On 25 Feb 1999, Ben Gertzfield wrote:
> I ran into something suspiciously similar to this today; the tulip.c
> driver (version 0.90) in 100BaseT full-duplex mode would often deal
> extremely poorly with the collisions that full-duplex mode brings
> about. I would get runts, giants, and all sorts of nasty packet errors.
Ackkk!
Full duplex mode never has collisions.
You were likely trying to use full duplex mode on a CSMA/CD Ethernet.
Full duplex can only be used on host-to-host and host-to-switch links, and
only when both endpoints are configured or negotiate full duplex.
Full duplex can never be used when there is a repeater (aka hub) in the
network. Spank yourself if you configured FDX in that case.
> Forcing half-duplex mode solved the problem. I don't know if it's
> a driver or hardware problem at this point, but I've never had
> luck with any DEC-related ethernet cards. :)
Donald Becker [EMAIL PROTECTED]
USRA-CESDIS, Center of Excellence in Space Data and Information Sciences.
Code 930.5, Goddard Space Flight Center, Greenbelt, MD. 20771
301-286-0882 http://cesdis.gsfc.nasa.gov/people/becker/whoiam.html
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