Wireless Access

last person joined: 2 hours ago 

Access network design for branch, remote, outdoor and campus locations with Aruba access points, and mobility controllers.
Expand all | Collapse all

DHCP Option 43

This thread has been viewed 26 times
  • 1.  DHCP Option 43

    Posted Jul 12, 2021 11:45 AM
    Hello everybody,

    Im wondering, how can I let modern AP´s (like 570) series discover my WIFI Controller. Setting DHCP Option 43, like in the following example:

    option serverip code 43 = ip-address;

    class "vendor-class" {

          match option vendor-class-identifier;


    subclass "vendor-class" "ArubaInstantAP" {

          option vendor-class-identifier "ArubaInstantAP";

       option serverip;


    is not giving any result even if option serverip  is send out to the AP (as I can see in TCPDUMP). Is there any additional setting I have to add to my dhcp configuration or is it mandatory to use Airwave or ArubaActivate to provision the AP´s.

    Thanks for helping me out

    Maik Maier

  • 2.  RE: DHCP Option 43

    Posted Jul 12, 2021 01:35 PM
    Please take a look at this:  https://www.arubanetworks.com/techdocs/ArubaOS_8.7.1_Web_Help/Content/arubaos-solutions/dhcp-option43/dhcp-vend-spec-opti.htm?Highlight=dhcp%20option

    Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.

  • 3.  RE: DHCP Option 43

    Posted Jul 14, 2021 02:51 PM

    thanks for the link. Unfortunately it was more or less the same configuration which I already had and didn't solved my issue. Just in case somebody else is facing a similar issue, https://community.arubanetworks.com/community-home/digestviewer/viewthread?MID=25228 has the answer.

    Maik Maier

  • 4.  RE: DHCP Option 43

    Posted Jul 15, 2021 03:44 AM
    Check environmnet variables in your AP with

    show ap-env

    If you see something like:


    then IAP will not search for controller.

    Also Option 60 need to be ArubaAP for DHCP controller discovery to work.

    Best, Gorazd

    Gorazd Kikelj