Method and apparatus for VLAN support
US5978378A · kind A · utility
78Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1997 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Sep 11, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/4645
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.