Lukas, thanks! Once I disabled the checksum calculation for GRE header and payload, the process switched traffic dropped from ~600 pps in both directions on Fa0/0 and Fa0/1 to 7-8 pps. Rest of the traffic is CEF-switched. CPU usage is around 10%.
Martin On 11/28/14, Lukas Tribus <[email protected]> wrote: >> interface Tunnel0 >> bandwidth 10000 >> ip unnumbered FastEthernet0/0 >> tunnel source FastEthernet0/1 >> tunnel destination 10.10.10.195 >> tunnel key 10213 >> tunnel checksum >> tunnel path-mtu-discovery >> end >> >> Ass five(Tu0 - Tu5) GRE tunnels configured to this router have similar >> configuration with exception that some have "ip mtu" or "keepalive" >> configured. >> >> Has anyone seen similar behavior before? > > I strongly suggest to disable "tunnel checksum", because this will > bypass CEF and you end up process switching everything (a part from > the fact the the actual checksumming takes it toll as well). > > > > Regards, > > Lukas > > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
