3-layer VPN and constructing method thereof
US7411955B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2003 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Feb 20, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A 3-layer Virtual Private Network (VPN) is disclosed and includes P devices and PE devices in the backbone network, a plurality of sites and CE devices in subscribers' VPNs, and Hierarchy of PE (HoPE) devices, the HoPE devices serve as edge routers in the backbone network and are connected to P devices in the backbone network as well as sites and CE devices in subscribers' VPNs; the HoPE devices include understratum PEs (UPEs), zero or more middle-level PEs (MPEs) and superior PEs (SPEs) connected with each other, and all of the PEs (UPEs, MPEs, and SPEs) take different roles and deliver the function of a central PE. For the SPEs, the routing and forwarding performance should be relatively higher; while for UPEs, the performance may be lower. The architecture can enhance the expandability in hierarchical BGP/MPLS VPNs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.