A multicast domain consists of multiple multicast groups. A host that joins a multicast group becomes a member of the group and can receive multicast data sent to the multicast group.
The table below describes some basic concepts of multicast.
Name | Description |
Multicast Domain | A multicast domain defines the scope of a multicast network within a region. Only resources inside the multicast domain can send or receive multicast traffic. Resources outside the multicast domain cannot. Each VPC supports only one multicast domain. Multicast domains in the same region are isolated from each other. |
Multicast Group | In a multicast domain, a set of resources sending and receiving the same multicast packets form a multicast group. Each IP multicast address identifies a multicast group Multiple multicast groups can be created under a multicast domain, but each must have a unique IP address. Multicast groups with the same IP address can be created under different multicast domains. Traffic between different multicast groups is isolated. |
Multicast Member | Resources that receive multicast traffic under a multicast group are called multicast members. |