[c-nsp] Packet loss w/ GEIP on 7500

[David Coulson]

GEIP using dot1q running  12.2(18)S11 - I get around 10% packet loss on 
a sub-interface, until I do a 'memory cache-policy io uncached'. I 
noticed there were some really old bug fixes for 12.0 (I think -  maybe 
it was even 11) where this fixed problems with tunnels, however I'm 
curious to figure out why it's doing this with 12.2S.

GigabitEthernet4/0/0 is up, line protocol is up
   Hardware is cyBus GigabitEthernet Interface, address is 
0001.c958.4080 (bia 0001.c958.4080)
   MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
      reliability 255/255, txload 1/255, rxload 6/255
   Encapsulation 802.1Q Virtual LAN, Vlan ID  1., loopback not set
   Keepalive set (10 sec)
   Full-duplex, 1000Mb/s, link type is auto, media type is
   output flow-control is on, input flow-control is on
   ARP type: ARPA, ARP Timeout 04:00:00
   Last input 00:00:00, output 00:00:00, output hang never
   Last clearing of "show interface" counters 01:35:40
   Input queue: 0/2500/0/0 (size/max/drops/flushes); Total output drops: 
11874
   Queueing strategy: fifo
   Output queue: 0/40 (size/max)
   30 second input rate 27227000 bits/sec, 4236 packets/sec
   30 second output rate 7561000 bits/sec, 3425 packets/sec
      29712931 packets input, 25413026994 bytes, 0 no buffer
      Received 80973 broadcasts (1109 IP multicast)
      0 runts, 0 giants, 0 throttles
      0 input errors, 0 CRC, 0 frame, 3707 overrun, 93727 ignored
      0 watchdog, 14548 multicast, 0 pause input
      23576118 packets output, 7069800887 bytes, 0 underruns
      0 output errors, 0 collisions, 0 interface resets
      0 babbles, 0 late collision, 0 deferred
      0 lost carrier, 0 no carrier, 186 PAUSE output
      0 output buffer failures, 0 output buffers swapped out


David