1.基本概念
IGMP Snooping主要用于在交换机上优化组播流量的转发行为。
1)路由器接口(RP):运行IGMP Snooping的交换机朝向上游组播路由器的接口。
2)成员接口(MP):运行IGMP Snooping的交换机朝向组播成员的接口。
3)二层组播转发表:用于指导交换机转发组播流量。
2.IGMP Snooping基础配置
![图片[1]-8.10 IGMP Snooping-大赛人网](https://www.dsrw.com/wp-content/uploads/2023/03/图片11-5.png)
1)R1配置(ENSP环境下手动在路由器上面向交换机的接口下配置静态组播组源地址)
[R1]multicast routing-enable
[R1]interface GigabitEthernet 0/0/0
[R1-GigabitEthernet0/0/0]pim dm
[R1-GigabitEthernet0/0/0]igmp enable
[R1-GigabitEthernet0/0/0]igmp static-group 224.1.1.1
[R1]interface GigabitEthernet 0/0/1
[R1-GigabitEthernet0/0/1]pim dm
2)SW1基本配置
[SW1]igmp-snooping enable
[SW1]vlan 10
[SW1-vlan10]igmp-snooping enable
[SW1]interface GigabitEthernet 0/0/24
[SW1-GigabitEthernet0/0/24]port link-type access
[SW1-GigabitEthernet0/0/24]port default vlan 10
[SW1-GigabitEthernet0/0/24]quit
[SW1]interface GigabitEthernet 0/0/1
[SW1-GigabitEthernet0/0/1]port link-type access
[SW1-GigabitEthernet0/0/1]port default vlan 10
[SW1]interface GigabitEthernet 0/0/2
[SW1-GigabitEthernet0/0/2]port link-type access
[SW1-GigabitEthernet0/0/2]port default vlan 10
[SW1]interface GigabitEthernet 0/0/3
[SW1-GigabitEthernet0/0/3]port link-type access
[SW1-GigabitEthernet0/0/3]port default vlan 10
3)SW1配置GigabitEthernet0/0/24为静态路由接口,GigabitEthernet0/0/1、GigabitEthernet0/0/2接口为特定组播组
[SW1-GigabitEthernet0/0/24]igmp-snooping static-router-port vlan 10
[SW1-GigabitEthernet0/0/1]l2-multicast static-group group-address 224.1.1.1 vlan 10
[SW1-GigabitEthernet0/0/2]l2-multicast static-group group-address 224.1.1.1 vlan 10
4)查看VLAN中路由器接口
[SW1]display igmp-snooping router-port vlan 10
Port Name UpTime Expires Flags
VLAN 10, 1 router-port(s)
GE0/0/24 00:22:59 -- STATIC | DYNAMIC
5)查看成员接口信息
[SW1]display igmp-snooping port-info vlan 10
VLAN 10, 1 Entry(s)
(*, 224.1.1.1) GE0/0/1 S--
GE0/0/2 S--
2 port(s)
[SW1]display l2-multicast forwarding-table vlan 10
Router-port GigabitEthernet0/0/24 10
(*, 224.1.1.1) GigabitEthernet0/0/1 10
GigabitEthernet0/0/2 10
GigabitEthernet0/0/24 10
6)IGMP Snooping代理
[SW1]igmp-snooping enable
[SW1]vlan 1
[SW1-vlan1]igmp-snooping enable
[SW1-vlan1]igmp-snooping proxy
[SW1]display igmp-snooping statistics vlan 1
IGMP Snooping Packets Counter
Statistics for VLAN 1
Recv V1 Report 0
Recv V2 Report 0
Recv V3 Report 0
Recv V1 Query 0
Recv V2 Query 58
Recv V3 Query 0
Recv Leave 0
Recv Pim Hello 80
Send Query(S=0) 0
Send Query(S!=0) 0
Proxy Send General Query 2
Proxy Send Group-Specific Query 0
Proxy Send Group-Source-Specific Query 0
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