Extreme Networks ExtremeWare 7.7, Command Reference Manual

Page: 1276 / 2620

1276 ExtremeWare 7.7 Command Reference Guide
Troubleshooting Commands
show ports cable diagnostics
For BlackDiamond switches:
show ports <portlist> stat cable-diagnostics
For Summit switches:
show ports stat cable diagnostics
Description
Displays the results of the last
run cable diagnostics
ports command.
NOTE
This command is available only on the “i” series switches.
Default
N/A
Syntax Description
Usage Guidelines
The results of the command display in tabular format:
Port —The port number tested
Pair —Each Ethernet cable is comprised of four copper pairs of Unshielded Twisted-Pair (UTP). To have
a successful link, two of the four cables must have a status of Terminated and even lengths. The pairs are
labeled A through D. The output shows the test results of each pair.
Length —The length of the cable. All pairs should have the same length. An uneven length can indicate
a kink in the cable, or a broken connection.
Status —The result of the test. The status of Terminated indicates a successful completion. The status of
Open or Short indicates a failure in the cable.
Examples
The following example tests the Ethernet cable inserted into port 1:
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
portlist Shows cable diagnostics for one or more port numbers.