picture":"https://retn.net/storage/2022/09/13/0cba60336ad926bd7db0815d4403a331539e4863.jpg","page":"bgp-communities","title":"BGP Communities: Routing Details and Prepending Information | RETN","description":"Detailed information on BGP communities used by RETN, including routing types, regional settings, and specific ASN prepending rules. 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If the downstream's route is not tagged with common\r\n         community, then community 9002:65530 is applied on ReTN side\r\n         (advertise everywhere without prepending)\r\n\r\n         <b>2.Regional, prepending to peers (not customers) in Regions:</b>\r\n\r\n         64666:6553X\r\n         X < 5       prepend X times to all peers in Europe\r\n         X = 5       advertise to customers but not to peers in EU\r\n\r\n         64777:6553X\r\n         X < 5       prepend X times to all peers in North America\r\n         X = 5       advertise to customers but not to peers in NA\r\n\r\n         64888:6553X\r\n         X < 5       prepend X times to all peers in Asia-Pacific\r\n         X = 5       advertise to customers but not to peers in APAC\r\n\r\n         <i>Note #2</i>. If downstream tags the route with regional community,\r\n         then common community 9002:6553X is ignored in proper Region\r\n\r\n         <b>3. Specific, prepending to peer ASN:</b>\r\n\r\n         ASN:6553X\r\n         X < 5       prepend X times to peer ASN\r\n         X = 5       do not advertise to peer ASN\r\n\r\n         <i>Note #3</i>. Specific communities are applied for a limited subset\r\n         of peers, listed below (see Appendix)\r\n\r\n         <i>Note #4</i>. If downstream tags the route with specific community\r\n         ASN:6553X, then common and regional communities are ignored\r\n         while advertising to peer ASN (if present in Appendix)\r\n\r\n         <b>4. Blackhole:</b4>\r\n\r\n         9002:666\r\n\r\n         <i>Note #5</i>. Unaccepted bgp communities, including well-known ones,\r\n         are ignored and stripped\r\n\r\n         <b>Appendix</b>. Specific communities are applied for ASNs:\r\n\r\n         IPv4 peers\r\n         ==========\r\n         702      MCI Europe / Verizon Business EMEA\r\n         1273     Vodafone GlobalNet / Cable and Wireless\r\n         1299     Telia Carrier / TeliaSonera\r\n         2603     NORDUnet\r\n         2686     AT&T EMEA\r\n         2860     NOS Comunicacoes\r\n         2914     NTT Global\r\n         3209     Vodafone / Arcor\r\n         3216     VimpelCom / BeeLine / Golden Telecom\r\n         3257     GTT Communications / Tiscali\r\n         3320     Deutsche Telekom\r\n         3356     Lumen / CenturyLink / Level3\r\n         3491     PCCW Global\r\n         3786     LG UPlus / DACOM\r\n         4134     China Telecom\r\n         4230     Embratel\r\n         4637     Telstra / Reach Network\r\n         4766     KORnet / Korea Telecom\r\n         4788     TMnet / Telekom Malaysia\r\n         5400     British Telecom\r\n         5432     Proximus / Skynet / Belgacom\r\n         5511     Orange Worldwide\r\n         6327     Shaw Cablesystems / Big Pipe\r\n         6453     TATA Communications / Teleglobe\r\n         6461     Zayo / AboveNet Communications\r\n         6663     Turk Telekom / EuroWeb / Pantel\r\n         6762     Telecom Italia Sparkle / SeaBone\r\n         6805     Telefonica Germany\r\n         6830     Liberty Global / UPC Broadband\r\n         6849     UkrTelecom\r\n         6939     Hurricane Electric\r\n         7473     Singapore Telecommunications\r\n         8218     Zayo France / NeoTelecoms\r\n         9121     Turk Telekom\r\n         9498     Bharti Airtel\r\n         12874    Fastweb\r\n         12956    Telefonica Wholesale Network / Telxius Cable\r\n         15557    SFR Group / LDCOM Networks\r\n         19151    Broadband One / WV Fiber\r\n         20562    Open Peering Initiative\r\n         23640    BBIX (Tokyo) Route Servers (for APAC customers only)\r\n         24115    Equinix (Singapore) Route Servers (for APAC customers only)\r\n         33108    SIX Route Servers (for APAC customers only)\r\n         39386    Saudi Telecom\r\n         45686    JPNAP Route Servers (for APAC customers only)\r\n         58453    China Mobile International\r\n         59369    BBIX (Singapore) Route Servers (for APAC customers only)\r\n\r\n         IPv6 peers\r\n         ==========\r\n         702      MCI Europe / Verizon Business EMEA\r\n         1121     VIX Route Servers\r\n         1273     Vodafone GlobalNet / Cable and Wireless\r\n         1299     Telia Carrier / TeliaSonera\r\n         2914     NTT Global\r\n         3216     VimpelCom / BeeLine / Golden Telecom\r\n         3257     GTT Communications / Tiscali\r\n         3320     Deutsche Telekom\r\n         3356     Lumen / CenturyLink / Level3\r\n         3491     PCCW Global\r\n         4134     China Telecom\r\n         5406     BNIX Route Servers\r\n         5507     BiX Route Servers\r\n         5511     Orange Worldwide\r\n         6453     TATA Communications / Teleglobe\r\n         6461     Zayo / AboveNet Communications\r\n         6695     DE-CIX Frankfurt Route Servers\r\n         6762     Telecom Italia Sparkle / SeaBone\r\n         6777     AMS-IX Route Servers\r\n         6805     Telefonica Germany\r\n         6939     Hurricane Electric\r\n         8714     LINX Route Servers\r\n         9121     Turk Telekom\r\n         9498     Bharti Airtel\r\n         12956    Telefonica Wholesale Network / Telxius Cable\r\n         13538    NYIIX Route Servers\r\n         15557    SFR Group / LDCOM Networks\r\n         16374    BCIX Route Servers\r\n         23640    BBIX (Tokyo) Route Servers (for APAC customers only)\r\n         24115    Equinix (Singapore) Route Servers (for APAC customers only)\r\n         33108    SIX Route Servers (for APAC customers only)\r\n         42476    SwissIX Route Servers\r\n         43760    INEX Route Servers\r\n         45686    JPNAP Route Servers (for APAC customers only)\r\n         51706    France-IX Route Servers\r\n         59369    BBIX (Singapore) Route Servers (for APAC customers only)\r\n</pre>"}],"_nextI18Next":{"initialI18nStore":{"en":{"common":{"customer-portal":"Customer Portal","more-info-btn":"Read more","products-gallery":"Products Gallery","section-bottom-title":"Haven’t found the answer?","section-bottom-other-links":"Other useful links","we-are-social":"We are social","want-socialise":"Do you want to socialise with us?","copyright":"RETN GROUP OF COMPANIES. 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