Distributed failure recovery in a routed ethernet network
US9001647B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 2013 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Dec 17, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/66
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Link identifiers such as VIDs, selected from a defined range of values, are locally assigned by each node on a link state protocol controlled Ethernet network to each of its links or adjacencies. The link identifiers are assigned by the nodes such that each link or adjacency at the node is uniquely identified by a different link identifier. A link state protocol adjacency notification mechanism or other flooding mechanism is used to disseminate the locally assigned link identifiers to other nodes on the link state protocol controlled Ethernet network. The link identifiers are added by the nodes to their topology databases to enable detour routes to be locally calculated by the nodes on the network in a distributed manner. Upon occurrence of a failure, the link identifiers are used to source route traffic around the failure so that traffic may continue to traverse the link state protocol controlled Ethernet network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.