Re: 8139 full duplex?

From: James Sutherland (jas88@cam.ac.uk)
Date: Fri Feb 16 2001 - 04:32:34 EST


On Fri, 16 Feb 2001, Rogier Wolff wrote:

>
> Hi All,
>
> I have a bunch of computers with 8139 cards. When I moved the cables
> over from my hub to my new switch all the "full duplex" lights came on
> immediately.

That's what you would expect: they will auto-negotiate full duplex, in the
same way they would negotiate 10 or 100 Mbit/sec.

> Would this mean that the driver/card already were in full-duplex?

No, that's not possible. They just automatically configured for the
best performance available - in this case, full duplex.

> That would explain me seeing way too many collisions on that old hub
> (which obviously doesn't support full-duplex).

No, it would just prevent your card working. Large numbers of collisions
are normal during fast transfers across a hub.

James.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Fri Feb 23 2001 - 21:00:12 EST