Overview
The following tables are involved in multicast routing and forwarding:
Multicast routing table of each multicast routing protocol, such as the PIM routing table.
General multicast routing table that summarizes multicast routing information generated by different multicast routing protocols. The multicast routing information from multicast sources to multicast groups are stored in a set of (S, G) routing entries.
Multicast forwarding table that guides multicast forwarding. The optimal routing entries in the multicast routing table are added to the multicast forwarding table.
The term "interface" in this chapter collectively refers to VLAN interfaces and Layer 3 Ethernet interfaces. You can set an Ethernet port as a Layer 3 interface by using the port link-mode route command (see Layer 2—LAN Switching Configuration Guide).