Label switched path setup using fast reroute bypass tunnel
US9246838B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 2011 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | Dec 8, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L47/825
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A label switched path (LSP) is established within a network using an MPLS fast reroute bypass tunnel when a resource along a primary path of the LSP has failed but is protected by the MPLS fast reroute bypass tunnel. While establishing the LSP, a network device identifies a failed resource along a primary path of the LSP. In response to identifying the failed resource, the network device determines whether a bypass tunnel exists from the network device to a node along the primary path, wherein the bypass tunnel avoids the failed resource. Upon determining that the bypass tunnel exists, the network device tunnels a message for establishing the LSP to the node over the bypass tunnel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.