1. Switch mode
router> en // User mode enable
router # conf t // privilege mode configure terminal
2. Start the interface and assign the IP address
router (config) #interface fa0 / 0 // Configuration mode ... assign IP address to port f0 / 0
router (config-if) #ip address 192.168.1.1 255.255.255.0 // The port of the router is used as the gateway, the subnet mask is set according to the need, and the default subnet mask is generally used
router (config-if) #no shutdown // Interface mode
router(config-if)#exit
Three, configure static routing
Destination network Subnet mask (destination) Next hop address
router(config)#ip route 192.168.2.0 255.255.255.0 192.168.3.20
Fourth, check
show ip interface brief // Display port ip
do show ip route // Show route