Fast reroute (FRR) protection at the edge of a RFC 2547 network
US7983153B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2009 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Aug 6, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In one embodiment, an edge device in a first routing domain is configured to communicate with a second routing domain via a data link. The edge device receives a data packet containing a destination address that is reachable via the second routing domain and an indication that the data packet is a protected packet that was previously rerouted from another edge device in the first routing domain via a Multi-Protocol Label Switching (MPLS) Fast Reroute (FRR) backup path. The edge device determines if communication with the second routing domain is still available via the data link, and if so, removes the indication that the data packet is a protected packet and forwards the data packet to the second routing domain, and, if not, drops the data packet to prevent the data packet from being rerouted a second time in the first routing domain on another MPLS FRR backup path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.