Apparatus for and method for supporting 802.1Q VLAN tagging with independent VLAN learning in LAN emulation networks
US6639901B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2000 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | Jan 24, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5621
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An apparatus for and a method of extending the ATM Forum LAN Emulation standard to support 802.1Q VLAN tagging with Independent VLAN Learning. A standard LEC entity is modified to perform the VLAN tagging method that supports Independent VLAN Learning. Since the LES may also respond to LE_ARP messages, it is optionally modified to perform the VLAN tagging method of the invention so as to provide support for 802.1Q Independent VLAN Learning. Support for 802.1Q Independent VLAN Learning is provided by adding a VLAN-ID TLV to LAN Emulation control messages such as LE_ARP and LE_REGISTER messages. The TLV added comprises the VLAN Tag Header information that is normally carried by the Ethernet frame in 802.1Q networks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.