Enhancements to PIM fast re-route with upstream activation packets
US8913482B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2012 |
| Grant date | Dec 16, 2014 |
| Priority date | — |
| Expiry date | Sep 12, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/243
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An upstream activation mechanism provides enhancements to PIM-SM based fast re-route in a multicast communication network, where secondary paths provides redundancy to a multicast tree and are on standby to reduce bandwidth usage when there is no failure in the network. Upon receiving an indication of a loss of connection to the primary path of the multicast tree network, a network node that has a failure-free secondary path to a common source node of the multicast tree sends an activation packet upstream toward the common source node via the failure-free secondary path. The activation packet causes one or more upstream nodes to unblock their respective outgoing interfaces to thereby activate transmission of the multicast data traffic on the failure-free secondary path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.