[c-nsp] Catalyst 6500 switchport input drops

[Matt Ryan]

Seeing a large number of drops on a switchport interface without any obvious
reason (no errors, buffer misses, CPU load etc):

Router#sh int fa2/2
FastEthernet2/2 is up, line protocol is up (connected)
  Hardware is C6k 100Mb 802.3, address is 0004.de84.1431 (bia 0004.de84.1431
)
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 18w2d, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/2000/1158238/0 (size/max/drops/flushes); Total output
drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 128000 bits/sec, 113 packets/sec
  5 minute output rate 2000 bits/sec, 2 packets/sec
     943186717 packets input, 180091004357 bytes, 0 no buffer
     Received 126945712 broadcasts (22133563 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     47163411 packets output, 7169043006 bytes, 0 underruns
     0 output errors, 0 collisions, 4 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out

Router#sh int fa2/2 counters errors

Port        Align-Err    FCS-Err   Xmit-Err    Rcv-Err UnderSize OutDiscards
Fa2/2               0          0          0          0         0           0

Port      Single-Col Multi-Col  Late-Col Excess-Col Carri-Sen     Runts
Giants
Fa2/2              0         0         0          0         0
0         0

Port       SQETest-Err Deferred-Tx IntMacTx-Err IntMacRx-Err Symbol-Err
Fa2/2                0           0            0            0          0

Any idea's what else to look for?



Matt.