Multicast Snooping Configuration Guidelines

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To configure the general multicast snooping parameters for MX-series routers, include the multicast-snooping-options statement:




multicast-snooping-options {

flood-groups [ ip-addresses ];



forwarding-cache {

threshold suppress value <reuse value>;
}



graceful-restart <restart-duration seconds>;


	traceoptions {
file filename <files number> <size size> <world-readable |
no-world-readable>;
flag flag <flag-modifier> <disable>; 
}


}

You can include this statement at the following hierarchy levels:

[edit bridge-domains bridge-domain-name]
[edit routing-instances routing-instance-name]
[edit routing-instances routing-instance-name bridge-domains bridge-domain-name]
[edit logical-systems logical-system-name routing-instances routing-instance-name]
[edit logical-systems logical-system-name routing-instances routing-instance-name bridge-domains bridge-domain-name]

By default, multicast snooping is disabled. You can enable multicast snooping in VPLS or virtual switch instance types in the instance hierarchy or in one or more bridge domains.

If there are multiple bridge domains configured under a VPLS or virtual switch instance, the multicast snooping options configured at the instance level apply to all the bridge domains. Multicast snooping options configured at the bridge domain level only apply to that particular bridge domain. The options configured at the bridge domain take precedence over the options configured at the instance level. For more information about snooping parameters for IGMP, see IGMP Snooping Configuration Guidelines.

This chapter describes the following tasks for configuring multicast snooping:

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