[c-nsp] Debugging Dropped Traffic

[Rodney Dunn]

On Tue, May 09, 2006 at 08:57:32AM -0600, John Neiberger wrote:
> 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.

No. There isn't a good way.

> 
> 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?

No. Forget the debugs because they only work at process level
and I sure hope you are not running packets at process level.

You need to get a sniffer trace and compare that against your
class-map matches.

Not easy but it's the only real way.

Rodney

> 
> Thanks,
> John
> 
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