[c-nsp] OutDiscards (ME3600X)

Christian plymouth78 at googlemail.com
Thu Dec 15 03:37:50 EST 2011

Hi list,

although I'am only seeing a load of ~ 0.2 - 1 Mbps on a 100Mb-link of a
it's showing some hundred OutDiscards all 1-5 minutes.

#sh int g0/3 count err
Port        Align-Err     FCS-Err    Xmit-Err     Rcv-Err  UnderSize
Gi0/3                0            0            0            0           0

#sh int g0/3 | i CRC|rate|media|queue
  Full-duplex, 100Mb/s, media type is T
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 434
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  30 second input rate 49000 bits/sec, 33 packets/sec
  30 second output rate 119000 bits/sec, 35 packets/sec
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

It seems that this changes if I configure a policy-map with a class-default
and a queue-limit with a maximum configured size of 491520 Bytes.

policy-map foo
 class class-default
 queue-limit 491520 bytes
int g0/3
 service-policy output foo

I'am confused and feel really uncertain about this... :-(

Some enlightenment please!


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