I have a Catalyst 3550 and 3750 stack in two separate locations, with GRE tunnels configured on our WAN links. Both switches are experiencing fairly high (70+ percent) CPU utilization, and the majority of this utilization is from the IP Input process...

I am attempting to establish an IPSEC connection between two Cisco routers. The The following is the partial output of "debug crypto isakmp" on one of the routers (IPs altered): Sep 16 17:00:04: ISAKMP (0:1): sending packet to 1.2.3.4 my_port 500 pee...