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New Member

7206VXR router POS interface loopback

Hi All,

We have a 7206vxr router with a pos interface: its PA-POS-1OC3 card currently in up/down status:

We already repalced the card but still same (up/down) condition.

R01#sh int pos 1/0

POS1/0 is up, line protocol is down

  Hardware is Packet over Sonet

  Description: PPP link to MPLS PE

  Internet address is *****************

  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation PPP, LCP ACKsent, crc 32, loopback not set

  Keepalive set (10 sec)

  Scramble enabled

  Last input 00:00:05, output never, output hang never

  Last clearing of "show interface" counters 4d12h

  Input queue: 0/1000/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 4/40 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     75362 packets input, 1356464 bytes, 0 no buffer

     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

              0 parity

     4 input errors, 7 CRC, 0 frame, 0 overrun, 0 ignored, 3 abort

     1628 packets output, 25438 bytes, 0 underruns

     0 output errors, 0 applique, 5469 interface resets

     0 output buffer failures, 0 output buffers swapped out

     1 carrier transitions

I tried putting an internal loop on the interface (new card): still it doesnt come up! as per my knowledge internal loopback means a loop within the card right? then its not coming up for internal loop also means even the new card has gone faulty or do I need replace the whole chasis?

R01#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
R01(config)#int pos 1/0
R01(config-if)#loopback ?
  internal  internal
  line      line

R01(config-if)#loopback internal

R01#sh int POS1/0

POS1/0 is up, line protocol is down

  Hardware is Packet over Sonet

  Description: PPP link to MPLS PE

  Internet address is 192.168.211.49/30

  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation PPP, LCP Listen, crc 32, loopback set (internal)

  Keepalive set (10 sec)

  Scramble enabled

  Last input 00:00:54, output never, output hang never

  Last clearing of "show interface" counters 4d12h

  Input queue: 0/1000/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     75090 packets input, 1351616 bytes, 0 no buffer

     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

              0 parity

     4 input errors, 7 CRC, 0 frame, 0 overrun, 0 ignored, 2 abort

     1628 packets output, 25438 bytes, 0 underruns

     0 output errors, 0 applique, 5431 interface resets

     0 output buffer failures, 0 output buffers swapped out

     0 carrier transitions

Everyone's tags (3)
3 REPLIES
Hall of Fame Super Gold

7206VXR router POS interface loopback

Do something else: loopback the circuit.

The objective is to prove to telco that the circuit is faulty, not the router.

New Member

7206VXR router POS interface loopback

Did you ever figure this out? 

New Member

7206VXR router POS interface loopback

Yes Vblaha,

We replaced the chasis & WIC card with same configuration. The link came up.

So basically I understand it was chasis fault that made the WIC card not respond to even an internal loopback

Any more suggestions on this?

Thanks

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