I wasn't aware that the terms DCE and DTE applied in ethernet; I thought
they were serial communication terms. How would you apply those terms to
this situation?
> Hello,
>
> Sometimes these things happen because not all equipment have the same
specs.
> My suggestion would be to consider DTE to DTE needs at least one roll in
the
> connection, and DTE to DCE needs a straight-through or two rolls in the
> connection. It all hangs on the constuction of the interface connection
and
> which pins it is using for transmit, receive etc.
> Bottom line is try to determine which interfaces(DTE or DCE) are involved
> and then it is easier to choose the correct cable.
> Hope this helps a little.
>
> Winston.
>
> -----Original Message-----
> From: Bradley J. Wilson [mailto:[EMAIL PROTECTED]]
> Sent: Friday, December 01, 2000 1:31 PM
> 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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