CCNA实验:

要求：1、完成设备基本配置

      2、在R1、R2、R3上配置静态路由，保证全网可达

      3、在R1、R3上去掉上一步配置的静态路由，改用默认路由，仍全网可达。

R1:

enconf thostname R1interf s0/0ip address 192.168.12.1 255.255.255.0no shinter f1/0ip address 192.168.1.254 255.255.255.0no sh

R2:

enconf thostname R2interf s0/0ip address 192.168.12.2 255.255.255.0no shinterf s0/1ip address 192.168.23.2 255.255.255.0no sh

R3:

en conf thostname R3interf s0/0ip address 192.168.23.3 255.255.255.0no shinterf f1/0ip address 192.168.2.254 255.255.255.0no sh

PC1:

enconf thostname PC1no ip routingip default-gateway 192.168.1.254interf f0/0ip address 192.168.1.1 255.255.255.0no sh

PC2:

enconf thostname PC2no ip routingip default-gateway 192.168.2.254interf f0/0ip address 192.168.2.1 255.255.255.0no sh