IGMP Proxy

IGMP proxy enables a multicast router to learn multicast group membership information and forward multicast packets based upon the group membership information. The IGMP Proxy is capable of functioning only in certain topologies that do not require Multicast Routing Protocols (i.e., DVMRP, PIM-DM, and PIM-SM) and have a tree-like topology, as there is no support for features like reverse path forwarding (RPF) to correct packet route loops.

The proxy contains many downstream interfaces and a unique upstream interface explicitly configured. It performs the host side of the IGMP protocol on its upstream interface and the router side of the IGMP protocol on its downstream interfaces.

The IGMP proxy offers a mechanism for multicast forwarding based only on IGMP membership information. The router must decide about forwarding packets on each of its interfaces based on the IGMP membership information. The proxy creates the forwarding entries based on the membership information and adds it to the multicast forwarding cache (MFC) in order not to make the forwarding decision for subsequent multicast packets with same combination of source and group.

CLI Examples

The CLI component of the Dell switch allows the end users to configure the network device and to view device settings and statistics using a serial interface or telnet session.

Example #1: Configuring IGMP Proxy on the Router

This command enables the IGMP Proxy on the router. To enable IGMP Proxy on the router no multicast routing protocol should be enabled and also multicast forwarding must be enabled on the router. Use these commands from the Interface mode:

console#configure ip routing ip multicast ip igmp interface vlan 15

ip igmp-proxy

Additional configuration options are available for the igmp-proxy command:

<cr>

Press Enter to execute the command.

reset-status

Reset All the proxy interface status

 

parameters.

unsolicited-report-interval

Configure IGMP Proxy unsolicited report

 

interval.

The value of the unsolicited report interval can range from 1 to 260 seconds. The default is 1 second. Use this command from the Interface mode.

Multicast

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Dell 6200 SERIES manual Example #1 Configuring Igmp Proxy on the Router, 151

6200 SERIES specifications

The Dell 6200 Series is a notable line of workstations designed for professionals seeking powerful computing solutions in fields such as engineering, architecture, and design. With its robust architecture and advanced technology, this series stands out for its ability to handle demanding applications while offering reliability and performance.

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