[c-nsp] Cisco 7206 NPE-G1 with ouput drops

[Thomas Braun]

Hi,

our cisco 7206 with a NPE-G1 has a lot of output drops, but we haven't
found the reason.
I first captured this output:
Input queue: 1/75/90/10 (size/max/drops/flushes); Total output drops: 553566

After a cap of 3 seconds i got this:
Input queue: 3/75/90/10 (size/max/drops/flushes); Total output drops: 555262

On the other site is a foundry switch it has no input errors or output
errors.
The interfaces, on both systems, are running with 1000Base-T Full-Duplex.

The CPU level is ok
CPU utilization for five seconds: 31%/29%; one minute: 35%; five
minutes: 34%
and the memory utilisation is also OK:

               Head    Total(b)     Used(b)     Free(b)   Lowest(b) 
Largest(b)
Processor   62AEE3C0   458299480   167317132   290982348    16516772  
273750124
      I/O    E000000    33554432     8711024    24843408    24782320   
24793400

The Cisco is running 12.2.25S5

We  have found the command "#sh ip cef switching statistics" it shows us
a high drop rate under "RP PAS Features"  line
RP PAS Features                   107436199          0        206
1 second cap:
RP PAS Features                   107504040          0        206

But we haven't found an explanation to that line.

Could that be the problem or has anyone a hint how to find the problem?

On the interface is a load of 160 Mbit,

Here are 2 outpus with sh int gi0/2 with a gap of 3 seconds:
GigabitEthernet0/2 is up, line protocol is up
  Hardware is BCM1250 Internal MAC, address is 0001.6393.781a (bia
0001.6393.781a)
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 40/255, rxload 40/255
  Encapsulation 802.1Q Virtual LAN, Vlan ID  1., loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, media type is RJ45
  output flow-control is off, input flow-control is off
  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 00:33:30
  Input queue: 1/75/90/10 (size/max/drops/flushes); Total output drops:
553566
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  30 second input rate 157353000 bits/sec, 40785 packets/sec
  30 second output rate 160693000 bits/sec, 33750 packets/sec
     83649264 packets input, 1216325537 bytes, 0 no buffer
     Received 0 broadcasts (0 IP multicast)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 291 overrun, 0 ignored
     0 watchdog, 127703 multicast, 0 pause input
     69783636 packets output, 3884779920 bytes, 0 underruns
     0 output errors, 0 collisions, 0 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

GigabitEthernet0/2 is up, line protocol is up
  Hardware is BCM1250 Internal MAC, address is 0001.6393.781a (bia
0001.6393.781a)
   MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 40/255, rxload 40/255
  Encapsulation 802.1Q Virtual LAN, Vlan ID  1., loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, media type is RJ45
  output flow-control is off, input flow-control is off
  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 00:33:36
  Input queue: 3/75/90/10 (size/max/drops/flushes); Total output drops:
555262
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  30 second input rate 157605000 bits/sec, 40660 packets/sec
  30 second output rate 158627000 bits/sec, 33484 packets/sec
     83890435 packets input, 1334523176 bytes, 0 no buffer
     Received 0 broadcasts (0 IP multicast)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 292 overrun, 0 ignored
     0 watchdog, 128338 multicast, 0 pause input
     69977234 packets output, 3995906900 bytes, 0 underruns
     0 output errors, 0 collisions, 0 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


Thanks for your answers.

cu thomas