To configure the router to be a statically connected member of the specified group on the interface, use the ip igmp static-group command in interface configuration mode
To have the router join a multicast group, use the ip igmp join-group command in interface configuration mode
The following examples are proof
ip igmp static-group 224.5.5.5
(*, 224.5.5.5), 00:01:06/00:02:24, RP 0.0.0.0, flags: DC
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Loopback0, Forward/Sparse, 00:01:06/00:02:24
ip igmp join-group 224.6.6.6
(*, 224.6.6.6), 00:00:02/00:02:58, RP 0.0.0.0, flags: DCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Loopback0, Forward/Sparse, 00:00:02/00:02:58
To have the router join a multicast group, use the ip igmp join-group command in interface configuration mode
The following examples are proof
ip igmp static-group 224.5.5.5
(*, 224.5.5.5), 00:01:06/00:02:24, RP 0.0.0.0, flags: DC
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Loopback0, Forward/Sparse, 00:01:06/00:02:24
ip igmp join-group 224.6.6.6
(*, 224.6.6.6), 00:00:02/00:02:58, RP 0.0.0.0, flags: DCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Loopback0, Forward/Sparse, 00:00:02/00:02:58