IGMP-Proxy

An IGMP proxy is typically used for Internet connections with multicast IPTV. Clients or IPTV set top boxes (STBs) on the local network send IGMP messages to receive a specific TV channel. To this end, they join certain multicast groups and later leave them again. The router and/or IGMP proxy receives the IGMP messages and forwards them to the provider network and filters the groups, if required. The IGMP proxy works for the local network with its clients.

An IGMP proxy can also be used in simple multicast routing scenarios, for example via VPN, without having to use PIM. The configuration of the IGMP proxy creates a static (tree) structure without alternative paths, redundancy or loop prevention. IGMP proxies can be "cascaded" by connecting multiple routers in series.