BGP Communities
Community Attribute The community attribute provides a way of grouping destinations, called communities, to which routing decisions (such as acceptance, preference, and redistribution) can be applied. Use route-maps to set them. no-export - Do not advertise this route to EBGP peers. no-advertise - Do not advertise this route to any peer. internet - Advertise this route to the Internet community; all routers in the network belong to it.