HP procurve switch xl modules, Руководство по установке

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30
HP ProCurve Switch xl Modules
Troubleshooting
➏
The network
connection is not
working properly. Try the following procedures:
• For the indicated port, verify both ends of the cabling, at the switch and
the connected device, are securely connected.
• Verify the connected device and switch are both powered on and
operating correctly.
• Verify you have used the correct cable type for the connection. See
“Cables” on
page 33
for the correct cable specifications.
– for any of the twisted-pair connections, in the default configuration
(Auto), either a straight-through or a crossover cable can be used and
the switch will automatically adjust its operation. See the “Automatic
Cable Sensing” description on
page 20
for more information.
Note: If the module configuration is changed to one of the fixed
configuration options though (for example, 100-Full Duplex),
then the port operates as MDI-X only and the correct type of
cable must be used. In general, for connecting to an end node
(MDI port), use straight- through cable; for connecting to MDI-
X ports on hubs or other switches, use crossover cable.
– For a 1000 Mbps connection on twisted-pair cable, verify the network
cabling complies with the IEEE 802.3ab standard. The cable should
be installed according to the ANSI/TIA/EIA-568-A-5 specifications.
Cable testing should comply with the stated limitations for
Attenuation, Near-End Crosstalk, Far-End Crosstalk, Equal-Level
Far-End Crosstalk (ELFEXT), Multiple Disturber ELFEXT, and
Return Loss.
The cable verification must include all patch cables from any end
devices, including the switch, to any patch panels in the cabling path.
– for fiber-optic connections, verify the transmit port on the switch is
connected to the receive port on the connected device, and the switch
receive port is connected to the transmit port on the connected
device. Also verify that the cables comply with the specifications
shown on
page 34
.
• Verify the port has not been disabled through a switch configuration
change.
You can use the console interface, or, if you have configured an IP
address on the switch, use the web browser interface, or ProCurve
Manager network management software to determine the state of the
port and re-enable the port if necessary.
• Verify the switch port configuration matches the configuration of the
connected device. For example, if the switch port is configured as
“Auto”, the port on the connected device also MUST be configured as
“Auto”. If the configurations don’t match, the results could be a very
unreliable connection or no link at all.
• If the other procedures don’t resolve the problem, try using a different
port or a different cable.
Tip
Number Problem Solution