Hierarchical virtual private LAN service hub connectivity failure recovery
US7969866B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2008 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Feb 27, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/4641
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques for recovering from hierarchical virtual private LAN service (HVPLS) hub connectivity failure are described herein. In one embodiment of the invention, a provider edge network element reuses an HVPLS spoke connectivity failure recovery mechanism in an MTU to protect against a failure of HVPLS hub connectivity. The PE network element monitors hub facing connectivity elements and declares a hub connectivity failure upon a certain amount of those hub facing connectivity elements failing, and fabricates a failure of its spoke facing connectivity elements causing the MTU to detect an HVPLS spoke connectivity failure and switch to a secondary HVPLS spoke connection. Other methods and apparatuses are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.