Cisco Cisco Aironet 1140 Access Point Guía De Instalación

This section contains a DHCP Option 43 configuration example on a Windows 2003 Enterprise DHCP 
server for use with Cisco Aironet lightweight access points. For other DHCP server implementations, 
consult product documentation for configuring DHCP Option 43. In Option 43, you should use the 
IP address of the controller management interface.

DHCP Option 43 is limited to one access point type per DHCP pool. You must configure a 
separate DHCP pool for each access point type.

The 1140 series access point uses the type-length-value (TLV) format for DHCP Option 43. DHCP 
servers must be programmed to return the option based on the access point’s DHCP Vendor Class 
Identifier (VCI) string (DHCP Option 60). The VCI string for the 1140 series access point is:

The format of the TLV block is listed below: 

Type: 0xf1 (decimal 241) 

Length: Number of controller IP addresses * 4 

Value: List of WLC management interfaces 

To configure DHCP Option 43 in the embedded Cisco IOS DHCP server, follow these steps: 

Enter configuration mode at the Cisco IOS CLI. 

Create the DHCP pool, including the necessary parameters such as default router and name 
server. A DHCP scope example is as follows: 

 <pool name> 

 <IP Network> <Netmask> 

 <Default router> 

 <DNS Server> 

Where:

<pool name> is the name of the DHCP pool, such as AP1140

<IP Network> is the network IP address where the controller resides, such as 

10.0.15.1

<Netmask> is the subnet mask, such as 255.255.255.0

<Default router> is the IP address of the default router, such as 10.0.0.1

<DNS Server> is the IP address of the DNS server, such as 10.0.10.2

Add the option 60 line using the following syntax: 

VCI string” 

For the VCI string, “Cisco AP c1140”. The quotation marks must be included.