[c-nsp] sup720 ICMP redirects "once per second"

Phil Mayers p.mayers at imperial.ac.uk
Tue Feb 12 08:08:51 EST 2013

On 12/02/13 13:06, Pete Lumbis wrote:
>  From what I could dig up, yes, 1 per second, rate limited on a
> per-interface basis.
>  From a CEF point of view, when we do the lookup and realize we have to
> do a redirect we punt to process switching. From the 6k perspective this
> would be a specific punt to software that would be matched against the
> MLS rate limiter. At that point the ICMP code looks at the input
> interface and the last time a redirect was generated on that interface
> to determine if a new redirect should be generated.

Cool, that explains the behaviour. Now I just need to get the box 
rebooted so I can get RP SPAN working again, and maybe I can get back to 
tracking the actual underlying problem!


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