multicast的两条命令

ip igmp join-group与ip igmp static-group的区别？

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

以下有例为证

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