Everything Instant On

Use of DHCP option-12 in AIO

  • 1.  Use of DHCP option-12 in AIO

    Posted 12-10-2019 11:51 PM
    • Instant ON APs can now set their inventory name as the hostname in the DHCP requests.
    • The configured inventory name is set as "hostname" under option-12 of the DHCP DISCOVER Packet.
    • This allows an administrator to better identify a device on the DHCP server.
    • The characters in the DHCP option is more limited than the device name in the UI (APP and the portal).
    • The maximum number of characters supported for the hostname is 32.
    • Colons and dashes are automatically converted to “dashes”(-).

     

    • Configured the device name as “AP:12:LAB” from the Mobile Application.

    Untitled-1.png

    • From the Uplink capture, we can see that the colons are replaced with dashes and the AP name is referred to “AP-12-LAB”.apture-1.JPG
    • The hostname gets updated in the switch LLDP information.Capture-2.PNG

       

    • If there are more special characters mentioned in the AP’s hostname then the AP’s serial number is set as the hostname in the DHCP option-12.
    • Configured the device name as “&@&&)@” from the Mobile Application.Untitled.png

       

    • From the Uplink capture, we can see that the AP name is referred to  “CNHVJSSBCG”.
      Capture-3.JPG

       

    • The hostname gets updated in the switch LLDP information.Capture-4.PNG

       

     


    #Hostname
    #DHCP
    #AIO
    #ArubaInstantOn