VPRN Functions--- Control Plane

VPRN functions can be split into two

1> Control Plane functions

2> Data Plane functions

Control Plane functions:-

Learning of Routes:- Routes are learned from the local PE, and populates the routes in the VRF of the customer, it also learns routes from the remote PE and populate the VRF based on the specific parameters associated with the routes.

Propogation of routes:-

Routes learned from the local CE are propogated to the remote PE across the provider core. Also the routes that are not learned locally from the local CE are propogated to the local CE in the same VPRN.

Transport tunnels needs to be established first between the PE's.

Maintaining Customer Security:- When a PE receives routes from a CE it must be populated to the correct VRF associated to the customer. Routes received from one customer should not be advertised to a vrf of another customer.

Overlapping customer prefixes:- Provider network must manage overlapping customer networks ie the same ip prefixes should remain unique across the provider network this is the resposibility of  the SP.