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Date:      Thu, 17 Feb 2000 16:22:43 -0500
From:      Mitch Collinsworth <mkc@Graphics.Cornell.EDU>
To:        Bill Sanborn <wsanborn@uswest.net>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: Interesting network situation. Owners of Linksys hubs may want to read 
Message-ID:  <200002172122.QAA76858@benge.graphics.cornell.edu>
In-Reply-To: Message from Bill Sanborn <wsanborn@uswest.net>  of "Thu, 17 Feb 2000 12:36:47 PST." <38AC5BDF.62B19D34@uswest.net> 

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>    What would be specific to FreeBSD that would cause the hub to go
>ick? The MTU is set to 1500 on both stations, and only TCP/IP is running
>on the OSR2 PC. The hub also verifies that both PCs have negotiated
>100Mb connections. I've forced the xl0 device to a 100baseTX connection,
>so I don't think it is autonegotiating itself to death. Another oddity
>is that when I'm transferring files from FBSD to the Windows station,
>using the hub, the collision light goes berserk. This seems like cruddy
>firmware to me.
>
>    If anyone has any ideas I would be really interested in reading
>them.

If I were to guess I'd say your NIC is getting set to full duplex.
Hubs are half-duplex only.  (You can't do full-duplex in a collision
domain.)

-Mitch


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