Input and CRC errors. Likely problem?

phoeneous

Telco is pointing at my wic-1dsu-t1 card as having the problem. I think it's something on their end. They didn't do an end to end intrusive test but they tested from the niu back to CO and said it was fine. Thoughts?

Note: It may seem like a small number of input and crc errors but that's because I just cleared the counters. It was in the 8 digits at one point.

My_Router#sh int s0/3/0
Serial0/3/0 is down, line protocol is down
  Hardware is GT96K with integrated T1 CSU/DSU
  Description: P2P
  Internet address is 10.100.0.1/30
  MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
     reliability 252/255, txload 1/255, rxload 1/255
  Encapsulation HDLC, loopback not set
  Keepalive set (10 sec)
  Last input 00:03:31, output 00:03:30, output hang never
  Last clearing of "show interface" counters 00:17:05
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 16
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshold/drops)
     Conversations  0/21/256 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 1158 kilobits/sec
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     11434 packets input, 831717 bytes, 0 no buffer
     Received 73 broadcasts, 0 runts, 3 giants, 0 throttles
     32048 input errors, 32048 CRC, 14021 frame, 7626 overrun, 0 ignored, 23837 abort
     9334 packets output, 716822 bytes, 0 underruns
     0 output errors, 0 collisions, 12 interface resets
     0 output buffer failures, 0 output buffers swapped out
     5 carrier transitions
     DCD=down  DSR=up  DTR=up  RTS=up  CTS=down

Forsaken_GA

they're only responsible for the connection up to the demarc, if everything tests fine from there, the problem is on your side, and they're not going to be any help. You should be able to plug something directly into the NIU and test the connection from there. If it all works fine, then it's your wiring or your hardware or your configuration. If it doesn't, then you can call them up and tell them they're a bunch of liars.

SteveO86

this document may be of some use.. At least for testing your equipment.

Loopback Tests for T1/56K Lines - Cisco Systems

I would also clear the counter before testing in loopback mode.

hasitha257

Just curious, How long is the cable between your NIU and router ? is there a patch panel in between ? Also when you do a show serivce-module , are you seeing LCVs incrementing or PCVs incrementing ? LCVs usually indicate a local copper problem ( between your router and NIU ).

Also, just for your future use ( especially if you own a T1, MLPPP T1s) keep a male and female loopback plugs handy .