IGMP Configuration Guidelines

To configure the Internet Group Management Protocol (IGMP), include the igmp statement:

igmp {

    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, IGMP is automatically enabled on all broadcast interfaces on which you configure the Distance Vector Multicast Routing Protocol (DVMRP) or Protocol Independent Multicast (PIM).

This chapter describes the following tasks for configuring IGMP:

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