Is this normal behaviour when I have a GRE tunnel between PE and CPE? When I tried to icmp from PE to CPE tunnel address I got the following output in CPE and the ping fails.
Jul 4 16:52:57: Tunnel1: adjacency fixup, 10.36.73.1->10.36.85.156, tos=0x0
The tunnel is up but ping fails and I have configured ip mtu 1476 and ip tcp adjust-mss 1436 in CPE.
The same configuration works in other CPE and configuration is same.