Has anyone managed to get RIP updates to work over a VPN? I have a customer split over three sites, 2820n's at each site.

The main site (A) has a VPN (LAN-LAN) to site (B) & (C) The IP handsets work Peer-Peer meaning that site B & C must see each other at the IP layer. I've tried to get RIP to work 'no joy' In this setup I could opt for a default-route at my two remote sites but in a larger network that won't be a workable solution.

Any help from anyone who has got an IP routing protocol to work would be v.much appreciated.

Tony