Serial interface errors

[bookworm]

Has anyone come across this problem before ?

I have a 3640 going over a 2meg line to a 7513. The link uses HDLC. On the 3640 interface I'm seeing crc errors and aborts, while on the 7513 interface the only counters incrementing is the 'output buffers swapped out' counter, (cisco web site has no reference to the counter).

I've carried out extended pings between the interfaces with various datagram sizes and test patterns but cann't see any CRC errors or timeouts. I've also pinged from the 7513 interface to a loopback. same again no crc errors. The telco have tested the link and see no problems!!!

I'm struck, can any one help???

Bookee,
Happy Christmas and a Festive New Year to all.

3640 interface -
603 CRC, 794 frame, 0 overrun, 0 ignored, 338 abort
Input queue:0/75/0/0 (size/max/drops/flushes)output drops: 0
Output queue: 0/1000/64/0 (size/max total/threshold/drops)

On the 7513 interface -
13 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 output buffer failures, 330 output buffers swapped out

 

[bookworm]

Also, i only have access to the 3640 via telnet and would like to debug interface, but as I understand it, the debug command may affect the 3640's performance.

 

[ChrisAC]

Debugging may have a slight impact on performance but should be okay for testing! Just remember to take all debugging off when you are done!

Chris.
************************
Chris Andrew, CCNA
chrisac@gmx.co.uk
************************

 

[wybnormal]

Are the CRCs size dependent? in other words, did you use extended ping and adjust the payload size? what about patterns? if you send all ones, do you get a ton of errors? nothing? When you say you are using HDLC, is this a hard line so you are literially using HDLC only like in a test lab or are running some other protocol over the top of it?

As far as the debug goes, if you stay away from debug all packets, you should be alright.. debug on serial events for example may give some useful info.

MikeS
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http://www.packetattack.com

"The trouble with giving up civil rights is that you never get them back"

 

[BOJIKA]

are you using modems for connect routers?