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udld port

if you want to use udld on copper ports, udld aggressive is your
only option.

Notes:
If you use udld enable global config this will enable udld for fibre ports
only
If you use udld aggregssive global config command this will enable
aggressive udld for fibre ports but won't enable udld on copper ports.
To enable udld for copper ports, you manually need to go onto that port and
enable using 'udld aggress'.
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