show cable tdr
User EXEC mode
Most RUCKUS ICX devices support VCT technology. VCT technology enables the diagnosis of a conductor (wire or cable) by sending a pulsed signal into the conductor, then examining the reflection of that pulse. This method of cable analysis is referred to as Time Domain Reflectometry (TDR). By examining the reflection, the device can detect and report cable statistics such as local and remote link pair, cable length, and link status.
When there is crosstalk between the
ports, running VCT on the port can provide invalid results. These can be detected
by
running the show cable
tdr command, as illustrated in the following example.
The following example displays output for the
show cable tdr command.
device# show cable tdr 1/1/48
Port Speed Local pair Pair Length Remote pair Pair status
--------- -------- ------------ --------------- ------------
1/1/48 1000M Pair A Unknown Invalid
Pair B Unknown Invalid
Pair C Unknown Invalid
Pair D Unknown Invalid