I have two vpn concentrators on which our different office get connect as lan to lan. I configured vrrp for redundancy and RRI (Reverse Route Injection) so that when vpn concentrators make a tunnel with remote sites, they add remote networks in their routing table. ospf is configured on vpn concentrators so that they advertise all remote networks in ospf domain. Hence when vrrp master vpn box is active, all remote site establish tunnel with it. It advertises remote networks in ospf domain as i can have access to that remote network. When i unplug master, backup vpn box become active and all tunnels shift to it and it properly start advertising remote networks. Now issue is: when master come active back, all shift back to master again BUT master doesn't advertise networks again and backup keeps advertise.
I think this is because of malfunctioning of RRI. When master come up, backup box must stop advertising and master must do it again. You can find link of my topology below:
Waiting for your immediate response........