Re: Severely High Interface Reset on Serial Lines

Hi Eniola,

Since it's a Channelised E1 interface - I would suggest you look at show
controllers which gives a better view as to what is happening.

Things worth looking at would be anything indicating a clock slip or SES/UAS
and work with your service provider to isolate the issue.

From what I recall you should be able to have a reporting histogram to give
an indication as to where the errors occur. It's important to determine if
the errors come constantly or are in bursts.

http://www.cisco.com/en/US/tech/tk713/tk628/technologies_tech_note09186a00800a5cdc.shtmlmay
be able to help

Cheers,
Adam

On Sun, Apr 17, 2011 at 7:44 PM, Eniola Olaleye <eniola.olaleye_at_gmail.com>wrote:

> Hello guys,
>
> Any thoughts yet on my problems, stated below. I really need contributions
> on this issue. I will appreciate any help I can get.
>
> Cheers.
>
> Eniola
>
> On Wed, Apr 13, 2011 at 1:22 PM, Eniola Olaleye <eniola.olaleye_at_gmail.com
> >wrote:
>
> >
> > Hello guys,
> >
> > We have two routers on the end of a PPP multilink WAN link (the PPP
> bundle
> > consists of 6 E1 lines). Any time we have fluctuations in the link, we
> > suddenly have unreasonably high interface reset values as highlighted in
> the
> > "sh int" output below. The "sh ver" output is also shown, mainly the IOS
> > section. Please assist in getting to the root of this problem. Regards.
> >
> >
> > Router#sh int se0/0/0:1
> > Serial0/0/0:1 is up, line protocol is up
> > Hardware is GT96K Serial
> > Description:
> > MTU 1500 bytes, BW 2048 Kbit/sec, DLY 20000 usec,
> > reliability 255/255, txload 73/255, rxload 125/255
> > Encapsulation PPP, LCP Open, multilink Open
> > Link is a member of Multilink bundle Multilink2, loopback not set
> > Keepalive set (10 sec)
> > Last input 00:00:00, output 00:00:00, output hang never
> > Last clearing of "show interface" counters 14:35:50
> > Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 331
> > Queueing strategy: weighted fair [suspended, using FIFO]
> > FIFO output queue 2/40, 331 drops
> > 5 minute input rate 1008000 bits/sec, 690 packets/sec
> > 5 minute output rate 590000 bits/sec, 562 packets/sec
> > 16762470 packets input, 3263085594 bytes, 0 no buffer
> > Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
> > 114 input errors, 98 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
> > 12888564 packets output, 1514228209 bytes, 0 underruns
> > 0 output errors, 0 collisions, 4294967292 interface resets
> > 0 unknown protocol drops
> > 0 output buffer failures, 0 output buffers swapped out
> > 8 carrier transitions
> > Timeslot(s) Used:1-31, SCC: 0, Transmitter delay is 0 flags
> >
> >
> >
> > Router#sh ver
> > Cisco IOS Software, 3800 Software (C3845-ADVIPSERVICESK9-M), Version
> > 12.4(25), R
> > ELEASE SOFTWARE (fc2)
> >
> > Eniola
>
>
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Received on Sun Apr 17 2011 - 19:55:19 ART