Configuring Router Interface IP and DHCP Settings
This guide explains how to configure a router’s FastEthernet interface with a static IP address, enable DHCP services, set address exclusions, and configure a host to obtain its IP settings automatically, using Cisco IOS command-line syntax.
The following steps configure the router’s FastEthernet0/0 interface with IP address 192.168.1.254/24 and activate the interface.
R1(config)#interface fastEthernet 0/0<br/>R1(config-if)#ip address 192.168.1.254 255.255.255.0<br/>R1(config-if)#no shutdown<br/><br/>R1(config)#ip dhcp pool vlan1<br/>R1(dhcp-config)#network 192.168.1.0 255.255.255.0<br/>R1(dhcp-config)#default-router 192.168.1.254<br/>R1(dhcp-config)#dns-server 202.106.0.20<br/>R1(config)#ip dhcp excluded-address 192.168.1.1<br/>R1(config)#ip dhcp excluded-address 192.168.1.100Next, a DHCP pool named vlan1 is created, defining the network, default gateway, DNS server, and excluded address ranges (192.168.1.1 and 192.168.1.100).
Finally, host A is set to obtain its IP configuration automatically, as illustrated by the screenshots below.
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