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

Phil Mayers p.mayers at imperial.ac.uk
Mon Feb 11 10:22:53 EST 2013

On 11/02/13 15:18, Tassos Chatzithomaoglou wrote:
> "show standby redirect" should provide some info.

Not that I can see:

Interface    Redirects Unknown   Adv      Holddown
VlXXX        enabled   enabled   30       180

Active       Hits  Interface Group Virtual IP            Virtual MAC
local        0     Vl9       0     x.x.x.1               0000.0c9f.f000

> Since these redirects are controlled by HSRP (which changes the internal IPs), maybe there is no way to change their
> interval.

Maybe. The specific thing I'm interested in is understanding how the 
forwarding happens, and what path the punts take (via CoPP, MLS limits, 
or other); I'm assuming from the lack of CPU problems on this box that 
the PFC/DFC is forwarding the packets, except for the ones it is leaking 
to the CPU, but I can't be sure.

> There is a command to disable them though.

Maybe, but I want to understand the problem before I do that, and to do 
that, I need to understand the path the packets take through the box.

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