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What causes Late colllision errors?

I have one site with 8 3640 routers connected to catalyst 3524, almost all of them are getting late collision errors. I looked on Cisco's site and it said possible causes are bad NIC, wrong number of hubs, or bad cabling. I seriously doubt any of these are the problems. Is there anything else it could be? Has anybody else run across this problem? Thanks in advance.

Jpoulos

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New Member

Re: What causes Late colllision errors?

The one thing that you left out of this list is duplex mismatch. More often than not, late collisions are caused by one side being set to full duplex and the other to half. Or, one side set to full and the other to auto causing the auto to negotiate improperly to half.

Check your duplex setting. You should also be getting CRC errors on the interface that is set to full.

Mick.

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