Which action is needed lo ensure that the EoIP tunnel remains in an (JP slate in the event of failover on the SSO duster?

A customer has a pair of Cisco 5520 WLCs set up in an SSO cluster to manage all APs. Guest traffic is anchored to a Cisco 3504 WLC located in a DMZ.

Which action is needed lo ensure that the EoIP tunnel remains in an (JP slate in the event of failover on the SSO duster?
A . Enable default gateway reachability check.
B . Configure back-lo-badt connectivity on the RP ports.
C . Use the same mobility domain on all WLCs.
D . Use the mobility MAC when the mobility peer is configured

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Answer: C