System using different tag protocol identifiers to distinguish between multiple virtual local area networks
US6430621B1 · kind B1 · utility
84Cited by
3References
18Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 29, 1998 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Dec 29, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/467
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.