Note
This procedure does not apply to 7720 Series. For model support, see Fabric Engine and VOSS Feature Matrix.Perform this procedure to initiate a Time Domain Reflectometer (TDR) test to detect defects on Ethernet cables or to determine the status and length of the cable pairs attached to copper ports on the switch. Use this functionality to diagnose a link with poor connectivity.
TDR cable diagnostic operates on administratively enabled ports only. You cannot initiate a TDR test on a port with Auto-Negotiation disabled.