Cisco Systems 78-11741-02 manual Configuring a Dhcp Server Boot File, IPC-73

Configuring DHCP

DHCP Configuration Task List

Configuring a DHCP Server Boot File

The boot file is used to store the boot image for the client. The boot image is generally the operating system the client uses to load. To specify a boot file for the DHCP client, use the following command in DHCP pool configuration mode:

Command	Purpose
Router(dhcp-config)# bootfile filename	Specifies the name of the file that is used as a boot image.

Configuring the Number of Ping Packets

By default, the DHCP Server pings a pool address twice before assigning a particular address to a requesting client. If the ping is unanswered, the DHCP Server assumes (with a high probability) that the address is not in use and assigns the address to the requesting client. To change the number of ping packets the DHCP Server should send to the pool address before assigning the address, use the following command in global configuration mode:

Command	Purpose
Router(config)# ip dhcp ping packets	Specifies the number of ping packets the DHCP Server sends to a pool
number	address before assigning the address to a requesting client. The default is
	two packets. Setting the count argument to a value of 0 turns off DHCP
	Server ping operation completely.

Configuring the Timeout Value for Ping Packets

By default, the DHCP Server waits 500 milliseconds before timing out a ping packet. To change the amount of time the server waits, use the following command in global configuration mode:

Command	Purpose
Router(config)# ip dhcp ping timeout milliseconds	Specifies the amount of time the DHCP Server must wait before
	timing out a ping packet. The default is 500 milliseconds.

Enabling the Cisco IOS DHCP Client on Ethernet Interfaces

To acquire an IP address via DHCP on an Ethernet interface, use the following command in interface configuration mode:

Command	Purpose
Router(config-if)#ip address dhcp [client-id interface name]	Specifies that the Ethernet interface acquires an IP
[hostname host-name]	address through DHCP.

Cisco IOS IP Configuration Guide

IPC-73