Enhanced DVMRP for destination-based forwarding of multicast data
US7522596B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2003 |
| Grant date | Apr 21, 2009 |
| Priority date | — |
| Expiry date | Apr 26, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L65/611
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An enhanced DVMRP method for regulating multicast traffic in a destination-based forwarding router is disclosed. As a plurality of neighbor multicast routers are detected and route reports exchanged, the enhanced DVMRP router transmits one or more restricted route reports, each of the restricted route reports omitting the routes associated with one or more of its branch interfaces. With the exception of the neighbor router detected on a given interface, a route report omits reference to other branch interfaces to prevent branch-to-branch routing of multicast streams that may cause a destination-based forwarding router in a multi-access network to transmit duplicate packets to a group member. The enhanced DVMRP method also employs flash updates indicating that some branch interfaces are inaccessible in order to prevent multicast routing through newly-detected neighbor multicast routers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.