Cisco CATALYST 2960

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Catalyst 2960 Switch Command Reference
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Chapter 2 Catalyst 2960 Switch Cisco IOS Commands
show cable-diagnostics tdr
This is an example of output from the show interface interface-id command when TDR is running:
Switch# show interface gigabitethernet0/2
gigabitethernet0/2 is up, line protocol is up (connected: TDR in Progress)
This is an example of output from the show cable-diagnostics tdr interface interface-id command when
TDR is not running:
Switch# show cable-diagnostics tdr interface gigabitethernet0/2
% TDR test was never issued on Gi0/2
If an interface does not support TDR, this message appears:
% TDR test is not supported on switch 1
Related Commands
Pair length Location on the cable where the problem is, with respect to your switch. TDR can
only find the location in one of these cases:
• The cable is properly connected, the link is up, and the interface speed is
1000 Mbps.
• The cable is open.
• The cable has a short.
Remote pair Name of the pair of wires to which the local pair is connected. TDR can learn about
the remote pair only when the cable is properly connected and the link is up.
Pair status The status of the pair of wires on which TDR is running:
• Normal—The pair of wires is properly connected.
• Not completed—The test is running and is not completed.
• Not supported—The interface does not support TDR.
• Open—The pair of wires is open.
• Shorted—The pair of wires is shorted.
Table 2-17 Fields Descriptions for the show cable-diagnostics tdr Command Output (continued)
Field Description
Command Description
test cable-diagnostics tdr Enables and runs TDR on an interface.