Scenario 1-1: Configuring a Cisco Router for IP

In this scenario, you see how to configure one Cisco router for IP routing using a Class B (/16) network 161.108.1.0 with a Class C subnet mask (255.255.255.0 or /24 mask).

Figure 1-3 displays the one router, named R1, with one Ethernet interface.

Figure 1-3. IP Routing on Cisco Routers

Example 1-3 displays the IP configuration performed on R1's Ethernet interface.

Example 1-3. IP Configuration on R1
R1(config)#int e 0/0
R1(config-if)#ip address 161.108.1.1 255.255.255.0
R1(config-if)#no shutdown
					4w1d: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up
					4w1d: %LINEPROTO-5-UPDOWN: Line protocol ...

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