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Cisco Bug: CSCte43869 - Cable diags sometimes report length as N/A when a device is connected

Last Modified

Feb 24, 2018

Products (1)

  • Cisco Catalyst 3750-X Series Switches

Known Affected Releases

12.2(300.0.48)INC 12.2(300.0.59)SE unknown

Description (partial)

The commands test cable-diagnostics tdr interface and show cable-diagnostics tdr interface are issued for a given interface to determine the length of a connected cable. When a device is connected to the far end of the cable, the cable length is sometimes reported as N/A.

The cable has no cable faults, and a device is connected to the far end of the cable. When there is either no link, a 10 Mbps link, or a 100 Mbps link, cable length is reported as N/A. Cable length is reported correctly when a 1 Gbps link is active on the interface.
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