[c-nsp] Debugging Dropped Traffic

[Oliver Boehmer (oboehmer)]

John Neiberger <> wrote on Tuesday, May 09, 2006 4:58 PM:

> I saw this question asked on another list and I'm curious to find out
> if there is a good answer. A user has a high priority queue and a
> default queue configured on an interface on a 1751 running some flavor
> of 12.2. He is having intermittent dropped packets in the default
> queue, as you would expect. However, he's wondering if there is some
> sort of debugging that would show which packets are being dropped.
> 
> He's having other issues on the link and he'd like to find out if
> adding another queue would be a good idea. I think he should already
> know which traffic types are on his network that would require
> priority handling, but that's beside the point.
> 
> Is debug ip packet the only way to see which packets are being dropped
> or is there something a bit more granular available?

don't think if debug ip packet would help here. 
I'm not sure, but you could try running netflow on this box (enabled on
the ingress interface), it might report dropped packets in the cache
with output interface Null.

	oli