topic Re: Wireless AP's preferring VM controller over Local 9800 in Wireless

Wireless AP's preferring VM controller over Local 9800

RGilbert — Mon, 05 Jul 2021 20:10:58 GMT

Option 43 is what we are using to join. All of my access points are joining the VM WLC and not the local. Could it be a route issue? The new controller and the VM have IP's in same subnet. Just curious if it is a shorter path for the AP's and they are getting to VM "first". this is a large upgrade and would love not to kick the AP's one at a time.

Re: Wireless AP's preferring VM controller over Local 9800

Mark Elsen — Mon, 19 Apr 2021 15:07:49 GMT

- This configuration is not recommended , you should only have the 9800 in the particular same subnet as the AP's

Re: Wireless AP's preferring VM controller over Local 9800

RGilbert — Mon, 19 Apr 2021 15:21:21 GMT

They are. Are you saying they should be the only WLC's the AP's can join?

Re: Wireless AP's preferring VM controller over Local 9800

Mark Elsen — Mon, 19 Apr 2021 15:43:00 GMT

- No I am saying that the vwlc should not be in that same subnet too.

Re: Wireless AP's preferring VM controller over Local 9800

Scott Fella — Mon, 19 Apr 2021 17:20:08 GMT

If aps are joining the wrong controller, you need to re-look at how you are doing a discovery. I can have multiple controllers in various locations, but I can also help aps discover the right controller. You can also console into an ap to see how it is discovering the wrong controller and remediate that. Maybe option 43 is not created/working properly and the AP’s has discovered the controller through DNS or maybe local broadcast, don’t know. However, you need to determine how your aps are discovering the controller first.

Re: Wireless AP's preferring VM controller over Local 9800

RGilbert — Mon, 19 Apr 2021 17:54:10 GMT

Thanks Scott, we had the WLC's in parallel during change and AP's kept joining VM. Manually kicking over 100 is a little annoying. I will be getting this together and will let the forum know what I see. Thank you again.

Re: Wireless AP's preferring VM controller over Local 9800

Scott Fella — Tue, 20 Apr 2021 04:18:07 GMT

When you bring up controllers, it’s always best to make sure you define the high availability for each access point. This way the ap knows which one it should join. Later on, you just reconfigure the AP’s high availability to move the ap to the other controller. I use this method almost 100% of the time. You can build a script to send the commands via cli which makes it easy.