拓扑结构说明：
①、PC1设置静态IP地址192.168.10.100；PC4配置静态IP地址192.168.20.200。 ②、Switch1和Switch2作为接入交换机。不需要进行配置。 ③、路由器Router1、Router2、Router3和Router4组成一个环形路由阵列。用来测试当OSPF动态路由配置完成以后，数据路由的选择情况。
实验平台搭建： ①、按照拓扑结构图所示，摆放好设备，并使用直连线连接好各个设备。 ②、设置好PC1、PC2的IP地址，网关分别指向Router1、Router2的GigabitEthernet0/0/0的端口地址。 ③、路由器Router1、Router2、Router3和Router4每台路由器均插入2块1端口-GE COMBO WAN 接口卡。用于路由器之间的对连。
设备配置清单：
Router1的配置清单： <Huawei> system-view [Huawei]sysname Router1 [Router1]interface GigabitEthernet0/0/0 [Router1-GigabitEthernet0/0/0]description To_Switch1 [Router1-GigabitEthernet0/0/0]ip address 192.168.10.11 255.255.255.0 [Router1-GigabitEthernet0/0/0]quit [Router1]interface GigabitEthernet1/0/0 [Router1-GigabitEthernet1/0/0]description To_Router3 [Router1-GigabitEthernet1/0/0]ip address 192.168.11.13 255.255.255.0 [Router1-GigabitEthernet1/0/0]quit [Router1]interface GigabitEthernet2/0/0 [Router1-GigabitEthernet2/0/0]description To_Router4 [Router1-GigabitEthernet2/0/0]ip address 192.168.14.14 255.255.255.0 [Router1-GigabitEthernet2/0/0]quit [Router1]ospf [Router1-ospf-1]area 0 [Router1-ospf-1-area-0.0.0.0]network 192.168.10.0 0.0.0.255 [Router1-ospf-1-area-0.0.0.0]network 192.168.11.0 0.0.0.255 [Router1-ospf-1-area-0.0.0.0]network 192.168.14.0 0.0.0.255
Router2的配置清单： <Huawei> system-view [Huawei]sysname Router2 [Router2]interface GigabitEthernet0/0/0 [Router2-GigabitEthernet0/0/0]description To_Switch2 [Router2-GigabitEthernet0/0/0]ip address 192.168.20.12 255.255.255.0 [Router2-GigabitEthernet0/0/0]quit [Router2] interface GigabitEthernet1/0/0 [Router2-GigabitEthernet1/0/0]description To_Router3 [Router2-GigabitEthernet1/0/0]ip address 192.168.12.23 255.255.255.0 [Router2-GigabitEthernet1/0/0]quit [Router2] interface GigabitEthernet2/0/0 [Router2-GigabitEthernet2/0/0]description To_Router4 [Router2-GigabitEthernet2/0/0]ip address 192.168.13.24 255.255.255.0 [Router2-GigabitEthernet2/0/0]quit [Router2]ospf [Router2-ospf-1]area 0 [Router2-ospf-1-area-0.0.0.0]network 192.168.12.0 0.0.0.255 [Router2-ospf-1-area-0.0.0.0]network 192.168.13.0 0.0.0.255 [Router2-ospf-1-area-0.0.0.0]network 192.168.20.0 0.0.0.255
Router3的配置清单： <Huawei> system-view [Huawei]sysname Router3 [Router3] interface GigabitEthernet0/0/0 [Router3-GigabitEthernet0/0/0]description To_Router1 [Router3-GigabitEthernet0/0/0]ip address 192.168.11.31 255.255.255.0 [Router3-GigabitEthernet0/0/0]quit [Router3] interface GigabitEthernet0/0/1 [Router3-GigabitEthernet0/0/1]description To_Router2 [Router3-GigabitEthernet0/0/1]ip address 192.168.12.32 255.255.255.0 [Router3-GigabitEthernet0/0/1]quit [Router3]ospf [Router3-ospf-1]area 0 [Router3-ospf-1-area-0.0.0.0]network 192.168.11.0 0.0.0.255 [Router3-ospf-1-area-0.0.0.0]network 192.168.12.0 0.0.0.255
Router4的配置清单： <Huawei> system-view [Huawei]sysname Router4 [Router4] interface GigabitEthernet0/0/0 [Router4-GigabitEthernet0/0/0]description To_Router1 [Router4-GigabitEthernet0/0/0]ip address 192.168.14.41 255.255.255.0 [Router4-GigabitEthernet0/0/0]quit [Router4]interface GigabitEthernet0/0/1 [Router4-GigabitEthernet0/0/1]description To_Router2 [Router4-GigabitEthernet0/0/1]ip address 192.168.13.42 255.255.255.0 [Router4-GigabitEthernet0/0/1]quit [Router4]ospf [Router4-ospf-1]area 0 [Router4-ospf-1-area-0.0.0.0]network 192.168.13.0 0.0.0.255 [Router4-ospf-1-area-0.0.0.0]network 192.168.14.0 0.0.0.255
配置完成以后，我们检查一下OSPF的路由表是否建立完成。
模拟测试：
进行PC1到PC2的连通测试：PC1至PC2已经成功连通。
跟踪PC1到PC2的路由路径 PC1至PC2的路由路径是：PC1→Router1→Router3→Router2→PC2。
假定Router3和Router4之间，有一台路由器发生故障（如：Router3发生宕机、掉电等），进行PC1到PC2的连通测试 PC1至PC2仍然成功连通；但是PC1至PC2的路由路径发生了改变：PC1→Router1→Router4→Router2→PC2。
假定Router3在故障排除之后，重新开机上线，那么跟踪PC1至PC2路由路径。 PC1至PC2的路由路径没有发生改变：PC1→Router1→Router4→Router2→PC2；仍然是故障恢复前的路由路径。
假定当前路由路径为：PC1→Router1→Router3→Router2→PC2，当Router3与Router1之间的线路发生故障时，进行PC1到PC2的连通测试、并跟踪路由路径 此时，PC1至PC2是可以连通的。从跟踪路由路径的数据可以看出，当前路由路径为：PC1→Router1→Router4→Router2→PC2，数据在选择传输路径的时候，会自动放弃故障路由，而选择其他可达的路由路径。