IGMP Proxy
Configure the
IGMP Proxy
IGMP Proxy provides a means for routers to receive any or all multicast traffic from an upstream device if the router is not able to run PIM and runs only IGMP. IGMP Proxy supports IGMP v1, v2, and v3.
IGMP Proxy enables the router to issue IGMP host messages on behalf of hosts that the router discovered through standard PIM interfaces. The router acts as a proxy for its hosts and performs the host portion of the IGMP task on the upstream interface as follows:
•When queried, the router sends group membership reports for the groups learned.
•When one of its hosts joins a multicast address group to which none of its other hosts belong, the router sends unsolicited membership reports to that group.
•When the last of its hosts in a particular multicast group leaves the group, the router sends an unsolicited leave group membership report to group (multicast IP address 224.0.0.2).
IGMP proxy configuration notes
When using IGMP Proxy, you must do the following.
1.Configure PIM on all multicast client ports to build the group membership table. The group membership table will be reported by the proxy interface. Refer to Globally enabling and disabling PIM on page 85.
2.Enable IP multicast on an interface to an upstream router that will be the IGMP proxy interface and configure IGMP Proxy on that interface.
IGMP proxy limitations
•IGMP Proxy cannot be enabled on the same interface on which PIM SM or PIM DM is enabled.
•IGMP Proxy is only supported in a PIM Dense environment where there are IGMP clients connected to the Brocade device. The Brocade device does not send IGMP reports on an IGMP proxy interface for remote clients connected to a PIM neighbor,because it is not aware of groups that the remote clients are interested in. Static groups on the other PIM interfaces are included in proxy reports.
•PIM DM must be enabled in passive mode. This is a change from the previous implementation; to be backward compatible,
Configuring IGMP Proxy
Perform the following steps to configure IGMP Proxy.
144 | FastIron Ethernet Switch IP Multicast Configuration Guide |
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