题目

 地址配置

R1：

R2：

R3：

R4：

R5：

ISP：

 

R1/2/3的星型拓扑结构

R1配置：

 interface Tunnel0/0/0
 ip address 192.168.6.1 255.255.255.0 
 tunnel-protocol gre p2mp
 source 200.1.1.1
 ospf network-type broadcast
 nhrp entry multicast dynamic
 nhrp network-id 100

R2配置：

 interface Tunnel0/0/0
 ip address 192.168.6.2 255.255.255.0 
 tunnel-protocol gre p2mp
 source GigabitEthernet0/0/0
 ospf network-type broadcast
 nhrp network-id 100
 nhrp entry 192.168.6.1 200.1.1.1 register

R3配置：

 interface Tunnel0/0/0
 ip address 192.168.6.3 255.255.255.0 
 tunnel-protocol gre p2mp
 source GigabitEthernet0/0/0
 ospf network-type broadcast
 nhrp network-id 100
 nhrp entry 192.168.6.1 200.1.1.1 register

R1/4/5的全连拓扑结构

R1配置

 interface Tunnel0/0/1
 ip address 192.168.7.1 255.255.255.0 
 tunnel-protocol gre p2mp
 source 200.11.1.1
 ospf network-type broadcast
 nhrp entry multicast dynamic
 nhrp entry 192.168.7.5 200.1.5.1 register
 nhrp entry 192.168.7.4 200.1.4.1 register

R4配置：

 interface Tunnel0/0/1
 ip address 192.168.7.4 255.255.255.0 
 tunnel-protocol gre p2mp
 source 200.1.4.1
 ospf network-type broadcast
 nhrp entry multicast dynamic
 nhrp entry 192.168.7.5 200.11.1.1 register
 nhrp entry 192.168.7.4 200.1.5.1 register

R5配置：

 interface Tunnel0/0/1
 ip address 192.168.7.5 255.255.255.0 
 tunnel-protocol gre p2mp
 source 200.1.5.1
 ospf network-type broadcast
 nhrp entry multicast dynamic
 nhrp entry 192.168.7.5 200.11.1.1 register
 nhrp entry 192.168.7.4 200.1.4.1 register

OSPF协议

R1：

ospf 1 router-id 1.1.1.1 
 area 0.0.0.0 
  network 192.168.1.0 0.0.0.255 
  network 192.168.6.0 0.0.0.255 
  network 192.168.7.0 0.0.0.255 

R2：

ospf 1 router-id 2.2.2.2 
 area 0.0.0.0 
  network 192.168.2.0 0.0.0.255 
  network 192.168.6.0 0.0.0.255 

ospf dr-priority 0

R3：

ospf 1 router-id 3.3.3.3 
 area 0.0.0.0 
  network 192.168.3.0 0.0.0.255 
  network 192.168.6.0 0.0.0.255 

ospf dr-priority 0

R4：

ospf 1 
 area 0.0.0.0 
  network 192.168.4.0 0.0.0.255 
  network 192.168.7.0 0.0.0.255 

R5:

ospf 1 
 area 0.0.0.0 
  network 192.168.5.0 0.0.0.255 
  network 192.168.7.0 0.0.0.255 

结果

R1

 

R2

 

R3

 

R4

 

R5