Optimized fast re-route in MPLS ring topologies
US8467289B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2010 |
| Grant date | Jun 18, 2013 |
| Priority date | — |
| Expiry date | Oct 27, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L47/127
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method performed on a network element employing Multi-protocol Label Switching (MPLS) to optimize bandwidth in a ring topology network including a back-up Label Switch Path (LSP) for a protected LSP by re-routing traffic onto the back-up LSP to avoid shared links between the protected LSP and back-up LSP, including receiving a first labeled packet from another label switch router (LSR) in the back-up LSP, the first labeled packet indicating protection switch of data from the protected LSP to the back-up LSP, determining whether a shared link in the ring topology network exists between the protected LSP and the back-up LSP, rerouting traffic for the protected LSP onto an optimized back-up LSP to remove the shared link, receiving a second labeled packet indicating that a protection switch of data, and restoring routing of the traffic onto the protected LSP in response to receiving the second labeled packet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.