duplex mismatch problem

Unanswered Question
Oct 19th, 2009
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I have connectivity like this:

customer switch forced to 100Mbps/Full duplex----------My end ME-3400-24TS-D configured for Auto negotiation.

ME-3400 negotiating with 100Mbps/Half duplex.

Customer facing CRC. Forced ME-3400 to 100Mbps/Full duplex, but link is not coming up.

ME-3400 IOS is me340x-metroaccess-mz.122-44.SE.bin

Is it bug related issue?



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sjamison76 Wed, 10/21/2009 - 07:56
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Have had the same problem. Make sure you both force the link to the speed/duplex you want.

If you still have CRC issues on the line, usually its a cable issue. You can use the following command to test the cable.

This does take the port down when you do this for a few seconds:

'test cable-diag tdr int xx/xx'

'show cable-diag tdr' for results

sivakondalarao Thu, 10/22/2009 - 09:29
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After forcing both ends to 100Mbps/Full Duplex, link is showing down.



summerd Tue, 12/08/2009 - 06:00
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Were you able to fix this issue so that both sides could be hard-coded to full duplex? I'm having the same problem...

Did you try the cable commands to make sure the cable wasn't the problem?

skrao_mandalapu Wed, 12/30/2009 - 03:55
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Hi SummerD,

No, we didn't check the cable. It is customer connectivity issue with us. I don't know how that ticket is closed.


Siva K

jdcardenas Wed, 03/17/2010 - 09:41
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Hi guys,

I´ve been having the same problem whe trying to bring up a link between a gigabitethernet port using the UTP connector and a fastethernet port on a Huawei SW...the only way it works in full duplex /100 is when both sides are auto.

any idea whats the cause of this behavior?

summerd Wed, 03/17/2010 - 09:47
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My situation ended up being the wrong cable, layer 1- easy fix


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