[Sysadmins] Diagnosing IOS meltdowns

Nick Hilliard nick at netability.ie
Wed Jul 8 16:57:35 IST 2009


On 08/07/2009 16:42, Paul Jakma wrote:
> So, aside the proc command, running etherape and setting up Ntop, are
> there other things you should be looking at when an IOS box goes
> treacle slow every now and down?

as in forwarding packets or slowness on the vty?  if the latter, and 
there's nothing else obvious going on, it might be useful to enable CoPP 
before doing any serious problem diagnosis.  IOS doesn't deal with traffic 
to the host (or RP if you're on a hardware-forwarding box) very well.

The usual suspects in the process list are IP Input, and various bits of 
the bgp stack.

Nick



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