Member servers in a group may also communicate ballots to one another via IGMP multicast. Recall that the election system used by Instant Connect servers does not function like normal democratic elections and allows the same ballot to be 'counted' multiple times without affecting election outcome. This makes it possible to send and receive ballots over both Rallypoint-connected data-only channels and IGMP multicast at the same time.

The administrator can choose the multicast group address and port to use for each group’s election system. Note, however, that only externally deployed servers can communicate via multicast ('internal' servers running inside the ICE Server Kubernetes cluster cannot utilize multicast for election). Further, be aware that multicast election must be enabled when deploying the server by supplying the '--default-nic' argument to the ICE Agent command. This argument expects the name of a valid network interface on the host system that will be used when attempting to join the multicast group. For example, 'agent --default-nic eth0 external patch'.