A VPRN can be configured to belong to a BGP confederation. BGP confederations are one technique for reducing the degree of IBGP meshing within an AS. When the confederation command is in the configuration of a VPRN the type of BGP session formed with a VPRN BGP neighbor is determined as follows:
The session is of type IBGP if the peer AS is the same as the local AS.
The session is of type confed-EBGP if the peer AS is different than the local AS AND the peer AS is listed as one of the members in the confederation command.
The session is of type EBGP if the peer AS is different than the local AS AND the peer AS is not listed as one of the members in the confederation command.