IP multicast forwarding in MAC bridges

Details IP multicast forwarding in MAC bridges IP multicast forwarding in MAC bridges

2011-04-26

2011-04-26

Moore, Jr., Michael J (Department: 2467)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S245000, C370S260000, C370S338000, C370S356000, C370S401000, C709S206000, C709S220000, C709S227000, C709S237000

Reexamination Certificate

active

07933268

ABSTRACT:
The invention provides novel methods of forwarding multicast data packets to selected egress ports in a MAC bridging environment. A multicast data packet is received via an ingress port. A source IP address and a destination multicast IP address are retrieved from the multicast packet. In a forwarding database, different groups of egress ports correspond to different combinations of a source address, a destination multicast address, and a virtual local area network identifier (VLAN-ID). The forwarding database is accessed, based on the retrieved source address, the retrieved destination multicast address, and a VLAN-ID, to thereby determine a corresponding group of egress ports. The multicast packet is then forwarded to the corresponding group of egress ports.

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