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RE: Weird networking issue.

  • From: Braun, Mike
  • Date: Tue Jan 07 17:27:01 2003

I think we all agree that autonegotiation is evil, and should be avoided
whenever possible.  When you are looking for the root cause of the errors on
your 3660, look at the speed and duplex settings for each device connecting
to the etherstack hub.  If one of those is miss-configured or possibly has a
failing NIC, bad packets will be transmitted out all ports on the hub and
will show up in the "show int f0/0" output on your router.  

Mike Braun

-----Original Message-----
From: Peter E. Fry [mailto:pfry@swbell.net]
Sent: Tuesday, January 07, 2003 1:18 PM
To: nanog@merit.edu
Subject: Re: Weird networking issue.



"David G. Andersen" wrote:
> 
> Rule number 1 with any ethernet:  Check to make sure you have the duplex
> and rate statically configured, and configured identically on both ends of
> the connection. [...]

  I'd like to thank Cisco for this piece of advice, as the only company
incapable of manufacturing Ethernet equipment capable of
autonegotiation.  At least until 1999 or so.
  Yeah, there're a few others, all of which seemed to follow Cisco's
lead.  Nutty.

Peter E. Fry

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