实验目的和预计达到的效果：测试在路由器配置静态路由表前后，链路的通断情况。了解静态路由表的作用和机制。
1、拓扑结构说明：、PC1设置静态IP地址192.168.10.100；PC4配置静态IP地址192.168.20.200。、Switch1和Switch2作为接入交换机。不需要进行配置。、路由器RouterRouterRouter3和Router4组成一个环形路由阵列。用来测试当静态路由配置完成以后，数据路由的选择情况
2、实验平台搭建：、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。、设置好PCPC2的IP地址，网关分别指向RouterRouter2的GigabitEthernet0/0/0的端口地址。、路由器RouterRouterRouter3和Router4每台路由器均插入2块1端口-GECOMBOWAN接口卡。用于路由器之间的对连。
设备配置清单：
1、Router1的配置清单：<Huawei>system颍骈城茇-view[Huawei]sysnameRouter1[Router1]interfaceGigabitEther荏鱿胫协net0/0/0[Router1-GigabitEthernet0/0/0]descriptionTo_Switch1[Router1-GigabitEthernet0/0/0]ipaddress192.168.10.11255.255.255.0[Router1-GigabitEthernet0/0/0]quit[Router1]interfaceGigabitEthernet1/0/0[Router1-GigabitEthernet1/0/0]descriptionTo_Router3[Router1-GigabitEthernet1/0/0]ipaddress192.168.11.13255.255.255.0[Router1-GigabitEthernet1/0/0]quit[Router1]interfaceGigabitEthernet2/0/0[Router1-GigabitEthernet2/0/0]descriptionTo_Router4[Router1-GigabitEthernet2/0/0]ipaddress192.168.14.14255.255.255.0[Router1-GigabitEthernet2/0/0]quit[Router1]iproute-static192.168.20.0255.255.255.0GigabitEthernet1/0/0192.168.11.31[Router1]iproute-static192.168.20.0255.255.255.0GigabitEthernet2/0/0192.168.14.41
2、Router2的配置清单：<Huawei>system颍骈城茇-view[Huawei]sysnameRouter2[Router2]interfaceGigabitEther荏鱿胫协net0/0/0[Router2-GigabitEthernet0/0/0]descriptionTo_Switch2[Router2-GigabitEthernet0/0/0]ipaddress192.168.20.12255.255.255.0[Router2-GigabitEthernet0/0/0]quit[Router2]interfaceGigabitEthernet1/0/0[Router2-GigabitEthernet1/0/0]descriptionTo_Router3[Router2-GigabitEthernet1/0/0]ipaddress192.168.12.23255.255.255.0[Router2-GigabitEthernet1/0/0]quit[Router2]interfaceGigabitEthernet2/0/0[Router2-GigabitEthernet2/0/0]descriptionTo_Router4[Router2-GigabitEthernet2/0/0]ipaddress192.168.13.24255.255.255.0[Router2-GigabitEthernet2/0/0]quit[Router2]iproute-static192.168.10.0255.255.255.0GigabitEthernet1/0/0192.168.12.32[Router2]iproute-static192.168.10.0255.255.255.0GigabitEthernet1/0/0192.168.12.32
3、Router3的配置清单：<Huawei>system颍骈城茇-view[Huawei]sysnameRouter3[Router3]interfaceGigabitEther荏鱿胫协net0/0/0[Router3-GigabitEthernet0/0/0]descriptionTo_Router1[Router3-GigabitEthernet0/0/0]ipaddress192.168.11.31255.255.255.0[Router3-GigabitEthernet0/0/0]quit[Router3]interfaceGigabitEthernet0/0/1[Router3-GigabitEthernet0/0/1]descriptionTo_Router2[Router3-GigabitEthernet0/0/1]ipaddress192.168.12.32255.255.255.0[Router3-GigabitEthernet0/0/1]quit[Router3]iproute-static192.168.10.0255.255.255.0GigabitEthernet0/0/0192.168.11.13[Router3]iproute-static192.168.20.0255.255.255.0GigabitEthernet0/0/1192.168.12.23
4、Router4的配置清单：<Huawei>system-view[Huawei]sysnameRouter4[Router4]interfaceGigabitEthernet0/0/0[Router4-GigabitEthernet0/0/0]descriptionTo_Router1[Router4-GigabitEthernet0/0/0]ipaddress192.168.14.41255.255.255.0[Router4-GigabitEthernet0/0/0]quit[Router4]interfaceGigabitEthernet0/0/1[Router4-GigabitEthernet0/0/1]descriptionTo_Router2[Router4-GigabitEthernet0/0/1]ipaddress192.168.13.42255.255.255.0[Router4-GigabitEthernet0/0/1]quit[Router4]iproute-static192.168.10.0255.255.255.0GigabitEthernet0/0/0192.168.14.14[Router4]iproute-static192.168.20.0255.255.255.0GigabitEthernet0/0/1192.168.13.24
模拟测试：
1、、进行PC1到PC2的连通测试可知PC1至PC2已经成功连通。
2、跟踪PC1到PC2的路由路径得到PC1至PC2的路由路径是：PC1→Router1→Router3→Router2→PC2。
3、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。
4、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的路由路径发生了改变：PC1→Router1→Router3→Router2→PC2；恢复到故障前的路由路径。
5、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是不能连通的。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，而PC2的应答数据的路由路径则为：PC2→Router2→Router3，因而无法达到PC1。造成链路中断。
