That MDI/MDI-X switch is usually just for one port (port 1 for example) as
an uplink. I know Synoptics hubs are like this. So... flipping the switch
would only work if you are plugged into the proper port. If he WAS in the
proper port, it doesn't make sense to me either.
Roman
>From: "Kevin Wigle" <[EMAIL PROTECTED]>
>To: "'Bradley J. Wilson'" <[EMAIL PROTECTED]>,
> "cisco" <[EMAIL PROTECTED]>
>Subject: Re: Hub-to-Switch connection problem
>Date: Fri, 1 Dec 2000 11:51:06 -0500
>X-Mailer: Microsoft Outlook Express 5.50.4133.2400
>Sender: [EMAIL PROTECTED]
>Reply-To: "Kevin Wigle" <[EMAIL PROTECTED]>
>
>I'm wondering why the MDI/MDI-X switch did not help.
>
>At any time using this switch did you see a link light on the eqpt? no
>link - flip the switch, also no light? - check the cable. (however a x-over
>cable and engaged MDI-X would be straight through :-))))
>
>I have used all manner of eqpt and the MDI/MDI-X worked as expected, just
>like uplink ports, etc.
>
>Kevin Wigle
>
>----- Original Message -----
>From: "Mayo Joseph W CONT NSSG" <[EMAIL PROTECTED]>
>To: "'Bradley J. Wilson'" <[EMAIL PROTECTED]>; "cisco"
><[EMAIL PROTECTED]>
>Sent: Friday, December 01, 2000 9:16 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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