Extreme Networks ExtremeWare 7.7, Command Reference Manual

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1256 ExtremeWare 7.7 Command Reference Guide
Troubleshooting Commands
run diagnostics cable ports
run diagnostics cable [ports <portlist> | all]
Description
Runs diagnostics on Ethernet cables.
NOTE
This command is available only on the Summit 400 series switches and on the G24T
3
High-Density
Gigabit Ethernet module in the BlackDiamond 6800 series switches. For more information about
commands used with the High-Density Gigabit Ethernet modules, refer to Chapter 29.
Syntax Description
Default
N/A
Usage Guidelines
This command tests each of the four unshielded twisted-pair (UTP) cables. When the test completes, the
command prompts you to enter the show port
portlist
cable diagnostics command to see the results
of the test.
By reviewing the output of the
show
command you can determine:
• The length of the cable
• Whether there is a successful termination, or whether there is an open or short
Examples
The following example tests the Ethernet cable inserted into port 1. The four copper pairs do not all
have the same length, which might indicate a kink in the cable, or a open connection:
Summit400-48t:27 # run diagnostics cable ports 1
Cable Diagnostics has completed, to view results enter
show port <port list> cable diagnostics
Summit400-48t:28 # show port 1 cable diagnostics
Port Pair Length Status
1 Pair A 3 meters Terminated
Pair B 2 meters Terminated
Pair C 1 meters Open or Short
Pair D 1 meters Open or Short
portlist Runs cable diagnostics for one or more port numbers.
all Runs cable diagnostics for all ports in the switch