MPLS fast reroute without full mesh traffic engineering
US7230913B1 · kind B1 · utility
25Cited by
1References
28Claims
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Assignee
Inventors
Key dates
| Filing date | Jun 11, 2002 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Mar 19, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Fast Reroute capability is added to an IP network to guarantee fast recovery to IP traffic in case of link or node failure without the need to deploy a full mesh of MPLS Traffic Engineering Label Switched Paths (LSPs). In one implementation, to protect a link, a 1-hop primary LSP is configured for the protected link and in addition a backup tunnel is configured to protect the 1-hop primary LSP. To protect a node, 2-hop primary LSPs are established for the link pairs traversing the node and backup tunnel(s) are configured to protect these 2-hop primary LSPs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.