System using different tag protocol identifiers to distinguish between multiple virtual local area networks
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United States of America Patent
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Aug 6, 2002
Grant Date -
N/A
app pub date -
Dec 29, 1998
filing date -
Dec 29, 1998
priority date (Note) -
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Abstract
A method and apparatus that provides for grouping nodes in multiple VLANs using port based VLAN grouping, and explicitly associates one of multiple VLANs with a packet transmitted by the nodes, using IEEE 802.1Q based frame tagging. A switch receives an untagged packet, filters the packet, and based on the contents of the packet, inserts a tag header with a common VLAN identifier and a unique tag protocol identifier (TPID).
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