Specifications

Cable Fault Locator Introduction
New and Enhanced Features in AlliedWare Plus 5.4.4 Major and Minor Versions 77
Using the Cable Fault Locator
To run a CFL diagnostics test, use the command, “test cable-diagnostics tdr interface”
on page 82. This will return a prompt asking you to confirm whether or not you want to
continue with the test. This confirmation prompt is generated because the link is unable
to carry data during the test, typically taking between 1 and 2 seconds to complete.
Example To run a CFL test on the cable inserted into port 1.0.1 use the following command:
Once the cable test has run you can display its results by running the show test cable-
diagnostics tdr command on page 81.
Output Figure 1: Example output from the show test cable-diagnostics tdr command
From the monitoring tests described, the CFL presents cable termination status
information as shown, together with explanations, in Table 1.
Table 1: Cable Status Table
awplus#
test cable-diagnostics tdr interface
port1.0.1
This command returns the following message:
Link will go down while test is in progress. Continue? (y/n):
Select y to continue.
awplus#
y
Answering y returns the following message:
Test started. This will take several seconds to complete. Use
"show test cable-diagnostics tdr" to print results.
Port Pair Length Status
------------------------------------------
1.0.1 A - OK
B - OK
C 5 +/- 5 m Open
Status Definition
OK The pair is good and is terminated.
Open The pair is not terminated.
Short (within-pair) There is a short between the two wires of the
pair.
Short (cross-pair) There is a short between wires of different pairs.
Error The test was unable to get a result. This error
condition may occur when connecting to
remote devices that issue idle traffic data when
operating in the 10/100 M mode.