ICND1 Labs

Lab 4-2: Using a Router to provide DHCP Services

Visual Topology

Command Line

Command Description
default-router address
dns-server address
ip dhcp excluded-address ip address [last ip address]
ip dhcp pool name
ip helper-address address
lease {days[hours][minutes] | infinite}

Physical Topology Diagram

  • Task 1: Setting-up DHCP address Pools
  • Task 2: Excluding static IP addresses from a DHCP Pool.
  • Task 3: Testing the DHCP Service

Lab 4-2: Using a Router to provide DHCP Services

Task 1: Setting-up DHCP address Pools

Step 1: Access the CLI of the router

Step 2: Configure a DHCP pool named SALES

Rx(config)#ip dhcp pool SALES

Step 3: Adding the IP network/subnet to the DHCP pool

Rx(dhcp-config)#network 10.2.2.0 255.255.255.0

Step 4: Adding the default gateway and dns server options to the DHCP pool

Rx(dhcp-config)#default-router 10.2.2.1
Rx(dhcp-config)#dns-server 8.8.8.8
Rx(dhcp-config)#exit

Task 2: Excluding static IP addresses from a DHCP Pool.

Step 1: Limiting the scope of the DHCP pool

Rx(config)#ip dhcp excluded-address 10.2.2.1 10.2.2.9
Rx(config)#ip dhcp excluded-address 10.2.2.21 10.2.2.254

Task 3: Testing the DHCP Service.

Step 1: Reconfigure the network properties on the PC to request an IP address from a DHCP server.

Step 2: From the PC command prompt verify your IP address.

Remember this is an example output.

Step 3: Access the CLI on the router and execute the following command to display current IP address allocation.

Rx#show ip dhcp binding

Lab Answer Keys:

[Locker] The locker [id=4139] doesn't exist or the default lockers were deleted.

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