配置
r1:
ip配置;
[r1]interface GigabitEthernet 0/0/0
[r1-GigabitEthernet0/0/0]ip address 16.0.0.1 24
[r1]interface GigabitEthernet 0/0/1
[r1-GigabitEthernet0/0/1]ip address 17.0.0.1 24
[r1]interface LoopBack 0
[r1-LoopBack0]ip address 192.168.1.1 24
缺省路由：
[r1]ip route-static 0.0.0.0 0 17.0.0.2
[r1]ip route-static 0.0.0.0 0 16.0.0.2
隧道接口：
[r1]interface Tunnel 0/0/0
[r1-Tunnel0/0/0]ip address 192.168.7.1 24
[r1-Tunnel0/0/0]tunnel-protocol gre p2mp
[r1-Tunnel0/0/0]source 17.0.0.1
[r1-Tunnel0/0/0]nhrp network-id 100
开启伪广播：
[r1-Tunnel0/0/0]nhrp entry multicast dynamic
修改隧道接口类型：
[r1-Tunnel0/0/0]ospf network-type broadcast
隧道接口：
[r1]interface Tunnel 0/0/1
[r1-Tunnel0/0/1]ip address 192.168.6.1 24
[r1-Tunnel0/0/1]tunnel-protocol gre p2mp
[r1-Tunnel0/0/1]source 16.0.0.1
开启伪广播：
[r1-Tunnel0/0/1]nhrp entry multicast dynamic
[r1-Tunnel0/0/1]nhrp network-id 400
修改隧道接口类型：
[r1-Tunnel0/0/1]ospf network-type broadcast
ospf配置：
[r1]ospf 1 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 192.168.6.0 0.0.0.255
[r1-ospf-1-area-0.0.0.0]network 192.168.7.0 0.0.0.255
r2：
ip配置:
[R2]interface GigabitEthernet 0/0/0
[R2-GigabitEthernet0/0/0]ip address 26.0.0.1 24
[R2]interface LoopBack 0
[R2-LoopBack0]ip address 192.168.2.1 24
缺省路由：
[R2]ip route-static 0.0.0.0 0 26.0.0.2
隧道接口：
[R2]interface Tunnel 0/0/0
[R2-Tunnel0/0/0]ip address 192.168.6.2 24
[R2-Tunnel0/0/0]tunnel-protocol gre p2mp
[R2-Tunnel0/0/0]source GigabitEthernet 0/0/0
[R2-Tunnel0/0/0]nhrp entry 192.168.6.1 16.0.0.1 register
[r2-Tunnel0/0/0]nhrp network-id 400
修改隧道接口类型：
[R2-Tunnel0/0/0]ospf network-type broadcast
放弃DR选取让R1成为DR：
[r2-Tunnel0/0/0]ospf dr-priority 0
ospf配置：
[R2]ospf 1 router-id 2.2.2.2
[R2-ospf-1]area 0
[R2-ospf-1-area-0.0.0.0]network 192.168.2.0 0.0.0.255
[R2-ospf-1-area-0.0.0.0]network 192.168.6.0 0.0.0.255
r3：
ip配置:
[r3]interface GigabitEthernet 0/0/0
[r3-GigabitEthernet0/0/0]ip address 36.0.0.1 24
[r3]interface LoopBack 0
[r3-LoopBack0]ip address 192.168.3.1 24
缺省路由：
[r3]ip route-static 0.0.0.0 0 36.0.0.2
隧道接口：
[r3]interface Tunnel 0/0/0
[r3-Tunnel0/0/0]ip address 192.168.6.3 24
[r3-Tunnel0/0/0]tunnel-protocol gre p2mp
[r3-Tunnel0/0/0]source GigabitEthernet 0/0/0
[r3-Tunnel0/0/0]nhrp entry 192.168.6.1 16.0.0.1 register
[r3-Tunnel0/0/0]nhrp network-id 400
修改隧道接口类型：
[r3-Tunnel0/0/0]ospf network-type broadcast
放弃DR选取让R1成为DR：
[r3-Tunnel0/0/0]ospf dr-priority 0
ospf配置：
[r3]ospf 1 router-id 3.3.3.3
[r3-ospf-1]area 0
[r3-ospf-1-area-0.0.0.0]network 192.168.3.0 0.0.0.255
[r3-ospf-1-area-0.0.0.0]network 192.168.6.0 0.0.0.255
r4：
ip配置:
[r4]interface GigabitEthernet 0/0/0
[r4-GigabitEthernet0/0/0]ip address 46.0.0.1 24
[r4]interface LoopBack 0
[r4-LoopBack0]ip address 192.168.4.1 24
缺省路由：
[r4]ip route-static 0.0.0.0 0 46.0.0.2
隧道接口：
[r4]interface Tunnel 0/0/0
[r4-Tunnel0/0/0]ip address 192.168.7.2 24
[r4-Tunnel0/0/0]tunnel-protocol gre p2mp
[r4-Tunnel0/0/0]source GigabitEthernet 0/0/0
[r4-Tunnel0/0/0]nhrp entry 192.168.7.1 17.0.0.1 register
[r4-Tunnel0/0/0]nhrp entry 192.168.7.3 56.0.0.1 register
[r4-Tunnel0/0/0]nhrp network-id 100
修改隧道接口类型：
[r4-Tunnel0/0/0]ospf network-type broadcast
ospf配置：
[r4]ospf 1 router-id 4.4.4.4
[r4-ospf-1]area 0
[r4-ospf-1-area-0.0.0.0]network 192.168.7.0 0.0.0.255
[r4-ospf-1-area-0.0.0.0]network 192.168.4.0 0.0.0.255
r5：
ip配置:
[r5]interface GigabitEthernet 0/0/0
[r5-GigabitEthernet0/0/0]ip address 56.0.0.1 24
[r5]interface LoopBack 0
[r5-LoopBack0]ip address 192.168.5.1 24
缺省路由：
[r5]ip route-static 0.0.0.0 0 56.0.0.2
隧道接口：
[r5]interface Tunnel 0/0/0
[r5-Tunnel0/0/0]ip address 192.168.7.3 24
[r5-Tunnel0/0/0]tunnel-protocol gre p2mp
[r5-Tunnel0/0/0]source GigabitEthernet 0/0/0
[r5-Tunnel0/0/0]nhrp entry 192.168.7.1 17.0.0.1 register
[r5-Tunnel0/0/0]nhrp entry 192.168.7.2 17.0.0.2 register
[r5-Tunnel0/0/0]nhrp network-id 100
修改隧道接口类型：
[r5-Tunnel0/0/0]ospf network-type broadcast
ospf配置：
[r5]ospf 1 router-id 5.5.5.5
[r5-ospf-1]area 0
[r5-ospf-1-area-0.0.0.0]network 192.168.7.0 0.0.0.255
[r5-ospf-1-area-0.0
测试
r1pingr2
r1pingr4
r1ospf
