配置ospf 虚电路
实验 5-4 配置虚电路
一、
实验目的
配置ospf的虚电路，是一个与核心区域不相连的区域可以访问ospf的核心区域！
二、
拓扑结构
三、
实验步骤
1.
基本接口的配置
测试：auckland ping 192.168.240.1 通
Singapore ping 192.168.224.1
通
2.
配置ospf
auckland
(config-router)#do sh ip route
192.168.240.0/30 is subnetted, 1 subnets
C 192.168.240.0 is directly connected, Serial0/0
C 192.168.248.0/24 is directly connected, FastEthernet1/0
C 192.168.252.0/24 is directly connected, Loopback0
问题：为什么Auckland 只出现直连的路由？
区域间的流量必须经过核心区域，尽管区域51与区域3相邻，但是他们不能共享路由更新
3.
配置虚电路
singapore
#sho ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
192.168.252.1 0 FULL/ - 00:00:35 192.168.240.2 Serial0/1
192.168.1.3 0 FULL/ - 00:00:33 192.168.224.1 Serial0/0
singapore
(config)#router ospf 1
singapore
(config-router)#area 51 virtual-link 192.168.1.3
sanjose3(config)#router ospf 1
sanjose3(config-router)#area 51 virtual-link 192.168.240.1
测试：
auckland
(config)#do sh ip route
O IA 192.168.224.0/24 [110/128] via 192.168.240.1, 00:02:17,
Serial0/0
192.168.240.0/30 is subnetted, 1 subnets
C 192.168.240.0 is directly connected, Serial0/0
O IA 192.168.232.0/24 [110/65] via 192.168.240.1, 00:02:17,
Serial0/0
C 192.168.248.0/24 is directly connected, FastEthernet1/0
192.168.0.0/32 is subnetted, 1 subnets
O IA 192.168.0.3 [110/129] via 192.168.240.1, 00:01:12,
Serial0/0
192.168.1.0/32 is subnetted, 1 subnets
O IA 192.168.1.3 [110/129] via 192.168.240.1, 00:01:12,
Serial0/0
C 192.168.252.0/24 is directly connected, Loopback0
singapore
#sh ip ospf vir
Virtual Link OSPF_VL0 to router 192.168.1.3 is up
Run as demand circuit
DoNotAge LSA allowed.
Transit area 51, via interface Serial0/0, Cost of using 64
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:03
Adjacency State FULL (Hello suppressed)
Index 1/3, retransmission queue length 0, number of retransmission 0
First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
Last retransmission scan length is 0, maximum is 0
Last retransmission scan time is 0 msec, maximum is 0 msec
四、
实验总结
学习ospf虚电路的配置，理解虚电路的工作原理和使用方法，进一步理解ospf！！