Chapter 11
| Interface Commands
Cable Diagnostics
– 375 –
Example
Console#test cable-diagnostics interface ethernet 1/24
Console#
show
cable-diagnostics
This command shows the results of a cable diagnostics test.
Syntax
show cable-diagnostics dsp interface
[interface]
interface
ethernet
unit/port
unit - Unit identifier. (Range: 1)
port - Port number. (Range: 1-8/24)
Command Mode
Privileged Exec
Command Usage
â—†
The results include common cable failures, as well as the status and
approximate distance to a fault, or the approximate cable length if no fault is
found.
â—†
For link-down ports, the reported distance to a fault is accurate to within +/- 2
meters. For link-up ports, the accuracy is +/- 10 meters.
â—†
Potential conditions which may be listed by the diagnostics are shown by the
legend in the following example. Additional information is provided for the
following test results.
â–
OK: Correctly terminated pair
â–
ON: Open pair, no link partner
â–
IE (Impedance mismatch): Terminating impedance is not in the reference
range.
â–
NS (Not Supported): This message is displayed for any Gigabit Ethernet
ports linked up at a speed lower than 1000 Mbps.
â–
UN: Unknown Error
Example
Console#show cable-diagnostics interface ethernet 1/24
Cable Diagnostics on interface Ethernet 1/1:
Cable Open with accuracy 0 meters.
Pair A Open, length 2 meters
Pair B Open, length 2 meters
Pair C Short, length 0 meters
Pair D Short, length 0 meters
Last Update 0n 2011-02-16 02:32:56
Console#
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