56、组播配置实验之PIM Sparse Mode利用Auto-RP动态选取RP

1、Auto-RP解析

2、实验拓扑

3、基础配置

R1配置

interface Loopback0

 ip address 1.1.1.1 255.255.255.0

interface Serial0/1

 ip address 12.1.1.1 255.255.255.0

interface Serial0/2

 ip address 14.1.1.1 255.255.255.0

interface FastEthernet1/0

 ip address 13.1.1.1 255.255.255.0

router ospf 110

 router-id 1.1.1.1

 network 1.1.1.0 0.0.0.255 area 0

 network 12.1.1.0 0.0.0.255 area 0

 network 13.1.1.0 0.0.0.255 area 0

 network 14.1.1.0 0.0.0.255 area 0

R2配置

interface Loopback0

 ip address 2.2.2.2 255.255.255.0

interface Serial0/0

 ip address 25.1.1.2 255.255.255.0

interface Serial0/1

 ip address 12.1.1.2 255.255.255.0

router ospf 110

 router-id 2.2.2.2

 network 2.2.2.0 0.0.0.255 area 0

 network 12.1.1.0 0.0.0.255 area 0

 default-information originate always

R3配置

interface FastEthernet1/0

 ip address 13.1.1.3 255.255.255.0

router ospf 110

 router-id 3.3.3.3

 network 13.1.1.0 0.0.0.255 area 0

R4配置

interface Serial0/0

 ip address 46.1.1.4 255.255.255.0

interface Serial0/2

 ip address 14.1.1.4 255.255.255.0

router ospf 110

 router-id 4.4.4.4

 network 14.1.1.0 0.0.0.255 area 0

R5配置

interface Serial0/0

 ip address 25.1.1.5 255.255.255.0

R6配置

interface Serial0/0

 ip address 46.1.1.6 255.255.255.0

no ip routing

ip default-gateway 46.1.1.4

4、配置PIM Sparse Mode

R1配置

ip multicast-routing 

interface Serial0/1

 ip pim sparse-mode 

interface Serial0/2

 ip pim sparse-mode 

interface FastEthernet1/0

 ip pim sparse-mode 

R2配置

ip multicast-routing 

interface Serial0/0

 ip pim sparse-mode      

interface Serial0/1

 ip pim sparse-mode 

R3配置

ip multicast-routing 

interface FastEthernet1/0

 ip pim sparse-mode 

R4配置

ip multicast-routing 

interface Serial0/0

 ip pim sparse-mode 

interface Serial0/2

 ip pim sparse-mode 

R6配置

interface Serial0/0

 ip igmp join-group 224.1.1.1

5、Auto-RP动态选举RP

配置Auto-RP需要遵循以下规则

1、PIM模式要配置为sparse-dense模式（当Sparse模式无法工作的时候，可以工作在Dense模式下，启动备份冗余的作用）

2、CRP、MA通常使用环回口，且需通过进IGP中

3、MA的环回口也要配置为sparese-dense模式

我们这里讲R1配置为CRP，R2配置为MA

R1配置

interface Loopback0

 ip pim sparse-dense-mode

interface Serial0/1

 ip pim sparse-dense-mode

interface Serial0/2

 ip pim sparse-dense-mode

interface FastEthernet1/0

 ip pim sparse-dense-mode

ip pim send-rp-announce loopback 0 scope 8

R2配置

interface Loopback0

 ip pim sparse-dense-mode

interface Serial0/0

 ip pim sparse-dense-mode

interface Serial0/1

 ip pim sparse-dense-mode

ip pim send-rp-discovery loopback 0 scope 8

R3配置

interface FastEthernet1/0

 ip pim sparse-dense-mode

R4配置

interface Serial0/0

 ip pim sparse-dense-mode

interface Serial0/2

 ip pim sparse-dense-mode