Failure protection for P2MP tunnel head-end node
US8279749B2 · kind B2 · utility
6Cited by
6References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2006 |
| Grant date | Oct 2, 2012 |
| Priority date | — |
| Expiry date | Dec 30, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/28
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a primary head-end node (PHE) and one or more backup head-end nodes (BHEs) receive traffic from a common multicast network. The PHE establishes a primary point-to-multipoint (P2MP) tunnel and forwards the multicast traffic onto the primary P2MP tunnel. The PHE then notifies a selected BHE of one or more characteristics of the primary P2MP tunnel, and the selected BHE establishes a backup P2MP tunnel with the characteristics of the primary P2MP tunnel. In response to detecting a failure of the PHE, the BHE initiates forwarding of the multicast traffic onto the backup P2MP tunnel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.