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High CPU utilization w/VRF NAT - Cat6500



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


On Tue, Nov 13, 2012 at 1:44 PM, Kenneth McRae
<kenneth.mcrae at dreamhost.com>wrote:

> I would recommend you do this on a firewall (fwsm or something external)..
>
> On Tue, Nov 13, 2012 at 10:39 AM, Rodrick Brown <rodrick.brown at gmail.com
> >wrote:
>
> > ~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
> >
>
>
>
> --
> Best Regards,
>
>
>
> Kenneth McRae
> *Sr. Network Engineer*
> kenneth.mcrae at dreamhost.com
> Ph: 323-375-3814
> www.dreamhost.com
>