Re: Jumbo Frames?
On Tue, Jan 31, 2006 at 03:53:04PM +0000, Adam Stiles wrote:
> On Tuesday 31 Jan 2006 15:51, Chaim Keren Tzion wrote:
> > I don't know this switch but why does g19 have Mode "On" and g21 have
> > Mode "Off"?
> > Also, why not try making the Mdix type the same?
>
> The difference between MDI and MDI-X is in the port wiring; one of them has
> the transmit and receive lines swapped over. You need a straight-through
> cable to go from MDI to MDI-X, or a crossover {pin 1 swapped with pin 3 and
> pin 2 swapped with pin 6} to go from either type to the same type.
>
> Much modern kit seems to be capable of auto-sensing which is which.
Ur, you cannot use a crossover cable with gigabit+. It has to be an
8 wire cable of type "straight thru" which is the standard twisted
pair wire. Make sure your cable, if you didn't make it yourself,
has all 8 wires (the spec for 100BT is really only 4 wires, but most
cables have 8 hooked up) and that it's not a crossover. Example: to
connect two gigabit interfaces together, use a straight through cable.
To connect a gigabit interface to a switch, use a straight through cable.
Makes it easy, right? ~:^)
Some uber smart switches will detect a crossover cable, drop the
interface to 100BT and fix up the wiring auto-sensibly, but mine
certainly doesn't do that.
Cheers,
a
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