Communications system, and sending device, in a communication network offering both layer-2 and layer-3 virtual private network services
US7203762B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2002 |
| Grant date | Apr 10, 2007 |
| Priority date | — |
| Expiry date | May 7, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L49/3009
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A communications system in which both a layer-2 and layer-3 virtual private networks (VPNS) can operate in an efficient and cost-effective way to offer improved network services. An ingress edge node has a path data manager which sets and manages path data describing configuration of an intra-network transport path. For transport over the intra-network transport path, a labeling unit adds an intra-network transport label to each outgoing frame, based on the path data. Those frames also have a VPN label for transport over an end-to-end VPN path. In an egress edge node, a frame discrimination value setting unit gives a frame discrimination value for identifying to which VPN each received frame belongs. A redirection processor redirects the received frames to their destinations according to their VPN labels and frame discrimination value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.