When DHCP servers are programmed to offer WLAN Controller IP addresses as Option 43 for Cisco Aironet LAPs, for example, Cisco Aironet 1130, 1140, 1200, 1230 and/or 1240 series access points, the sub-option TLV block is defined in this way:
*Type—0xf1 (decimal 241)
* Length—Number of controller IP addresses * 4 * Value—List of the WLC management interfaces, typically translated to hexadecimal values
The Type value is : * Type—0xf1 (decimal 241) ? for access points 1520 ?