Changing the IGMP Version

By default, the router runs IGMP version 2. To change to version 3 (for SSM functionality), include the version statement:

version 3; 

You can configure this statement at the following hierarchy levels:

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

To enable source-specific multicast (SSM) functionality, version 3 must be configured on the host and the host's directly connected router.

NOTE: Routers running different versions of IGMP negotiate the lowest common version of IGMP that is supported by hosts on their subnet and operate in that version. If you have already configured the router to use IGMP version 1 and then configure it to use IGMP version 2, the router continues to use IGMP version 1 for up to 6 minutes and then uses IGMP version 2.