The relationships between a PIM routing table, a multicast routing table, and a multicast forwarding table are as follows:

•  A PIM routing table contains entries generated by PIM. You can view source and group information learned by PIM in a PIM routing table.

•  A multicast routing table is used to associate the protocol layer with the MFIB module. Entries at the protocol layer are stored in the multicast routing table before being delivered. Entries stored in the MFIB module must be the same with those stored in the multicast routing table.

•  A multicast forwarding table contains entries that are stored in the MFIB module. The MFIB module stores forwarding entries delivered from the protocol layer in the multicast forwarding table. The forwarding entries are then delivered to the multicast module of a device. Normally, entries stored in the multicast forwarding table must be the same with those stored in the multicast routing table.

Good information