Failure notification in a network having serially connected nodes
US8223660B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2008 |
| Grant date | Jul 17, 2012 |
| Priority date | — |
| Expiry date | Jan 29, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L41/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Multicast capabilities of a link state protocol controlled network are used to accelerate the flooding advertisement of topology change notifications within portions of the network. This flooding mechanism may be particularly efficient in a network with a large number of two-connected nodes such as a ring network architecture. A control plane specific multicast group address is used when flooding topology change notifications, and a process such as reverse path forwarding check is used as an additional control on forwarding of the notification to prevent looping of control plane packets. Two-connected nodes insert a forwarding entry into their FIB to enable frames containing the control message to be forwarded via the data plane on to the downstream node so that propagation of the control message along a chain of two-connected nodes may occur at data plane speeds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.