Method for processing packets of a VLAN in a network switch
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United States of America Patent
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Feb 9, 2010
Grant Date -
Jun 7, 2007
app pub date -
Dec 1, 2005
filing date -
Dec 1, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A method for processing packets of a VLAN in a network switch is provided. The VLAN comprises a plurality of physical LANs and are divided into a plurality of subnets. The method comprises the steps of: receiving a packet through an ingress port of the network switch, wherein the packet is tagged with a VID of the VLAN; finding a VLAN member according to the VID, wherein the VLAN member represents all ports of the network switch dedicated to serving packets of the VLAN; finding a forwarding scope according to the ingress port, wherein the ingress port is one of the ports dedicated to serving packets of a first subnet of the VLAN and the forwarding scope represents all ports of the network switch dedicated to serving packets of the first subnet; and determining an egress port of the packet according to both the VLAN member and the forwarding scope.
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