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DHCP Configuration Overview

A typical DHCP server configuration provides the following configuration settings for a particular subnet on a device interface:

An IP address pool, with one address excluded from the pool.
Default and maximum lease times.
Domain search suffixes. These suffixes specify the domain search list used by a client when resolving hostnames with DNS.
A DNS name server.
Device solicitation address option (option 32). The IP address excluded from the IP address pool is reserved for this option.

In addition, the DHCP server might assign a static address to at least one client on the subnet. Table 1 provides the settings and values for the sample DHCP server configuration.

Table 1: Sample DHCP Configuration Settings

Setting	Sample Value
DHCP Subnet Configuration
Address pool subnet address	192.168.2.0/24
High address in the pool range	192.168.2.254
Low address in the pool range	192.168.2.2
Address pool default lease time, in seconds	1,209,600 (14 days)
Address pool maximum lease time, in seconds	2,419,200 (28 days)
Domain search suffixes	mycompany.net mylab.net
Address to exclude from the pool	192.168.2.33
DNS server address	192.168.10.2
Identifier code for router solicitation address option	32
Type choice for router solicitation address option	Ip address
IP address for router solicitation address option	192.168.2.33
DHCP MAC Address Configuration
Static binding MAC address	01:03:05:07:09:0B
Fixed address	192.168.2.50

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DHCP Configuration Overview

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Published: 2012-06-29