Dead Peer Detection not working

Hi all,

We have 26 branch offices using Netopia R910 routers to connect back to head office to our Cisco 2611 via VPN.

Each Netopia is configured with DPD (Dead peer detection). When our Cisco VPN router is reset the branches do not automatically come “alive”, we have to go and manually reset the branch routers and only then will they re-establish the VPN tunnel.

Any ideas????