Cisco Aironet 1200 Series - Overview; A P P E N D I X G Configuring DHCP Option 43 for Lightweight Access Points; Configuring Option 43 for 1000 Series Access Points

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Cisco Aironet 1200 Series Access Point Hardware Installation Guide
OL-8370-04
Appendix G Configuring DHCP Option 43 for Lightweight Access Points
Overview
Overview
This section contains a DHCP Option 43 configuration example on the embedded Cisco IOS DHCP
server for use with Cisco Aironet lightweight access points. For instructions on configuring DHCP
Option 43 on Microsoft, Sun Solaris, Linux, and Lucent QIP DHCP servers, consult the document at this
URL:
http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a00808714f
e.shtml
For other DHCP server implementations, consult the DHCP server documentation for configuring DHCP
Option 43. In Option 43, you should use the IP address of the controller management interface.
Note 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.
Cisco Aironet 1000 series access points use a comma-separated string format for DHCP Option 43.
Other Cisco Aironet access points use 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 strings for Cisco access points capable of operating
in lightweight mode are listed in Table G-1:
The format of the TLV block for 1130, 1200, and 1240 series access points is listed below:
• Type: 0xf1 (decimal 241)
• Length: Number of controller IP addresses * 4
• Value: List of WLC management interfaces
Configuring Option 43 for 1000 Series Access Points
To configure DHCP Option 43 for Cisco 1000 series lightweight access points in the embedded Cisco
IOS DHCP server, follow these steps:
Step 1 Enter configuration mode at the Cisco IOS command line interface (CLI).
Table G-1 Lightweight Access Point VCI Strings
Access Point Vendor Class Identifier (VCI)
Cisco Aironet 1000 series
Airespace.AP1200
Cisco Aironet 1100 series
Cisco AP c1100
Cisco Aironet 1130 series
Cisco AP c1130
Cisco Aironet 1200 series
Cisco AP c1200
Cisco Aironet 1240 series
Cisco AP c1240
Cisco Aironet 1300 series
Cisco AP c1300
Cisco Aironet 1500 series
Cisco AP.LAP1510