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HP ProCurve Switch xl Modules
Installing the Modules
N o t e
20
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.
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