OSPF-hub and spoke配置（二）

13.把NBMA网络类型改成broadcast网络

R1(config)#router ospf 1 R1(config-router)#no neighbor 192.168.0.3  //取消邻居指定 R1(config-router)#no neighbor 192.168.0.2 R1(config-router)#exit R1(config)#interface s0/0 R1(config-if)#ip ospf network broadcast  //修改OSPF网络类型为broadcast R1(config-if)#end

R2(config)#interface s0/1 R2(config-if)#no ip ospf priority 0  //取消接口优先级指定 R2(config-if)#ip ospf network broadcast R2(config-if)#end

R3(config)#interface s0/2 R3(config-if)#no ip ospf priority 0 R3(config-if)#ip ospf network broadcast R3(config-if)#end

说明：当OSPF网络类型修改为broadcast时候，就不需要手动指定邻居，OSPF会用组播224.0.0.5自动建立邻居关系。

 

14.查看OSPF信息

R1#show ip ospf int Serial0/0 is up, line protocol is up   Internet Address 192.168.0.1/24, Area 0   Process ID 1, Router ID 192.168.0.1, Network Type BROADCAST, Cost: 64   Transmit Delay is 1 sec, State DR, Priority 1 //默认优先级是1   Designated Router (ID) 192.168.0.1, Interface address 192.168.0.1   Backup Designated router (ID) 3.3.3.3, Interface address 192.168.0.3   Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5     oob-resync timeout 40     Hello due in 00:00:01   Supports Link-local Signaling (LLS)   Index 2/2, flood queue length 0   Next 0x0(0)/0x0(0)   Last flood scan length is 1, maximum is 1   Last flood scan time is 0 msec, maximum is 4 msec   Neighbor Count is 2, Adjacent neighbor count is 2     Adjacent with neighbor 2.2.2.2     Adjacent with neighbor 3.3.3.3  (Backup Designated Router)   Suppress hello for 0 neighbor(s) Loopback0 is up, line protocol is up   Internet Address 1.1.1.1/24, Area 0   Process ID 1, Router ID 192.168.0.1, Network Type LOOPBACK, Cost: 1   Loopback interface is treated as a stub Host

15.查看OSPF邻居表

R1#show ip ospf nei   Neighbor ID     Pri   State           Dead Time   Address         Interface 2.2.2.2           1   FULL/DROTHER    00:00:37    192.168.0.2     Serial0/0 3.3.3.3           1   FULL/BDR        00:00:37    192.168.0.3     Serial0/0

R2#show ip ospf nei   Neighbor ID     Pri   State           Dead Time   Address         Interface 192.168.0.1       1   FULL/DR         00:00:30    192.168.0.1     Serial0/1 说明：此时，R2是DR。

16.测试连通性

R1#ping 3.3.3.3 source lo0   Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds: Packet sent with a source address of 1.1.1.1 !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 28/56/80 ms R1#ping 2.2.2.2 source lo0   Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds: Packet sent with a source address of 1.1.1.1 !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 16/52/68 ms

R3#ping 1.1.1.1 source lo0   Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds: Packet sent with a source address of 3.3.3.3 !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 8/39/72 ms R3#ping 2.2.2.2 source lo0   Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds: Packet sent with a source address of 3.3.3.3 !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 64/90/108 ms

17.把broadcast类型网络改成point-to-multipoint网络

R1(config)#interface s0/0 R1(config-if)#no ip ospf network broadcast R1(config-if)#ip ospf network point-to-multipoint //把OSPF网络类型改成点到多点 R1(config-if)#end

R2(config)#int s0/1 R2(config-if)#no ip ospf network broadcast R2(config-if)#ip ospf network point-to-multipoint R2(config-if)#end

R3(config)#int s0/2 R3(config-if)#no ip ospf network broadcast R3(config-if)#ip ospf network point-to-multipoint R3(config-if)#end

18.查看OSPF的邻居表

R1#show ip ospf nei   Neighbor ID     Pri   State           Dead Time   Address         Interface 3.3.3.3           0   FULL/  -        00:01:41    192.168.0.3     Serial0/0 2.2.2.2           0   FULL/  -        00:01:46    192.168.0.2     Serial0/0 R2#show ip ospf nei   Neighbor ID     Pri   State           Dead Time   Address         Interface 192.168.0.1       0   FULL/  -        00:01:35    192.168.0.1     Serial0/1 R3#show ip ospf nei   Neighbor ID     Pri   State           Dead Time   Address         Interface 192.168.0.1       0   FULL/  -        00:01:57    192.168.0.1     Serial0/2

说明：OSPF把点到多点网络看成多条点到点网络的集合，所以它具有点到点网络的特点，即支持广播，没有DR和BDR的选举。

19.测试连通性

R1#ping 2.2.2.2 source lo0   Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds: Packet sent with a source address of 1.1.1.1 !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 36/69/92 ms R1#ping 3.3.3.3 source lo0   Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds: Packet sent with a source address of 1.1.1.1 !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 36/71/92 ms R3#ping 1.1.1.1 source lo0   Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds: Packet sent with a source address of 3.3.3.3 !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 36/70/108 ms R3#ping 2.2.2.2 source lo0   Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds: Packet sent with a source address of 3.3.3.3 !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 40/86/128 ms

20.网络把Point-to-multipoint类型网络改成point-to-multipoint nonbroadcast

R1(config)#interface s0/0 R1(config-if)#no ip ospf network point-to-multipoint R1(config-if)#ip ospf network point-to-multipoint non-broadcast //指定网络类型为点到多点非广播 R1(config-if)#exit R1(config)#router ospf 1 R1(config-router)#neighbor 192.168.0.2 //指定邻居 R1(config-router)#neighbor 192.168.0.3 R1(config-router)#end

说明：OSPF认为点到多点非广播网络没有广播能力，所以必须手动指定邻居，没有DR和BDR选举

R2(config)#interface s0/1 R2(config-if)#no ip ospf network point-to-multipoint R2(config-if)#ip ospf network point-to-multipoint non-broadcast R2(config-if)#end R3(config)#interface s0/2 R3(config-if)#no ip ospf network point-to-multipoint R3(config-if)#ip ospf network point-to-multipoint non-broadcast R3(config-if)#end

21.查看OSPF邻居表

R1#show ip ospf nei   Neighbor ID     Pri   State           Dead Time   Address         Interface 3.3.3.3           0   FULL/  -        00:01:31    192.168.0.3     Serial0/0 2.2.2.2           0   FULL/  -        00:01:31    192.168.0.2     Serial0/0 R2#show ip ospf nei   Neighbor ID     Pri   State           Dead Time   Address         Interface 192.168.0.1       0   FULL/  -        00:01:47    192.168.0.1     Serial0/1 R3#show ip ospf nei   Neighbor ID     Pri   State           Dead Time   Address         Interface 192.168.0.1      0   FULL/  -        00:01:34    192.168.0.1     Serial0/2

 

22.测试连通性

R1#ping 3.3.3.3 source lo0   Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds: Packet sent with a source address of 1.1.1.1 !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 12/48/84 ms R1#ping 2.2.2.2 source lo0   Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds: Packet sent with a source address of 1.1.1.1 !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 16/53/84 ms R2#ping 3.3.3.3 source lo0   Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds: Packet sent with a source address of 2.2.2.2 !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 24/55/96 ms R2#ping 1.1.1.1 source lo0   Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds: Packet sent with a source address of 2.2.2.2 !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 28/50/76 ms