Overview; Appendix D Configuring Dhcp Option - Cisco Aironet 1570 Series Installation Manual

Overview

Overview
For up-to-date information on how to use DHCP Option 43 and to see sample configurations for DHCP
Option 43 for lightweight Cisco Aironet access points (LAPs), go to this URL:
http://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/97066-dhcp-option-43
-00.html
The following section contains a DHCP Option 43 configuration example on a DHCP server for use with
Cisco Aironet Access Points. For other DHCP server implementations, consult DHCP server product
documentation for configuring DHCP Option 43. In Option 43, 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
Note
DHCP pool for each access point type.
Cisco Aironet 1570 series access points use a type-length-value (TLV) format for DHCP Option 43.
DHCP servers must be programmed to return the option based on the access point DHCP Vendor Class
Identifier (VCI) string (DHCP Option 60). The VCI strings for Cisco access points that can operate in
lightweight mode are listed in
Table D-1
Access Point
Cisco Aironet 1570 series
The following is the format of the TLV block:
•
•
•
Configuring Option 43 for 1570 Series Access Points
To configure DHCP Option 43 for Cisco Aironet 1570 series access points in the embedded Cisco IOS
DHCP server, follow these steps:
Enter configuration mode at the Cisco IOS CLI.
Step 1
Create the DHCP pool, including the necessary parameters such as default router and name server. The
Step 2
commands used to create a DHCP pool are as follows:
ip dhcp pool pool name
network IP Network Netmask
default-router Default router
dns-server DNS Server
Where:
pool name is the name of the DHCP pool, such as AP1570
IP Network is the network IP address where the controller resides, such as 10.0.15.1
Cisco Aironet 1570 Series Outdoor Access Point Hardware Installation Guide
D-2
Lightweight Access Point VCI Strings
Type: 0xf1 (decimal 241)
Length: Number of controller IP addresses * 4
Value: List of WLC management interfaces
Table D-1.
Vendor Class Identifier (VCI)
Cisco AP c1570
Appendix D Configuring DHCP Option 43
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