8.7 PIM-SM

1.PIM-SM（PIM稀疏模式）

适用于组播规模较大、分散的网络。

2.PIM-SM基础配置（静态RP）

1）R1配置

[R1]ospf 1
[R1-ospf-1]area 0
[R1-ospf-1-area-0.0.0.0]network 192.168.12.0 0.0.0.255
[R1-ospf-1-area-0.0.0.0]network 172.16.1.0 0.0.0.255

[R1]multicast routing-enable 
[R1]interface GigabitEthernet 0/0/0
[R1-GigabitEthernet0/0/0]pim sm
[R1-GigabitEthernet0/0/0]quit
[R1]interface GigabitEthernet 0/0/1
[R1-GigabitEthernet0/0/1]pim sm
[R1]pim
[R1-pim]static-rp 3.3.3.3

2）R2配置

[R2]ospf 1 
[R2-ospf-1]area 0
[R2-ospf-1-area-0.0.0.0]network 192.168.24.0 0.0.0.255
[R2-ospf-1-area-0.0.0.0]network 192.168.13.0 0.0.0.255
[R2-ospf-1-area-0.0.0.0]network 192.168.12.0 0.0.0.255

[R2]multicast routing-enable
[R2]interface GigabitEthernet 0/0/0
[R2-GigabitEthernet0/0/0]pim sm
[R2]interface GigabitEthernet 0/0/1
[R2-GigabitEthernet0/0/1]pim sm                         
[R2]interface GigabitEthernet 0/0/2
[R2-GigabitEthernet0/0/2]pim sm
[R2]pim
[R2-pim]static-rp 3.3.3.3

3）R3配置

[R3-LoopBack0]ip address 3.3.3.3 32
[R3]ospf 1
[R3-ospf-1]area 0
[R3-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0
[R3-ospf-1-area-0.0.0.0]network 192.168.13.0 0.0.0.255
[R3-ospf-1-area-0.0.0.0]network 192.168.34.0 0.0.0.255

[R3]multicast routing-enable
[R3]interface GigabitEthernet 0/0/0
[R3-GigabitEthernet0/0/0]pim sm
[R3]interface GigabitEthernet 0/0/1
[R3-GigabitEthernet0/0/1]pim sm
[R3]pim
[R3-pim]static-rp 3.3.3.3

4）R4配置

[R4]ospf 1
[R4-ospf-1]area 0
[R4-ospf-1-area-0.0.0.0]network 192.168.4.0 0.0.0.255
[R4-ospf-1-area-0.0.0.0]network 192.168.24.0 0.0.0.255
[R4-ospf-1-area-0.0.0.0]network 192.168.34.0 0.0.0.255

[R4]multicast routing-enable
[R4]interface GigabitEthernet 0/0/0
[R4-GigabitEthernet0/0/0]pim sm
[R4-GigabitEthernet0/0/0]igmp enable
[R4]interface GigabitEthernet 0/0/1
[R4-GigabitEthernet0/0/1]pim sm
[R4]interface GigabitEthernet 0/0/2
[R4-GigabitEthernet0/0/2]pim sm
[R4]pim 
[R4-pim]static-rp 3.3.3.3

5）查看pim邻居信息

[R4]display pim neighbor 
 VPN-Instance: public net
 Total Number of Neighbors = 2

 Neighbor        Interface           Uptime   Expires  Dr-Priority  BFD-Session
 192.168.34.3    GE0/0/1             00:01:35 00:01:19 1            N          
 192.168.24.2    GE0/0/2             00:01:20 00:01:43 1 

6）DR配置

<R2>display pim interface 
 VPN-Instance: public net
 Interface           State NbrCnt HelloInt   DR-Pri     DR-Address
 GE0/0/0             up    1      30         1          192.168.13.3   
 GE0/0/1             up    1      30         1          192.168.12.2    (local)
 GE0/0/2             up    1      30         1          192.168.24.4   

[R2-GigabitEthernet0/0/2]pim hello-option dr-priority 1000000
[R2]display pim interface               
 VPN-Instance: public net
 Interface           State NbrCnt HelloInt   DR-Pri     DR-Address
 GE0/0/0             up    1      30         1          192.168.13.3   
 GE0/0/1             up    1      30         1          192.168.12.2    (local)
 GE0/0/2             up    1      30         1000000    192.168.24.2    (local)