[c-nsp] autonegotiating hub was: Deferred packets on 2950 10/full interface

[Gert Doering]

Hi,

On Sat, Jan 15, 2005 at 07:16:13AM -0500, lee.e.rian at census.gov wrote:
> > > was non autonegotiating.  This caused problems with many
> autonegotiating
> > > hubs as the card had problems figuring out if something was
> > Speaking of atrocity, what is an "autonegotiating hub"?
> Anything marketed as a dual-speed or 10/100 hub.

These were actually two separate hubs (and as such: half-duplex only) 
with a bridge in between - with the ports being switched to one hub or
the other, depending on the link speed.

Link speed negotiaton and half-duplex/full-duplex negotiation are two
completely different pair of shoes.

Hubs will NEVER do full-duplex - it's impossible by design.  Think what
happens if two stations send simultaneously.

[..]
> Cheap combination of both - they act like there's an internal 2 port switch
> for switching traffic between the 10Mb hub ports and the 100Mb hub ports.

Exactly.  But each of the hubs is a hub is a hub.

gert

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Gert Doering - Munich, Germany                             gert at greenie.muc.de
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