Specifications

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Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
OL-5260-01
Chapter 5 Administering the Access Point
Configuring the Access Point to Provide DHCP Service
Configuring the Access Point to Provide DHCP Service
These sections describe how to configure the access point to act as a DHCP server:
• Setting up the DHCP Server, page 5-18
• Monitoring and Maintaining the DHCP Server Access Point, page 5-19
Setting up the DHCP Server
By default, access points are configured to receive IP settings from a DHCP server on your network. You
can also configure an access point to act as a DHCP server to assign IP settings to devices on both your
wired and wireless LANs.
The 1100 series access point becomes a mini-DHCP server by default when it is configured with factory
default settings and it cannot receive IP settings from a DHCP server. As a mini-DHCP server, the 1100
series access point provides up to 20 IP addresses between 10.0.0.11 and 10.0.0.30 to a PC connected to
its Ethernet port and to wireless client devices configured to use either no SSID or tsunami as the SSID,
and with all security settings disabled. The mini-DHCP server feature is disabled automatically when
you assign a static IP address to the 1100 series access point. Because it has a console port to simplify
initial setup, the 1200 series access point does not become a DHCP server automatically.
For detailed information on DHCP-related commands and options, refer to the Configuring DHCP
chapter in the Cisco IOS IP Configuration Guide, Release 12.2. Click this URL to browse to the
“Configuring DHCP” chapter:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr_c/ipcprt1/1cfdhcp.htm
Beginning in privileged EXEC mode, follow these steps to configure an access point to provide DHCP
service:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
ip dhcp excluded-address low_address
[ high_address ]
Exclude the access point’s IP address from the range of addresses the
access point assigns. Enter the IP address in four groups of characters,
such as 10.91.6.158.
The access point assumes that all IP addresses in a DHCP address pool
subnet are available for assigning to DHCP clients. You must specify the
IP addresses that the DHCP Server should not assign to clients.
(Optional) To enter a range of excluded addresses, enter the address at the
low end of the range followed by the address at the high end of the range.
Step 3
ip dhcp pool pool_name Create a name for the pool of IP addresses that the access point assigns in
response to DHCP requests, and enter DHCP configuration mode.
Step 4
network subnet_number
[ mask | prefix-length ]
Assign the subnet number for the address pool. The access point assigns
IP addresses within this subnet.
(Optional) Assign a subnet mask for the address pool, or specify the
number of bits that comprise the address prefix. The prefix is an
alternative way of assigning the network mask. The prefix length must be
preceded by a forward slash (/).