[c-nsp] C2960G and output drops

[Alexandre Snarskii]

On Wed, Oct 01, 2008 at 07:08:57AM -0400, McEvilly, Patrick wrote:
> > 
> > IOS version on the switch is 12.2(46)SE, but I had (25)SEE on it before
> > that, and observed the same symptoms (except that (25)SEE does not 
> > display the output drops in the counters).

Counters problem is CSCsj53001: 

The Total output drops field in the show interfaces privileged EXEC 
command output now displays accurate ASIC drops. 

fixed-in 12.2(44)SE1. 

So, looks like we may face the same problem: our TDMoIP people 
reporting some minor packet loss, and we were just unable to find 
packet loss point - 12.2(35)SE1 just does not reports packet drops... 

Interesting enough, that our setup is quite differs with yours: 
we have no audio/video streaming, that's classic customer (and
some colocation) aggregation switch with ~800Mbit of traffic: 

  5 minute input rate 221500000 bits/sec, 65646 packets/sec
  5 minute output rate 607959000 bits/sec, 83542 packets/sec

(that's etherchannel, 2x 1Ge, utilisation of both ports is less 
than half: 

  5 minute input rate 109153000 bits/sec, 33306 packets/sec
  5 minute output rate 342405000 bits/sec, 44080 packets/sec

  5 minute input rate 112820000 bits/sec, 31775 packets/sec
  5 minute output rate 252582000 bits/sec, 38455 packets/sec
).

-- 
Alexandre Snarskii

If you ask a stupid question, you may feel stupid. 
If you don't ask a stupid question, you remain stupid.
                                       -Tony Rothman, Ph.D.U. Chicago, Physics