Installation Guide HP Procurve Switch xl Modules

10
HP Procurve Switch XL Modules
Installing the Modules
Note Automatic Twisted-Pair Cable Sensing:
When the ports for the 10/100-TX XL Module and the 100/1000-T XL Module
are in their default configuration,
Auto, both modules 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 XL Module, this feature is identified as HP Auto-MDIX; on
the 100/1000-T XL Module, 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 feature depends on the port configurations being kept at
Auto. If the configuration is changed to one of the available fixed options
though (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.
Module Cable Type Maximum Length
mini-GBIC XL Module
Gigabit-SX operation:
multimode fiber-optic
cables fitted with LC
connectors
220 meters to 550 meters,
depending on the cable
used. See “Fiber-Optic
Cables” on page 21 for
more information.
Gigabit-LX operation:
single-mode fiber-
optic cables fitted with
LC connectors.
multimode fiber-optic
cables may also be
used—see “Fiber-
Optic Cables” on page
21.
• single-mode cable: 10
kilometers
• multimode cable: 550
meters
hp procurve
mini-GBIC
xl module
J4878A
4321
Mode
Link
1
Mode
Link
1
2
3
4
xl
module
A
B
Gigabit-SX or Gigabit-LX
mini-GBICs
fiber-optic cable
with
LC connector
Alp3_mod.book Page 10 Tuesday, April 2, 2002 2:40 PM