9.1 IGMPv1实验

9.4.1 IGMPv1

1. 实验目的

1. 熟悉IGMPv1的应用场景
2. 掌握IGMPv1的配置方法

1. 实验拓扑

实验拓扑如图9-7所示：

                                             图9-7：IGMPv1

1. 实验步骤

（1）配置IP地址

MCS1的配置

MCS1的IP地址配置如图9-8所示：

                                                  图9-8：MCS1的配置

MCS1的组播地址配置如图9-9所示：

                                                     图9-9：MCS1组播地址的配置

R1的配置

<Huawei>system-view

Enter system view, return user view with Ctrl+Z.

[Huawei]undo info-center enable

Info: Information center is disabled.

[Huawei]sysname R1

[R1]interface g0/0/0

[R1-GigabitEthernet0/0/0]ip address 192.168.1.1 24

[R1-GigabitEthernet0/0/0]quit

[R1]interface g0/0/1

[R1-GigabitEthernet0/0/1]ip address 12.1.1.1 24

[R1-GigabitEthernet0/0/1]quit

[R1]interface g0/0/2

[R1-GigabitEthernet0/0/2]ip address 13.1.1.1 24

[R1-GigabitEthernet0/0/2]quit

R2的配置

<Huawei>system-view

Enter system view, return user view with Ctrl+Z.

[Huawei]undo info-center enable

Info: Information center is disabled.

[Huawei]sysname R2

[R2]interface g0/0/2

[R2-GigabitEthernet0/0/2]ip address 12.1.1.2 24

[R2-GigabitEthernet0/0/2]quit

[R2]interface g0/0/0

[R2-GigabitEthernet0/0/0]ip address 10.1.1.252 24

[R2-GigabitEthernet0/0/0]quit

R3的配置

<Huawei>system-view

Enter system view, return user view with Ctrl+Z.

[Huawei]undo info-center enable

Info: Information center is disabled.

[Huawei]sysname R3

[R3]interface g0/0/3

[R3-GigabitEthernet0/0/3]ip address 13.1.1.3 24

[R3-GigabitEthernet0/0/3]quit

[R3]interface g0/0/0

[R3-GigabitEthernet0/0/0]ip address 10.1.1.253 24

[R3-GigabitEthernet0/0/0]quit

PC1的配置

PC1的IP地址的配置如图9-10所示：

                                        图9-10：配置PC1的IP地址

PC2的配置

PC2的IP地址配置如图9-11所示：

                                                          图9-11：配置PC2的IP地址

PC3的配置

PC3的IP地址配置如图9-12所示：

                                                   图9-12：配置PC3的IP地址

（2）运行IGP

R1的配置

[R1]ospf router-id 1.1.1.1

[R1-ospf-1]area 0

[R1-ospf-1-area-0.0.0.0]network 192.168.1.0 0.0.0.255

[R1-ospf-1-area-0.0.0.0]network 12.1.1.0 0.0.0.255

[R1-ospf-1-area-0.0.0.0]network 13.1.1.0 0.0.0.255

[R1-ospf-1-area-0.0.0.0]quit

R2的配置

[R2]ospf router-id 2.2.2.2

[R2-ospf-1]area 0

[R2-ospf-1-area-0.0.0.0]network 12.1.1.0 0.0.0.255

[R2-ospf-1-area-0.0.0.0]network 10.1.1.0 0.0.0.255

[R2-ospf-1-area-0.0.0.0]quit

R3的配置

[R3]ospf router-id 3.3.3.3

[R3-ospf-1]area 0

[R3-ospf-1-area-0.0.0.0]network 13.1.1.0 0.0.0.255

[R3-ospf-1-area-0.0.0.0]network 10.1.1.0 0.0.0.255

[R3-ospf-1-area-0.0.0.0]quit

（3）运行PIM-DM

R1的配置

[R1]multicast routing-enable

[R1]interface g0/0/0

[R1-GigabitEthernet0/0/0]pim dm

[R1-GigabitEthernet0/0/0]quit

[R1]interface g0/0/1     

[R1-GigabitEthernet0/0/1]pim dm

[R1-GigabitEthernet0/0/1]quit

[R1]interface g0/0/2

[R1-GigabitEthernet0/0/2]pim dm

[R1-GigabitEthernet0/0/2]quit

R2的配置

[R2]multicast routing-enable

[R2]interface g0/0/2

[R2-GigabitEthernet0/0/2]pim dim

[R2-GigabitEthernet0/0/2]quit

[R2]interface g0/0/0

[R2-GigabitEthernet0/0/0]pim dm

[R2-GigabitEthernet0/0/0]quit

R3的配置

[R3]multicast routing-enable

[R3]interface g0/0/3

[R3-GigabitEthernet0/0/3]pim dm

[R3-GigabitEthernet0/0/3]quit

[R3]interface g0/0/0

[R3-GigabitEthernet0/0/0]pim dm

[R3-GigabitEthernet0/0/0]quit

（4）运行IGMP V1

R2的配置

[R2]interface g0/0/0

[R2-GigabitEthernet0/0/0]igmp enable

[R2-GigabitEthernet0/0/0]igmp version 1

[R2-GigabitEthernet0/0/0]quit

R3的配置

[R3]interface g0/0/0

[R3-GigabitEthernet0/0/0]igmp enable

[R3-GigabitEthernet0/0/0]igmp version 1

[R3-GigabitEthernet0/0/0]quit

1. 实验调试

（1）查看IGMP的接口信息

[R2]display igmp interface

Interface information of VPN-Instance: public net

 GigabitEthernet0/0/0(10.1.1.252):

   IGMP is enabled

   Current IGMP version is 1  //版本为1

   IGMP state: up

   IGMP group policy: none

   IGMP limit: -

   Value of query interval for IGMP (negotiated): -

   Value of query interval for IGMP (configured): 60 s  //查询间隔时间为60s

   Value of other querier timeout for IGMP: 0 s

   Value of maximum query response time for IGMP: -最大查询响应时间不能设置为10s

   Querier for IGMP: 10.1.1.253  //查询路由器，优选IP地址最大的

  Total 1 IGMP Group reported

【技术要点1】查询器的选举原则机制

1、依赖PIM选举接口IP地址大的路由器

2、只有查询器才会发送general query

3、查询器与非查询器均能收到报告报文，生成IGMP表项

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(2)在R2上打开调试信息

<R2>debugging igmp report

<R2>debugging igmp event

<R2>debugging igmp leave

<R2>terminal monitor

<R2>terminal debugging

[R2]info-center enable

（3） 在PC1上点击加入组播224.1.1.1，配置如图9-13所示：

                                                 图9-13：配置PC1加入组播224.1.1.1

（4）在R2上显示的信息

<R2>

Jun 30 2022 17:04:08.880.1-08:00 R2 IGMP/7/REPORT:(public net): Received v1 report for group 224.1.1.1 on interface GigabitEthernet0/0/0(10.1.1.252) (G081904)

（5）查看组成员信息

<R2>display igmp group

Interface group report information of VPN-Instance: public net

 GigabitEthernet0/0/0(10.1.1.252):

  Total 1 IGMP Group reported

   Group Address   Last Reporter   Uptime      Expires    

   224.1.1.1       10.1.1.1        00:27:48    00:02:03   

（6）在R2的g0/0/0处抓包

第一个包membership query，它的报文结构如图9-14所示：

                                             图9-14：membership query包文结构

第二个包membership report，它的包文结构如图9-15所示：

                                     图9-15：membership report包文结构