Note that some production environments do not support multicast. However, if your environment supports multicast, there are no issues in using this as your membership scheme.
The Well-Known Addresses (WKA) feature is a mechanism that allows cluster members to discover and join a cluster using unicast instead of multicast. WKA is enabled by specifying a small subset of cluster members (referred to as WKA members) that are able to start a cluster. The WKA member starts the cluster and the other members join the cluster through this WKA member. When the WKA member is down, the cluster breaks, and the members cannot communicate with each other.
The system should have at least two well-known address (WKA) members in order to work correctly and to recover if a single WKA member fails.