ProCurve Switch xl Modules Installation Guide 2004-05

HP ProCurve Switch xl Modules

Installing the Modules

Note Automatic Cable Sensing on Twisted-Pair Ports:

When the ports for the 10/100-TX, 100/1000-T, 10/100/1000-T, and the PoE xl

Modules are in their default configuration, Auto, they automatically negotiate

whether the ports operate as MDI or MDI-X, depending on the cable type and the

connected device’s operation. As a result, you can use either straight-through or

crossover twisted-pair cable for all network connections to these modules.

On the 10/100-TX and PoE xl Modules, this feature is identified as HP Auto-MDIX;

on the 100/1000-T and the 10/100/1000-T xl Modules, it is identified as Auto MDI/

MDI-X and it is part of the IEEE 802.3ab standard. Both features operate the same.

Operation of these features depend on the port configurations being kept at Auto. If

the configuration is changed to one of the available fixed options (for example, 100-

Full Duplex), the port operates as an MDI-X port. In that case, to connect the module

to another switch or hub, use a crossover cable; to connect to an end node, use a

straight-through cable.