Appendix G Configuring DHCP Option 43 for Lightweight Access Points
Configuring Option 43 for 1100, 1130, 1200, 1240, and 1300 Series Lightweight Access Points
Step 3 Add the option 60 line using the following syntax:
option 60 ascii “VCI string”
For the VCI string, use the value from Table
option 43 hex <hex string>
The hex string is assembled by concatenating the TLV values shown below:
Type + Length + Value
Type is always f1(hex). Length is the number of controller management IP addresses times 4 in hex. Value is the IP address of the controller listed sequentially in hex.
For example, suppose that there are two controllers with management interface IP addresses, 10.126.126.2 and 10.127.127.2. The type is f1(hex). The length is 2 * 4 = 8 = 08 (hex). The IP addresses translate to 0a7e7e02 and 0a7f7f02. Assembling the string then yields f1080a7e7e020a7f7f02. The resulting Cisco IOS command added to the DHCP scope is listed below:
option 43 hex f1080a7e7e020a7f7f02
Cisco Aironet 1200 Series Access Point Hardware Installation Guide
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