I'm interested in seeing the solution to this one. I had an old point to
point T1 with Ascent Pipeline routers that had the same problem. After
rebooting the routers the CRC errors would cease for days before starting up
again. It was so intermittent that I never did figure it out before the T1
was shut down when it wasn't needed any more (dot Com death).
----- Original Message -----
From: "David Chandler"
To:
Sent: Friday, April 27, 2001 3:40 PM
Subject: Re: ATM interface troubleshooting question. [7:2249]
> Both but mainly a cell level issue:
>
> If you lose a cell, it will screw-up the AAL5 frame. Thus causing the
> frame and/or CRC errors seen in sh int.
>
> You are really moving some traffic. Is this PVC traffic going across
> any links that may be congested? A DS3 perhaps? Need to find where the
> cells are getting dropped if you can.
>
> My $.02
>
> DaveC
>
> "[EMAIL PROTECTED] (Katson Yeung)" wrote:
> >
> > Dear all,
> >
> > My old 7507 is having a minor problem.... it is 12.0.16GD, RSP2 with
> > 64M ram and the ATM card is an AIP. I have only one VC associate with
> > this ATM port.
> >
> > I found quite a number of input errors (CRC and Frames)... how can I
> > know the source of that problem?? Is it the cell level, or the frame
> > level problem?
> >
> > See below show interface output:
> >
> > ATM0/0 is up, line protocol is up
> > Hardware is cxBus ATM
> > MTU 4470 bytes, sub MTU 4470, BW 155520 Kbit, DLY 80 usec, rely
> > 255/255, load 8/255
> > Encapsulation ATM, loopback not set, keepalive not supported
> > Encapsulation(s): AAL5, PVC mode
> > 256 TX buffers, 256 RX buffers,
> > 2048 maximum active VCs, 1024 VCs per VP, 1 current VCCs
> > VC idle disconnect time: 300 seconds
> > Last input 00:00:00, output 00:00:00, output hang never
> > Last clearing of "show interface" counters 3d10h
> > Queueing strategy: fifo
> > Output queue 0/40, 0 drops; input queue 1/75, 40 drops
> > 5 minute input rate 34782000 bits/sec, 4564 packets/sec
> > 5 minute output rate 5307000 bits/sec, 3372 packets/sec
> > 1174284787 packets input, 1013959162 bytes, 0 no buffer
> > Received 0 broadcasts, 0 runts, 0 giants, 11 throttles
> > 13076769 input errors, 13054514 CRC, 22255 frame, 0 overrun, 0
> > ignored, 0 abort
> > 893230791 packets output, 346650156 bytes, 0 underruns
> > 0 output errors, 0 collisions, 0 interface resets
> > 0 output buffer failures, 0 output buffers swapped out
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