第七章 使用Tunnel实现组播负载均衡

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1、第七章使用Tunnel实现组播负载均衡在单播路由表里，到达同一个目的地可以有多个下一跳，而在组播路由表里，到达同一个组，也可以有多个出口，但是这多个出口一定是到达不同的接收者，这是组播工作的一个基本特点。本测试主要研究在到一个组播接收者有多条等成本路径的时候，通过tunnel实现负载均衡。R2和R4之间有2条等成本的路径（通过调整COST实现），R4加入到组238.1.1.1，所有的路由运行PIM-SM，R1作为RP。具体实验拓扑：R1的具体配置hostnameR1ipmulticast-routinginterfaceLoopback0ipaddress1.1.1.1255.255.2

2、55.255interfaceSerial1/0ipaddress12.1.1.1255.255.255.0ippimsparse-modeclockrate64000interfaceSerial2/0ipaddress13.1.1.1255.255.255.0ippimsparse-moderouterospf1router-id1.1.1.1network0.0.0.0255.255.255.255area0ippimrp-address1.1.1.1R2的具体配置hostnameR2ipmulticast-routinginterfaceLoopback0ipaddress2.2

3、.2.2255.255.255.255interfaceEthernet0/0ipaddress10.1.1.2255.255.255.0ippimsparse-modeipospfcost64interfaceSerial1/0ipaddress24.1.1.2255.255.255.0ippimsparse-modeclockrate64000interfaceSerial2/0ipaddress12.1.1.2255.255.255.0ippimsparse-moderouterospf1router-id2.2.2.2network0.0.0.0255.255.255.255ar

4、ea0ippimrp-address1.1.1.1R3的具体配置hostnameR3ipmulticast-routinginterfaceLoopback0ipaddress3.3.3.3255.255.255.255interfaceSerial1/0ipaddress13.1.1.3255.255.255.0ippimsparse-modeclockrate64000interfaceSerial2/0ipaddress35.1.1.3255.255.255.0ippimsparse-moderouterospf1router-id3.3.3.3network0.0.0.0255.

5、255.255.255area0ippimrp-address1.1.1.1R4的具体配置hostnameR4ipmulticast-routinginterfaceLoopback0ipaddress4.4.4.4255.255.255.255ippimsparse-modeipigmpjoin-group238.1.1.1interfaceEthernet0/0ipaddress10.1.1.4255.255.255.0ippimsparse-modeipospfcost64interfaceSerial2/0ipaddress24.1.1.4255.255.255.0ippimsp

6、arse-moderouterospf1router-id4.4.4.4network0.0.0.0255.255.255.255area0ippimrp-address1.1.1.1R5的具体配置hostnameR5ipmulticast-routinginterfaceLoopback0ipaddress5.5.5.5255.255.255.255interfaceSerial1/0ipaddress35.1.1.5255.255.255.0ippimsparse-modeclockrate64000routerospf1router-id5.5.5.5network0.0.0.02

7、55.255.255.255area0ippimrp-address1.1.1.1我们来查看一下R2的路由表中4.4.4.4的路由信息：R2#shiproute4.4.4.4Routingentryfor4.4.4.4/32Knownvia"ospf1",distance110,metric65,typeintraareaLastupdatefrom10.1.1.4onEthernet0/0,00:05:50agoRoutingDe