BGP communities

InterIX provides BGP community filtering mechanism to peers

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

Available options

  • Do not announce a prefix to a certain peer: 0:peer-as
  • Announce a prefix to a certain peer: 56584:peer-as
  • Do not announce a prefix to any peer: 0:56584
Available options

Large BGP communities

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: 56584:0:peer-as
  • Announce a prefix to a certain peer: 56584:1:peer-as
  • Do not announce a prefix to any peer: 56584:0:0
Large BGP communities

Route target extended BGP community

  • do not announce a prefix to any peer: RT:56584:0
  • do not announce a prefix to a certain peer: RT:0:peer-as
  • announce a prefix to a certain peer: RT:56584:peer-as
Route target extended BGP community

AS path prepending

InterIX 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: 56584:101:peer-as
  • prepend with two AS numbers to a certain peer: 56584:102:peer-as
  • prepend with three AS numbers to a certain peer: 56584:103:peer-as
AS path prepending