S7500交换机PIM-DM组播协议典型配置
一、组网需求：
使用三台S7500交换机S75-A、S75-B、S75-C组网；S75-A连接一台组播源服务器，S75-B、S75-C分别连接客户端A、客户端B，连接端口如下：
S75-A通过e1/0/1端口连接组播源，e1/0/2端口连接S75-B，e1/0/3端口连接S75-C；S75-B通过e1/0/1端口连接客户端A，e1/0/2端口连接S75-A；
S75-C通过e1/0/1端口连接客户端B，e1/0/3端口连接S75-A；
使用OSPF协议发布路由、组播协议使用PIM-DM协议和IGMP协议，视频服务器发送组播地址为225.0.0.1的组播数据，客户端A、B加入该组并用客户端软件接收组播数据。
二、组网图：
三、配置步骤：
1.配置OSPF协议
在S7500交换机的虚接口上启动OSPF路由协议，属于area 0，使用network命令发布路由，确保各交换机OSPF路由表可以正确建立，从客户端A、B可以ping 通组播源服务器地址10.0.2.1/24。
2.启动组播路由协议
[H3C] multicast routing-enable
3.在接口上启动IGMP和PIM-DM协议
S75-A：
[H3C] vlan 2
[H3C-vlan2] port ethernet 1/0/1
[H3C-vlan2] quit
[H3C] vlan 100
[H3C-vlan100] port ethernet 1/0/2
[H3C-vlan100] quit
[H3C] vlan 200
[H3C-vlan200] port ethernet 1/0/3
[H3C-vlan200] quit
[H3C] interface vlan-interface 2
[H3C-vlan-interface2] ip address 10.0.2.254 255.255.255.0 [H3C-vlan-interface2] pim dm
[H3C-vlan-interface2] quit
[H3C] interface vlan-interface 100
[H3C-vlan-interface100] ip address 10.0.100.252 255.255.255.0 [H3C-vlan-interface100] pim dm
[H3C-vlan-interface100] quit
[H3C] interface vlan-interface 200
[H3C-vlan-interface200] ip address 10.0.200.252 255.255.255.0 [H3C-vlan-interface200] pim dm
S75-B：
[H3C] vlan 10
[H3C-vlan10] port ethernet 1/0/1
[H3C-vlan10] quit
[H3C] vlan 100
[H3C-vlan100] port ethernet 1/0/2
[H3C-vlan100] quit
[H3C] interface vlan-interface 10
[H3C-vlan-interface10] ip address 10.0.10.254 255.255.255.0 [H3C-vlan-interface10] pim dm
[H3C-vlan-interface10] quit
[H3C] interface vlan-interface 100
[H3C-vlan-interface100] ip address 10.0.100.253 255.255.255.0 [H3C-vlan-interface100] pim dm
[H3C-vlan-interface100] quit
S75-C：
[H3C] vlan 20
[H3C-vlan20] port ethernet 1/0/1
[H3C-vlan20] quit
[H3C] vlan 200
[H3C-vlan200] port ethernet 1/0/3
[H3C-vlan200] quit
[H3C] interface vlan-interface 20
[H3C-vlan-interface20] ip address 10.0.20.254 255.255.255.0
[H3C-vlan-interface20] pim dm
[H3C-vlan-interface20] quit
[H3C] interface vlan-interface 200
[H3C-vlan-interface200] ip address 10.0.200.253 255.255.255.0
[H3C-vlan-interface200] pim dm
四、配置关键点：
1.二、三层组播可以同时运行在交换机上，但是在同一个VLAN或该
VLAN对应的虚接口上是不能同时运行二层和三层组播协议的。
2.S7500交换机目前一旦全局使能Multicasting-routing，会在现有的所
有三层虚接口上使能igmp，默认会自动配置igmp enable。