[nsp] output buffers swapped out?

[Bulger, Tim]

I have a point to point T1 that is trickling CRC errors and the 'output
buffers swapped out' counter is incrementing about once every two
seconds.  I can't find anything on the Cisco site that explains this
counter.  Can anyone provide any info?

Thanks,
Tim


Serial5/0 is up, line protocol is up 
  Hardware is cxBus Serial
  Description: T1 to UK - for vidcon only
  Internet address is 10.14.1.29/30
  MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec, rely 255/255, load 1/255
  Encapsulation HDLC, loopback not set, keepalive set (10 sec)
  Last input 00:00:03, output 00:00:02, output hang never
  Last clearing of "show interface" counters 03:45:26
  Input queue: 0/75/0 (size/max/drops); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/64/0 (size/threshold/drops) 
     Conversations  0/122 (active/max active)
     Reserved Conversations 0/0 (allocated/max allocated)
  5 minute input rate 5000 bits/sec, 5 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     465940 packets input, 159310829 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants
     71 input errors, 71 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     321799 packets output, 123602921 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 689 output buffers swapped out
     0 carrier transitions
     RTS up, CTS up, DTR up, DCD up, DSR up