Which CLI command does an engineer use to validate that the redundancy peer of a Stateful Switchover pair of controllers is up and connected?

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1. The answer is A.
   A – https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-0/HA_SSO_DG/High_Availability_DG.html
   “The rping utility was added in WLC 8.0 code, which is helpful for verifying redundancy link status.”
   https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-8/config-guide/b_cg88/high_availability.html
   Procedure
   • If the HA pair does not come up, check the link encryption setting on both controllers.
   • Both the controllers must have same link encryption setting.
   • Check IPsec status on both controllers to check which link is broken RP or RMI.
   • Perform rping on both controllers to check if the peer is reachable.
   • Check the link encryption status by entering this command: show redundancy summary
   • Check the IPsec status between the HA pair by entering this command: show ipsec status
   • Enable IPsec debug messages and reboot the peer secondary controller by entering this command: debug ipsec events enable
   Not B – “Ensure that the Redundant Management Interface IP address of one controller is the same as the Redundant Management Interface IP address of the peer controller.” Can’t use ping if both ends has the same IP address.
   https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-8/config-guide/b_cg88/high_availability.html#task_1B7B731B1622450B9028D38956C32BAF

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2. The rping utility was added in WLC 8.0 code, which is helpful for verifying redundancy link status.

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