HESSID MAC

If you selected the setting user for the HESSID-type, enter the HESSID of your homogeneous ESS as a 6-octet MAC address. For the HESSID, select the BSSID for any access point in your homogeneous ESS, or the MAC address of your WLC, in capital letters and without separators, e.g., 008041AEFD7E for the MAC address 00:80:41:ae:fd:7e.

Note: If an access point is not present in multiple homogeneous ESS's, the HESSID is identical for all of its interfaces.
Telnet path:
Setup > WLAN-Management > AP-Configuration > IEEE802.11u > Network-Profiles
Possible values:
MAC address in capital letters and without separators
Default:
000000000000