A customer reports that a 10-Gb interface between a Cisco 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.
LACP

B.
DAI

C.
GOLD

D.
CDP

E.
UDLD