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

1997-10-30

1999-08-31

Nguyen, Chau

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370401, 370469, H04L 1266

Patent

active

059463082

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.

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