Hi
We have about 1000 sites connected to a hub site
The setup is DMVPN. And we are using Get VPN upon this
We are using Cisco 898 with 2 links [local loop and 3G] for each branch
We have a problem that suddenly most of our branches are facing a network connectivity problem
They can't access DNS that resides at the hub site . But all troubleshooting shows all is good
show crypto gdoi gm - shows as registered for both local loop and 3G
But local branch network can't reach DNS at DC at hub site
Using "clear crypto gdoi" at the branch site, solved the problem and the network is able to ping DNS now
This is without any configuration change
Why this problem happen and why this solved by the clear command
Thanks
