AS207530 - BGP Communities

AS207530 uses BGP Large Communities (RFC 8092) exclusively, in the format (207530, function, parameter) or 207530:function:parameter.

Origin & Type (set on import)
Community	Meaning
207530:1:0	Locally originated
207530:1:1	Learned from transit
207530:1:2	Learned from peering
207530:1:3	Learned from downstream
207530:1:4	Learned from IXP BGP.Exchange
207530:1:5	Learned from IXP nine-IX
207530:1:6	Learned from IXP EVIX
207530:1:7	Learned from IXP DE-CIX (deprecated)
207530:1:8	Learned from IXP LocIX DUS
207530:1:9	Learned from IXP LocIX FRA (deprecated)
207530:1:10	Learned from IXP Inter-IX

Location (PoP) (set on import)
Community	Location
207530:2:1	Frankfurt, DE, EU
207530:2:2	Amsterdam, NL, EU
207530:2:3	Dusseldorf, DE, EU
207530:2:4	London, GB, EU (deprecated)
207530:2:5	St. Louis, MO, USA (deprecated)

Action Communities (may be set by downstreams)
Community	Effect
207530:100:0	Do not announce externally (NO-EXPORT)
207530:101:0	Prepend AS once on external announce
207530:102:0	Prepend AS twice on external announce
207530:103:0	Prepend AS three times on external announce

Well-known Communities (RFC 1997 / RFC 7999 / RFC 8326)
Community	Meaning
65535:0	GRACEFUL_SHUTDOWN
65535:666	BLACKHOLE (only /32 or /128)
65535:65281	NO_EXPORT: do not export outside the local AS
65535:65282	NO_ADVERTISE: do not advertise to any peer
65535:65283	NO_EXPORT_SUBCONFED: do not advertise to peers
65535:65284	NOPEER: do not advertise to peers (RFC 3765)

Notes for downstreams
Set the action communities on your announced prefixes to control routing through AS207530 (prepending or NO-EXPORT). The origin and location communities (207530:1:x and 207530:2:x) are set by AS207530 itself and should not be sent. The well-known communities above are honoured where applicable (e.g. BLACKHOLE triggers a local RTBH discard route for the tagged prefix).