Loop prevention technique for MPLS using service labels
US7961600B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2010 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | Jan 26, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a loss of communication is detected between a first edge device of a computer network and a neighboring routing domain. A data packet is received at the first edge device, where the received data packet contains a destination address that is reachable via the neighboring routing domain. A determination is made whether a service label is located in a Multi-Protocol Label Switching (MPLS) label stack included in the received data packet. A service label in the MPLS label stack indicates that the received data packet was previously rerouted in accordance with fast reroute (FRR) operations. In response to a determination that the received data packet does not include a service label in the MPLS label stack, the received data packet is rerouted to a second edge device of the computer network for forwarding to the neighboring routing domain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.