[c-nsp] CRC errors on DS3 interface

[Michael Axelrod]

These are ATM CRC's. You can take a look at each PVC to see if CRC errors
are associated with a specific PVC:
sh atm pvc x/y
Mike
BTW, I do not believe that there is a CRC in a DS3 frame - I think if you
are using ADM -  ATM direct mapping
 in DS3 M-frame  (as opposed to PLCP),
ADM  calculates a CRC  based on ATM header, but not sure if these CRC's are
reported by the interface.

Mike

From: "james edwards" <hackerwacker at cybermesa.com>
To: <cisco-nsp at puck.nether.net>
Sent: Thursday, January 13, 2005 2:22 PM
Subject: [c-nsp] CRC errors on DS3 interface


> If I am seeing DS3 errors on the main interface (PA-A3-T3) are these DS3
> CRC's or AAL5 CRC's ?
>
> ATM4/0 is up, line protocol is up
>   Hardware is ENHANCED ATM PA
>   Description: Qwest 54/HFGJ/000332//ACSO
>   MTU 4470 bytes, sub MTU 4470, BW 44210 Kbit, DLY 190 usec,
>      reliability 255/255, txload 19/255, rxload 5/255
>   Encapsulation ATM, loopback not set
>   Encapsulation(s): AAL5
>   4095 maximum active VCs, 544 current VCCs
>   VC Auto Creation Disabled.
>   VC idle disconnect time: 300 seconds
>   0 carrier transitions
>   Last input 00:00:00, output 00:00:00, output hang never
>   Last clearing of "show interface" counters 2d01h
>   Input queue: 0/75/16/0 (size/max/drops/flushes); Total output drops: 4
>   Queueing strategy: Per VC Queueing
>   5 minute input rate 926000 bits/sec, 500 packets/sec
>   5 minute output rate 3370000 bits/sec, 716 packets/sec
>      61096504 packets input, 3481150315 bytes, 0 no buffer
>      Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
>      5395 input errors, 4286 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
>      88573704 packets output, 2959003499 bytes, 0 underruns
>      4 output errors, 0 collisions, 0 interface resets
>      0 output buffer failures, 0 output buffers swapped out
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