Method for establishing restricted broadcast groups in a switche

Details Method for establishing restricted broadcast groups in a switche Method for establishing restricted broadcast groups in a switche

1995-11-15

1997-11-04

Olms, Douglas W.

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370432, 370469, H04L 1266

Patent

active

056848005

ABSTRACT:
Method and apparatus for establishing restricted broadcast groups in a switched network. The method assigns different virtual LAN identifiers (VLAN-IDs) to different subsets of associated end systems or access ports. Tables are maintained for mapping the VLAN-IDs with associated end systems and access ports. When a broadcast packet is received at a first switch, it is encapsulated with a VLAN header, including the VLAN-IDs, and sent out a multicast channel to all other switches in the network (domain). The original packet is sent out the other access ports of the receiving switch for the designated VLAN-IDs. The switches receiving the VLAN packet remove the header and send the original packet out access ports associated with the VLAN-IDs extracted from the header. The method provides a mechanism for forwarding broadcast packets of a protocol not supported by the switching mechanism, as well as multicast packets and unicast packets from undiscovered end systems.

REFERENCES:
patent: 4823338 (1989-04-01), Chan et al.
patent: 5140585 (1992-08-01), Tomikawa
patent: 5208811 (1993-05-01), Kashio et al.
patent: 5394402 (1995-02-01), Ross
patent: 5444702 (1995-08-01), Burnett et al.
patent: 5485455 (1996-01-01), Dobbins et al.

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