Graceful designated router handoff
US10348647B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2017 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | Dec 13, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L49/25
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a first Protocol Independent Multicast (PIM) router includes port interfaces to receive multicast traffic from a first network and forward the traffic to at least one receiver, which is in a sub-network including other PIM routers, and a routing processor configured, in response to a decision for the first PIM router to relinquish being a designated router, to generate a PIM Hello message with a first option descriptor and a first priority, the first option descriptor indicating a staggered handoff process, and send the PIM Hello message, receipt of the PIM Hello message by the other PIM routers being operative to result in a designated router election electing a new designated router, the new designated router being operative to initiate the staggered handoff process causing the first PIM router to continue forwarding traffic until the new designated router has built a multicast routing tree.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.