A customer reports that a 10-Gb interface between aCisco Nexus 7009 Switch and a
Cisco Nexus 5548UP Switch is not passing traffic. The Nexus 7009 interface indicates
up/up. The Nexus 5548UP interface indicates up/down. Which feature should you enable to
help isolate the root cause?

A.
CDP

B.
GOLD

C.
UDLD

D.
DAI

E.
LACP