If you had two controllers that share a VRRP and are configured independently, the second controller would take over for the first controller, as long as it is running the same version of ArubaOS and the Ap-group of the APs exist on both controllers, and the lms-ip for that Ap-group is pointing at the VRRP. I am not sure how common this is, but that is how it would work. You do not need any special connection between both controllers for the second controller to allow APS to attach and service clients. The configuration just needs to be the same on both controllers.
------------------------------
Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.
HPE Design and Deploy Guides:
https://community.arubanetworks.com/support/migrated-knowledge-base?attachments=&communitykey=dcc83c62-1a3a-4dd8-94dc-92968ea6fff1&pageindex=0&pagesize=12&search=&sort=most_recent&viewtype=card------------------------------
Original Message:
Sent: Mar 12, 2023 09:39 AM
From: afedeli
Subject: Introducing a backup standalone controller in aos 8
Hello,
my customer has an aruba 7010 standalone with 16 APs.
Now they want to introduce a second standalone controller for HA and, reading various thread, i can see that there could be some problems depending on where the configuration has been made in the hierarchy of the standalone controller.
So what would be the correct procedure to introduce a backup standalone WLC if the configuration has been set at the wrong level in the primary standalone config hierarchy?