This article describes the issue of IGMP snooping being globally disabled for all VLANs, when it is disabled for a single VLAN member on a trunk port. If IGMP snooping is disabled on certain VLANs and then disabled for other VLANs on a trunk interface, it is disabled for all the VLANs over that trunk port.

To enable IGMP snooping for one or a few VLAN members on a trunk port; whereas disabling it for other VLANs on the port.

Example :

• The ge-0/0/0 trunk port is a member of 10, 20, 30, and 40 VLANs.
• IGMP snooping is enabled for 10 and 20; whereas disabled for 30 and 40.

juniper@test# show interfaces ge-0/0/0
unit 0 {
    family ethernet-switching {
        port-mode trunk;
            vlan {
                members [ 10 20 30 40 ];
            }
    }
}

juniper@test# show protocols igmp-snooping
vlan 10;
vlan 20;
vlan 30 {
    disable;
}
vlan 40 {
    disable;
}

IGMP snooping is not differentiated for individual VLAns, due to the way that the PFE handles IGMP snooping over a trunk port.

1. Configure a static IGMP group for the VLAN member.
2. Configure the mrouter port that requests the multicast stream:

   root@XRE200-LC-NC-XRE1# show protocols igmp-snooping
   vlan all;
       vlan 10 {
           interface ae23.0 {
               static {
                   group 225.0.0.1;
               }
           }
       }