High CPU utilization w/VRF NAT - Cat6500

Mailman List Mirror (Read Only)
1

~80 or so static NAT's configured, multiple versions of IOS tested.
Most of the traffic is being punted to the CPU through the NAT interfaces
causing high CPU utilization.

Increasing fast aging timers had 0 benefit, TCAM utilization is less than 5%
Does anyone have any thoughts on other configuration tweaks I should try? I
think we're at the point where new hardware maybe FWSM or another platform
for NAT should be explored.

--RB

2

I would recommend you do this on a firewall (fwsm or something external)..

3

What Supervisior do you have? If its an older SUP NAT may be done in
software, which sounds
like you are currently experiencing. Its not hard to max out a 6500 CPU.

-Mike