BGP Communities_No-advertise configuration
BGP Communities
The community attribute is a transitive optional attribute. Communities can be used to mark a set of prefixes that share a common property. Any BGP router can tag routes in incoming and outgoing routing updates or when doing redistribution.By default, communities are stripped in outgoing bgp update.
BGP community types:-
Well known (pre-defined
Own communities
Well known communities (predefined)
- Internet: advertise this route to the internet community, any route belong to this community
- No-export: do not advertise to EBGP peers; keep this route an AS only.
- No-advertise: do not advertise this route to any peer, internal or external.
- Local-AS: use in confederation scenarios, prevent the transmit of packet outside the local sub AS.
Topology:
