Scaling enhancement for PIM control messages in multicast VPNs

摘要

A mechanism by which PIM network traffic can be aggregated is provided, thereby reducing the number of PIM messages transmitted by routers in a multicast network. PIM messages are adapted to permit information targeted at multiple destination routers to be included in one PIM message. Join/prune lists for a plurality of upstream neighbor routers can thereby be included in a single PIM message. PIM Hello messages can be similarly aggregated in a single PIM message and both PIM join/prunes and PIM Hellos can be aggregated in a single aggregated PIM message. Through such aggregation of information that would traditionally be transmitted in multiple PIM messages, network bandwidth consumption and router load due to transmission of PIM messages can be reduced.