
配置缺省路由:
[R1]ip route-static 0.0.0.0 0 16.0.0.2
 [R1]ip route-static 0.0.0.0 0 116.0.0.2
 [R2]ip route-static 0.0.0.0 0 26.0.0.2
 [R3]ip route-static 0.0.0.0 0 36.0.0.2
 [R4]ip route-static 0.0.0.0 0 46.0.0.2
 [R5]ip route-static 0.0.0.0 0 56.0.0.2
  
 第二步:R1/4/5为全连的MGRE结构,R1/2/3为星型的拓扑结构,R1为中心站点
 R1/4/5为全连的MGRE结构
[R1]int t0/0/1
 [R1-Tunnel0/0/1]ip add 11.0.0.1 24    
 [R1-Tunnel0/0/1]tunnel-protocol gre p2mp 
 [R1-Tunnel0/0/1]source 116.0.0.1
 [R1-Tunnel0/0/1]
 [R1-Tunnel0/0/1]nhrp network-id 110
 [R1-Tunnel0/0/1]nhrp entry multicast dynamic 
 [R1-Tunnel0/0/1]nhrp entry 11.0.0.2 46.0.0.1 register 
 [R1-Tunnel0/0/1]nhrp entry 11.0.0.3 56.0.0.1 register
[R4]int t0/0/1
 [R4-Tunnel0/0/1]ip add 11.0.0.2 24
 [R4-Tunnel0/0/1]tunnel-protocol gre p2mp 
 [R4-Tunnel0/0/1]source 46.0.0.1
 [R4-Tunnel0/0/1]nhrp network-id 110
 [R4-Tunnel0/0/1]nhrp entry multicast dynamic 
 [R4-Tunnel0/0/1]nhrp entry 11.0.0.1 116.0.0.1 register 
 [R4-Tunnel0/0/1]nhrp entry 11.0.0.3 56.0.0.1 register
[R5]int t0/0/1
 [R5-Tunnel0/0/1]ip add 11.0.0.3 24
 [R5-Tunnel0/0/1]tunnel-protocol gre p2mp 
 [R5-Tunnel0/0/1]source 56.0.0.1
 [R5-Tunnel0/0/1]nhrp network-id 110
 [R5-Tunnel0/0/1]nhrp entry multicast dynamic 
 [R5-Tunnel0/0/1]nhrp entry 11.0.0.1 116.0.0.1 register  
 [R5-Tunnel0/0/1]nhrp entry 11.0.0.2 46.0.0.1 register
 R1/2/3为星型的拓扑结构,R1为中心站点
[R2]int t 0/0/0
 [R2-Tunnel0/0/0]ip add 10.0.0.2 24    
 [R2-Tunnel0/0/0]tunnel-protocol gre p2mp 
 [R2-Tunnel0/0/0]source GigabitEthernet 0/0/0
 [R2-Tunnel0/0/0]nhrp network-id 100    
 [R2-Tunnel0/0/0]nhrp entry 10.0.0.1 16.0.0.1 register 
[R3]int t 0/0/0
 [R3-Tunnel0/0/0]ip add 10.0.0.3 24    
 [R3-Tunnel0/0/0]tunnel-protocol gre p2mp 
 [R3-Tunnel0/0/0]source GigabitEthernet 0/0/0
 [R3-Tunnel0/0/0]nhrp network-id 100    
 [R3-Tunnel0/0/0]nhrp entry 10.0.0.1 16.0.0.1 register 
第三步.所有私有网段可以互相通讯,私有网段使用OSPF完成
[R1]ospf 1 router-id 1.1.1.1
 [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 10.0.0.0 0.0.0.255    
 [R1-ospf-1-area-0.0.0.0]network 11.0.0.0 0.0.0.255
 [R1]int t0/0/0
 [R1-Tunnel0/0/0]ospf network-type p2mp
 [R1]int t0/0/1
 [R1-Tunnel0/0/1]ospf network-type broadcast 
[R2]ospf 1 router-id 2.2.2.2
 [R2-ospf-1]area 0    
 [R2-ospf-1-area-0.0.0.0]network 10.0.0.0 0.0.0.255
 [R2-ospf-1-area-0.0.0.0]network 192.168.2.0 0.0.0.255
 [R2]int t0/0/0
 [R2-Tunnel0/0/0]ospf network-type p2mp
[R3]ospf 1 router-id 3.3.3.3
 [R3-ospf-1]area 0
 [R3-ospf-1-area-0.0.0.0]network 10.0.0.0 0.0.0.255
 [R3-ospf-1-area-0.0.0.0]network 192.168.3.0 0.0.0.255
 [R3]int t0/0/0
 [R3-Tunnel0/0/0]ospf network-type p2mp
 [R4]ospf 1 router-id 4.4.4.4
 [R4-ospf-1]area 0
 [R4-ospf-1-area-0.0.0.0]network 11.0.0.0 0.0.0.255
 [R4-ospf-1-area-0.0.0.0]network 192.168.4.0 0.0.0.255
 [R4]int t0/0/1
 [R4-Tunnel0/0/1]ospf network-type broadcast 
[R5]ospf 1 router-id 5.5.5.5
 [R5-ospf-1]area 0
 [R5-ospf-1-area-0.0.0.0]network 11.0.0.0 0.0.0.255
 [R5-ospf-1-area-0.0.0.0]network 192.168.5.0 0.0.0.255
 [R5]int t0/0/1
 [R5-Tunnel0/0/1]ospf network-type broadcast