DHCP & DNS Configuration using Cisco Packet
Tracer
Router Configuration:
1. Assign IP Address to the FastEthernet 0/0 interface
2. Create DHCP pool
3. Configure network, default gateway, excluded addresses and DNS Server
1. Assign IP Address to the FastEthernet 0/0 interface
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#interface fastEthernet 0/0
Router(config-if)#ip address 192.168.1.1 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0,
changed state to up
2. Configure network and default gateway
Router#
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#ip dhcp pool comps
Router(dhcp-config)#network 192.168.1.0 255.255.255.0
Router(dhcp-config)#def
Router(dhcp-config)#default-router 192.168.1.1
Router(dhcp-config)#
3. Select DHCP in IP configuration of PCs in the network as shown:
IP addresses, subnet mask and Default gateway will be assigned dynamically using
DHCP to PCs
4. Add DNS Server to the network and assign IP address to the server.
○ First remove dhcp IP configurations from PCs.
○ Assign static IP address to DNS Server: 192.168.1.2 /24
○ Assign default gateway and dns server as shown in screenshot
○
Configure DNS entry in DNS server
5. Configure dns server & excluded addresses from the pool of IP addresses on router:
Router#config terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#ip dhcp pool comps
Router(dhcp-config)#dns-server 192.168.1.2
Router(dhcp-config)#exit
Router(config)#ip dhcp excluded-address 192.168.1.1 192.168.1.10
Router(config)#do show ip dhcp pool comps
Pool comps :
Utilization mark (high/low) : 100 / 0
Subnet size (first/next) : 0 / 0
Total addresses : 254
Leased addresses : 2
Excluded addresses : 1
Pending event : none
1 subnet is currently in the pool
Current index IP address range Leased/Excluded/Total
192.168.1.1 192.168.1.1 - 192.168.1.254 2 / 1 / 254
Updated IP Configurations of PC0 and PC1 after configuring dns server and excluded
addresses :
6. Open the Web browser of one of the PCs and enter the URL
www.compslab.com in the address bar of the web browser. It should open a
Hosted Web page on the web server (here same server configured with http as
well) as shown in given screenshot.