Efficient way to manage host subscription state on a proxy device
US8559427B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 25, 2011 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Feb 11, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/4625
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a proxy for an upstream multicast router using IGMP or MLD, a process efficiently and scalably manages an interface between the upstream multicast router and the proxy by tracking a subset of multicast sources from the plurality of multicast sources required by an aggregate state of the plurality of multicast subscriber nodes. The tracking uses an interface tracking table for determining the aggregate state for the interface instead of a forwarding information base (FIB) and membership database that tracks more specific data detailing each multicast source required by each multicast subscriber node. The process receives an IGMP or MLD membership report with at least one change in the set of multicast sources to be received on the interface, updates the interface tracking table to reflect the at least one change in the subset of multicast sources and notifies the upstream multicast router of the at least one change.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.