I have three sites connected via various links, the highest common MTU seems to be 1244. I changed a client in one site and a client in another site to test this, by setting the MTU on the adapters in the registry. Now I can't ping either machine with ping "client name" -l
1244 -f. What steps can I take to correct this?
This changing the MTU thing doesn't seem helpful unless you can get the equipement to take the bytes for the VPN header in to account, not just ethernet.