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# Configuring Static and Dynamic IGMP Interfaces

The router supports static and dynamic IGMP interfaces. Unlike static interfaces, dynamic interfaces are not restored when you reboot the router. For some protocols, dynamic layers can build on static layers in an interface; however, in a dynamic IGMP interface, all the layers are dynamic. See Figure 6 for examples of static and dynamic IGMP interfaces.

Figure 6: Static and Dynamic IGMP Interfaces

You configure static IGMP interfaces by using software such as the CLI or an SNMP application; you configure dynamic IGMP interfaces by using a profile. A profile constitutes a set of attributes for an interface; a profile for dynamic IGMP interfaces contains attributes for configuring all the layers in the interface.

You define a profile by using the same CLI commands that you use to configure a static IGMP interface; however, the mode in which you use the commands differs. Use the commands in Interface Configuration mode to configure a static IGMP interface and in Profile Configuration mode to define a profile.

When you have defined a profile, you can apply it to an interface or a group of interfaces. Profiles provide an efficient method of creating and managing large numbers of dynamic interfaces. For detailed information about creating and assigning profiles, see Configuring Dynamic Interfaces in the JUNOSe Link Layer Configuration Guide. When you create a profile for dynamic IGMP interfaces, specify attributes for configuring all layers in the interface.

You use the following IGMP commands to configure a static IGMP interface. You also use these commands to define the attributes for the IGMP layer when you create a profile for dynamic IGMP interfaces:

Table 5: IGMP Commands

ip igmp | ip igmp query-max-response-time
ip igmp access-group | ip igmp robustness
ip igmp access-source-group | ip igmp ssm-map enable
ip igmp apply-oif-map | ip igmp ssm-map static
ip igmp explicit-tracking | ip igmp query-interval
ip igmp group limit | ip igmp static-exclude
ip igmp immediate-leave | ip igmp static-group
ip igmp last-member-query-interval | ip igmp static-include
ip igmp promiscuous | ip igmp version
ip igmp querier | multicast group port limit
ip igmp querier-timeout |

The following sections describe the tasks associated with these and other ip igmp commands.

You can also use various IGMP-specific RADIUS attributes in RADIUS Access-Accept messages as an alternative method of configuring certain values. See Configuring RADIUS Attributes in the JUNOSe Broadband Access Configuration Guide for additional information.

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