Fast reroute for bidirectional co-routed traffic engineering tunnels
US9160652B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2012 |
| Grant date | Oct 13, 2015 |
| Priority date | — |
| Expiry date | Dec 15, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In one embodiment, network devices are configured to route traffic and signaling onto co-routed bypass tunnels. Co-routed bypass tunnels protect against node or link failures in a label switched paths. The co-routed bypass tunnels provide bidirectional protection. In one example, a node acting as the point of local repair (PLR) receives a resource reservation state message at a first node and extracts a tunnel sender address from the reservation state message. The PLR is configured to identify a bypass tunnel to a second node in the reverse direction of the label switched path and signal resource reservation messages over the bypass tunnel in the reverse direction. In another example, a PLR receives a resource reservation message with bypass tunnel identification and the PLR is configured to identify a bypass tunnel to a second node in the reverse direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.