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Filename: communities.txt
Revision: 1116
Timestamp: 2009-02-10 14:04:24+01:00
Url: http://as3257.net/communities.txt
1. Introduction
This document describes the BGP communities which are used by Tiscali
International Network (AS3257). These communities can be used for their
pure informational value and/or to modify the behaviour of the routing
service provided by AS3257.
2. Egress Communities
These are communities which are relayed from AS3257 to their peers.
2.1 Origin Communities
2.1.1 General
3257:4000 tags a TINet customer route.
3257:5000 tags a TINet own route.
2.1.2 Exchanges
3257:4400-4499 tags EU exchange points (details upon request).
3257:4500-4599 tags US exchange points (details upon request).
2.1.3 Geographical
3257:50001 route originated in Europe
3257:50002 route originated in the US and Canada
3257:50003 route originated in Asia
3257:51100 route originated in the US east coast
3257:51101 route originated in NYC
3257:51102 route originated in WAS
3257:51103 route originated in MIA
3257:51104 route originated in ATL
3257:51200 route originated in the US west coast
3257:51201 route originated in SJC
3257:51202 route originated in LAX
3257:51203 route originated in PAO
3257:51204 route originated in SEA
3257:51300 route originated in the US central
3257:51301 route originated in CHI
3257:51302 route originated in DAL
3257:51303 route originated in DEN
3257:51400 route originated in Canada
3257:51401 route originated in TOR
3257:51402 route originated in MTL
3257:53000 route originated in GR
3257:53001 route originated in ATH
3257:53100 route originated in NL
3257:53101 route originated in AMS
3257:53200 route originated in BE
3257:53201 route originated in BRU
3257:53202 route originated in ANR
3257:53300 route originated in FR
3257:53301 route originated in PAR
3257:53302 route originated in MRS
3257:53400 route originated in ES
3257:53401 route originated in MAD
3257:53402 route originated in BCN
3257:53520 route originated in LU
3257:53530 route originated in IE
3257:53531 route originated in DUB
3257:53900 route originated in IT
3257:53901 route originated in TRN
3257:53902 route originated in MIL
3257:53903 route originated in BLQ
3257:53904 route originated in ROM
3257:53905 route originated in CAG
3257:53906 route originated in PSR
3257:53907 route originated in FLR
3257:53908 route originated in GOA
3257:53909 route originated in NAP
3257:53910 route originated in PMO
3257:53911 route originated in QPA
3257:54000 route originated in RO
3257:54001 route originated in BUC
3257:54100 route originated in CH
3257:54101 route originated in ZUR
3257:54102 route originated in BSL
3257:54200 route originated in CZ
3257:54201 route originated in PRG
3257:54210 route originated in SK
3257:54211 route originated in BTS
3257:54300 route originated in AT
3257:54301 route originated in VIE
3257:54400 route originated in UK
3257:54401 route originated in LON
3257:54402 route originated in MAN
3257:54500 route originated in DK
3257:54501 route originated in CPH
3257:54600 route originated in SE
3257:54601 route originated in STK
3257:54700 route originated in NO
3257:54701 route originated in OSL
3257:54800 route originated in PL
3257:54801 route originated in WAW
3257:54900 route originated in DE
3257:54901 route originated in FRA
3257:54902 route originated in DUS
3257:54903 route originated in HAM
3257:54904 route originated in MUC
3257:54905 route originated in BER
3257:56500 route originated in SG
3257:56501 route originated in SIN
3257:58520 route originated in HK (Hong Kong)
3257:58521 route originated in HKG
3257:50999 multi-national prefix (not applicable, legacy)
2.1.4 Private Interconnect
3257:30000-39999 Auto-incremental number of private interconnects
2.1.5 Loopbacks
Last digits of the loopback ip address from the router receiving the
prefix.
3257:8000-8999 loopback ip address
2.2 Traffic Engineering Communities
3. Ingress Communities
Communities which are relayed from the peers to AS3257.
Prior to activation of community announcement, it is needed to send an
email to bgp-filters@ip.tiscali.net describing the specific bgp
session(s) and intended communities to ensure proper activation on the
TINET equipment.
3.1 Restricted Route Propagation
3.1.1 Well-known Communities
AS3257 supports the use of well-known communities as defined in IETF
RFC1997 and RFC3765.
65535:65281 NO_EXPORT (RFC1997)
65535:65282 NO_ADVERTISE (RFC1997)
65535:65283 NO_EXPORT_SUBCONFED (RFC1997)
65535:65284 NOPEER (RFC3765)
3.1.2 Do Not Announce
3257:1030 do not announce to upstream. (not applicable, legacy)
3257:2490 do not announce in Europe (only applies to EU regional peers).
3257:2990 do not announce in the US (only applies to US regional peers).
3257:2998 do not announce to any peer (legacy)
65000:XXXX do not announce to ASXXXX
65010:XXXX do not announce except to ASXXXX
65535:65284 do not announce to any peer
3.2 Attribute Change
3.2.1 Prepends
3257:1031 prepend 1x to upstream. (not applicable, legacy)
3257:1032 prepend 2x to upstream. (not applicable, legacy)
3257:1033 prepend 3x to upstream. (not applicable, legacy)
3257:2491 prepend 1x in Europe (only applies to EU regional peers).
3257:2492 prepend 2x in Europe (only applies to EU regional peers).
3257:2493 prepend 3x in Europe (only applies to EU regional peers).
3257:2591 prepend 1x in Asia (only applies to Asia regional peers).
3257:2592 prepend 2x in Asia (only applies to Asia regional peers).
3257:2593 prepend 3x in Asia (only applies to Asia regional peers).
3257:2991 prepend 1x in the US (only applies to US regional peers).
3257:2992 prepend 2x in the US (only applies to US regional peers).
3257:2993 prepend 3x in the US (only applies to US regional peers).
65001:XXXX prepend 1x to ASXXXX
65002:XXXX prepend 2x to ASXXXX
65003:XXXX prepend 3x to ASXXXX
3.2.2 Local Preference
3257:1980 give routes localpref below normal customer route.
3257:1970 give routes localpref below normal peer route.
3257:1960 give routes localpref below transit route.
3.3 Blackholing
Please check with our team at bgp-filters@ip.tiscali.net first, if this
is enabled for your session.
3257:2666 blackhole (discard) traffic
APPENDIX
A.1 Ascending List of 3257:XXXX communities
3257:2000-2999 Customer Control
3257:4000-5000 Route purpose
3257:8000-8999 receiving router loopback ip address
3257:10000-19999 Private Interconnect egress filtering (eng use only)
3257:30000-39999 Private Interconnect ingress tagging
3257:50000-59999 Geographic origin tagging
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