BGP Community Filtering

Provide a BGP community filtering mechanism to peers

TurkIX route server peers are able to manipulate outbound routing policies via an in-band mechanism using BGP communities.

Currently, we offer the following options:

Do not announce a prefix to a certain peer: 0:peer-as

Announce a prefix to a certain peer: 60850:peer-as

Do not announce a prefix to any peer: 0:60850

For destination peers employing a 32-bit ASN, you can use the large BGP community as follows:

do not announce a prefix to a certain peer: 60850:0:peer-as

announce a prefix to a certain peer: 60850:1:peer-as

do not announce a prefix to any peer: 60850:0:0

For destination peers employing a 32-bit ASN, you also can use the route target extended BGP community as follows:

do not announce a prefix to a certain peer: RT:0:peer-as

announce a prefix to a certain peer: RT:60850:peer-as

do not announce a prefix to any peer: RT:60850:0

AS path prepending

TurkIX route server peers are able to add one or more AS numbers to the left side of the AS path and advertise it only to a certain member(s) by using below large BGP communities:

prepend with one AS number to a certain peer: 60850:101:peer-as

prepend with two AS numbers to a certain peer: 60850:102:peer-as

prepend with three AS numbers to a certain peer: 60850:103:peer-as