Client has two locations, that have had a point to point between them. To cut down on cost and increase speeds, they are switching over to a Comcast connection. I have put a RB1100 at each location. I have an IPsec tunnel created and traffic is flowing between them without issue. At the remote location their Shoretel phones and Shortel Communicator software all register with the main site. However, they cannot make or receive calls from either at the remote location. Any thoughts or ideas? Thanks!

From what I have been reading I may need to set the IPsec tunnel to clear DF bit. However, I can't find where to do this? Thanks!

I have messed with MTU, MSS, and clear DF via mangle. However, issues with phones still exist. Would I be better off with a different tunnel than IPsec? Thanks!