[nsp] Rate limit on Native 6500

[sthaug at nethelp.no]

> Can someone clear this out for me,... I have following situation:
> on Catalyst 6500 (Sup1/MSFC1), running Native IOS, rate-limit is
> used on Layer 3 interface:
> 
> interface FastEthernet3/48
>  ip address xxx.xxx.xxx.xxx yyy.yyy.yyy.yyy
>  rate-limit input access-group 170 4096000 128000 128000 conform-action transmit exceed-action drop
>  rate-limit output access-group 171 4096000 128000 128000 conform-action transmit exceed-action drop
> end
> 
> In this case who is responsible for policing, MSFC or PFC?

Two important points: 

- The 6500 currently can only do rate limiting on *input* in hardware.
- You need to use policy-maps to actually utilize the hardware.

Steinar Haug, Nethelp consulting, sthaug at nethelp.no