You can set Flussonic Media Server peer:
# Global settings http 8080; cluster_key somekey; peer peer.example.com;
You need to set same
cluster_key on all cluster hosts.
You can set multiple peers:
# Global settings http 8080; cluster_key somekey; peer peer1.example.com; peer peer2.example.com; peer peer3.example.com;
All peers can have different streams, Flussonic Media Server will route clients to proper peers.
It is a very important difference between peer and source, because source is designed for moving data via a dedicated channel from origin to edge.
Peering is designed for situations when client can take video stream from any server in a group, so servers (peers) in a group talk to each other and tell what streams do they have.
When client connects via HLS, HTTP MPEG-TS, RTSP, RTMP or opens embed.html to any of servers in a group, it may redirect to another server where this stream is really located.