Methods for finding a merge point node for MPLS fast re-route
US7626925B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2003 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Jan 16, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for unambiguously identifying merge points associated with backup label switched paths (LSPs) which substantially bypass border routers included along a primary LSP are disclosed. According to one aspect of the present invention, a method for finding a merge point between a primary LSP and a backup LSP which has a head-end and a tail-end in different regions includes obtaining identifying information, which identifies nodes on the path of the primary LSP, from a record route object associated with the primary LSP. The method also includes comparing a node address of the identifying information with a destination address of the backup LSP or a node address present in a node identifier (node-ID) subobject of the backup LSP to identify the merge point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.