Method and apparatus for VLAN support

Details Method and apparatus for VLAN support Method and apparatus for VLAN support

1997-09-11

1999-11-02

Patel, Ajit

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370402, H04L 1228

Patent

active

059783788

ABSTRACT:
Logic circuits are employed in a telecommunications bridge/router device to examine a received frame to determine which VLAN, if any, the frame is associated with. The protocol type, receive port identification, and receive VLAN tag are employed to determine the transmit port identification and transmit VLAN tag. A predefined table indicates which ports within the bridge/router are associated with the VLAN. The frame is excluded from transmission through the ports that are not associated with members of the respective the VLAN.

REFERENCES:
patent: 4933937 (1990-06-01), Konishi
patent: 5140585 (1992-08-01), Tomikawa
patent: 5394402 (1995-02-01), Ross
patent: 5450407 (1995-09-01), Perlman
patent: 5684800 (1997-11-01), Dobbins
patent: 5742604 (1998-04-01), Edsall

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