Configuring BGP Route Target Filtering
BGP route target filtering allows you to distribute VPN routes to only the routers that need them. In VPN networks without BGP route target filtering configured, BGP distributes all VPN routes to all VPN peer routers.
The following sections provide an overview of BGP route target filtering and how to configure it for VPNs:
For more information on BGP route target filtering, see the Internet draft draft-marques-ppvpn-rt-constrain-01.txt, Constrained VPN Route Distribution.