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Date: Fri, 13 Jun 2008 22:41:37 -0700
From: Rudy <crapsh@monkeybrains.net>
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Subject: Re: em0: watchdog timeout -- resetting
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> Just saw the "watchdog" error using an Intel Pro Quad PT card...

more info: doing about 100Mbps plugged into a Cisco 2960:
  Gi0/23    mango-em2          connected     a-full a-1000 10/100/1000BaseTX

Would setting the duplex and speed manually (instead of using auto-negotionation) help prevent the 
watchdog timer?

What is the watchdog timeout for?  Does the driver catch stalled interface conditions?

Rudy