I have an 1821 router with VPN configured between two sites. On one of the routers i keep getting messages in Log file - "critical memory allocation of 65548 bytes failed from 0x400C615C, alignmet 32. When I do a show buffers the normal buffers, 1548 bytes, shows 1251600 hits, 1307865 misses, 93615 failures. The FE 0/0 also shows lots of misses. The FE 0/0 is the internal LAN. On both routers for FE 0/1 (outside) interface I have put crypto ipsec df-bit clear. Any ideas why I am getting these failures.
I have this problem too.