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Router1(config)#ip multicast-routing
Router1(config)#ip pim ssm default
Router1(config)#interface FastEthernet0/0
Router1(config-if)#ip pim sparse-dense-mode
Router1(config-if)#ip igmp version 3
Router1(config-if)#end
Router1#
如果想使用Source-Specific Multicast(SSM)特性,但是终端设备不支持v3,可以使用思科的IGMP v3lite
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#ip multicast-routing
Router1(config)#ip pim ssm default
Router1(config)#interface FastEthernet0/0
Router1(config-if)#ip pim sparse-dense-mode
Router1(config-if)#ip igmp v3lite
Router1(config-if)#end
Router1#
注释 v3里面最有用的特性就是SSM,不但可以指定想要接收的组播组,还可以指定组播源
23.9. 静态组播路由和组成员
提问 使用静态条目来取代动态的组播路由和组成员
回答
静态组播路由:
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#ip multicast-routing
Router1(config)#ip mroute 192.168.15.0 255.255.255.0 192.168.98.6
Router1(config)#interface Tunnel0
Router1(config-if)#ip address 192.168.98.5 255.255.255.252
Router1(config-if)#ip pim sparse-dense-mode
Router1(config-if)#tunnel mode gre ip
Router1(config-if)#end
Router1#
静态组成员
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#ip multicast-routing
Router1(config)#interface FastEthernet0/0
Router1(config-if)#ip pim sparse-dense-mode
Router1(config-if)#ip igmp join-group 239.5.5.55
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