Use the cable-diagnostic feature to test cables in the event where there might be a bad copper cable.
NOTE
This feature is only available on non-SFP copper ports.
Enter diagnostics
to open up the diagnostics menu:
diagnostics
Once done, the diagnostics command set is now available for use, and the cable-diagnostics command can be executed:
diag cable-diagnostic <IFACE>
diagnostics <CR>
diag ?
asic ASIC diagnostics
audit-failure-notification Configure audit failure notification
bgp IP information
cable-diagnostic Cable diagnostic test
...snip for brevity
diag cable-diagnostic ?
IFNAME