When a gatekeeper cluster is deployed, how does a gatekeeper in the cluster indicate to a gateway that it should register with an alternate gatekeeper?
A.
It sends an ARJ or RRJ message containing instructions to use the first member of the alternate gatekeeper list provided by the gatekeeper.
B.
It sends an ARJ or RRJ message containing the IP address of the alternate gatekeeper that the gateway should attempt to register with to complete the call.
C.
It sends an ARJ or RRJ message accompanied by an ordered list of alternate gatekeepers the gateway should attempt to register with.
D.
It sends an ARJ or RRJ, which triggers the automatic re-registration of the gateway with the first gatekeeper in the alternate gatekeeper list.