MLD Configuration Guidelines

To configure the Multicast Listener Discovery (MLD) protocol, include the mld statement:

mld {

    interface interface-name {

        disable; 

        ssm-map ssm-map-name;

        static {

            group group {

                source source; 

            }    

        }

        version version;

    }

    query-interval seconds; 

    query-last-member-interval seconds; 

    query-response-interval seconds; 

    robust-count number; 

    traceoptions {

        file name <replace> <size size> <files number> <no-stamp> 

            <(world-readable | no-world-readable)>;

        flag flag <flag-modifier> <disable>; 

    }

} 

You can include this statement at the following hierarchy levels:

• [edit protocols]
• [edit logical-routers logical-router-name protocols]

For an overview of logical routers and a detailed example of logical router configuration, see the logical routers chapter of the JUNOS Feature Guide.

By default, MLD is automatically enabled on all broadcast interfaces when you configure Protocol Independent Multicast (PIM) or the Distance Vector Multicast Routing Protocol (DVMRP).

This chapter describes the following tasks for configuring MLD:

• Minimum MLD Configuration
• Enabling MLD
• Modifying the MLD Version
• Modifying the MLD Host-Query Message Interval
• Modifying the MLD Query Response Interval
• Modifying the Last-Member Query Interval
• Modifying the Robustness Variable
• Enabling MLD Static Group Membership
• Tracing MLD Protocol Traffic
• Disabling MLD