Just a correction for some of you. A Switch is layer 2 and a hub is layer
1
as is a repeater. I don't know where some of you are getting your info.
Hopefully you all understand that a router is layer 3.
Ron Anthony
> ----- Original Message -----
> From: "Mayo Joseph W CONT NSSG" <[EMAIL PROTECTED]>
> To: "'Bradley J. Wilson'" <[EMAIL PROTECTED]>; "cisco"
> <[EMAIL PROTECTED]>
> Sent: Friday, December 01, 2000 8:16 AM
> Subject: RE: Hub-to-Switch connection problem
>
>
> > The hub and switch are both at the same OSI layer 2. The rule is still
> > correct.
> >
> > JM
> >
> > Joseph Mayo
> > Network Engineer
> > Phone: (757) 393-9526 Fax: (757) 393-9847
> > Email: [EMAIL PROTECTED]
> >
> >
> >
> > -----Original Message-----
> > From: Bradley J. Wilson [mailto:[EMAIL PROTECTED]]
> > Sent: Friday, December 01, 2000 7:31 AM
> > To: cisco
> > Subject: Hub-to-Switch connection problem
> >
> >
> > Okay gang, I had an interesting and annoying situation yesterday
morning,
> > and I'd like to see if anyone else has had an experience like this:
> >
> > My client was installing an older BayStack 301 switch into their
existing
> > network, which consisted of a Bay Access Node router, as well as four
> > stacked SynOptics LattisHubs. The router was experiencing excessive
> > collisions, hence the installation of the switch. So we installed the
> > switch and cabled the router to it, moved all the "power users" directly
> > onto the switch, and left the other users attached to the hub. We
> attached
> > the hub to the switch via a straight-through cable.
> >
> > The users who were directly connected to the switch had no problem
> accessing
> > the network and Internet. The users on the hub were dead in the water.
> We
> > tried swapping out the cable between the hub and switch, tried plugging
> > either end into different ports, tried flipping the MDI/MDI-X switch,
and
> > nothing worked. The only thing that *did* work was using a *crossover*
> > cable between the hub and the switch.
> >
> > Now, the rule (which I gleaned from this newsgroup, btw) is that when
> you're
> > connecting devices at different OSI layers, you use a straight-through -
> > e.g. PC to hub, PC to switch, switch to router, hub to switch - that's
all
> > straight-through. You use a crossover when you're connecting devices at
> the
> > same OSI layer - router to router, switch to switch, hub to hub, PC to
PC.
> > In the situation yesterday, a straight-through seemed logical, as we
were
> > trying to connect a hub to a switch. Am I wrong here? Why did the
> > crossover work?
> >
> > Thanks,
> >
> > BJ
> >
> > P.S. sorry for the Bay-centric example...I'm trying to get them to
change
> > that. ;-)
> >
> >
> >
> >
> > _________________________________
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> >
>
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