ECS4110-28T_Management Guide

C HAPTER 27 | Interface Commands
Cable Diagnostics
– 1018 –
◆ This cable test is only accurate for Gigabit Ethernet cables 7 - 100
meters long.
◆ The test takes approximately 5 seconds. The switch displays the results
of the test immediately upon completion, including common cable
failures, as well as the status and approximate length of each cable
pair.
◆ Potential conditions which may be listed by the diagnostics include:
■
OK: Correctly terminated pair
■
Open: Open pair, no link partner
■
Short: Shorted pair
■
Not Supported: This message is displayed for Gigabit Ethernet ports
linked up at a speed lower than 1000 Mbps.
■
Impedance mismatch: Terminating impedance is not in the
reference range.
◆ Ports are linked down while running cable diagnostics.
◆ To ensure more accurate measurement of the length to a fault, first
disable power-saving mode (using the no power-save command) on the
link partner before running cable diagnostics.
EXAMPLE
Console#test cable-diagnostics interface ethernet 1/23
Console#show cable-diagnostics interface ethernet 1/23
TF: Test failed
OK: OK
ON: Open
ST: Short
IE: Impedance error
NC: No cable
NT: Not tested
NS: Not supported
UN: Unknown
Port Type Link Pair A Pair B Pair C Pair D Last
Status meters meters meters meters Updated
-------- ---- -------- -------- -------- -------- -------- ------------------
Eth 1/ 1 GE Up OK (0) OK (0) NS NS 2014-05-08 12:12:50
Console#
show cable-
diagnostics
This command shows the results of a cable diagnostics test.
SYNTAX
show cable-diagnostics interface [interface]
interface
ethernet unit/port
unit - Unit identifier. (Range: 1)
port - Port number. (Range: 1-24/48)