topic Re: 9120 AP not joining Controller in Software-Defined Access (SD-Access)

9120 AP not joining Controller

HAT — Sat, 13 May 2023 10:57:00 GMT

Hi All ,

I m in the process of deploying a SDA based Wifi solution .This will consist of a typical SDA setup with Fabric Edge node ( where APs are connecting to ) > Border and Control plane node and Fusion router managed by DNAC.

A virtual wireless controller ( C9800-CL ) has been successfully installed on VMware ESXI and added to the site fabric. Routing is fine from edge router all the way to the shared services ( DHCP Server , DNS ) .

The SSIDs and network profiles for the site have been successfully configured on DNAC and working as expected for other fabrics . The DCHP is also set up with an AP Vlan pointing at the Wireless controller via Option 43 .

Upon logging into the WLC GUI I can observe that the SSIDs have been picked up as you would expect .

However upon connecting the AP to the edge node , the AP is not able to join the controller . I can confirm I have had to configure the WLC with an AP certificate , apparently this is a requirement for 9800-CL as opposed to physical devices that ship with it .

Any idea of where I m getting it wrong ?

Any help would be greatly appreciated and thanks in advance .

Re: 9120 AP not joining Controller

Flavio Miranda — Sat, 13 May 2023 11:38:43 GMT

Let´s start for the basic. Does the WLC have the right date and time, this is very critical for certificates.

Re: 9120 AP not joining Controller

Andrii Oliinyk — Sat, 13 May 2023 14:25:34 GMT

i'd advise 1st to follow instructions given here: Troubleshoot Catalyst 9800 AP Join or Disconnection Issues Flow - Cisco

Re: 9120 AP not joining Controller

Leo Laohoo — Sat, 13 May 2023 16:14:03 GMT

At the back of the AP is a sticker (or plate) that has the serial number of the AP. In that same plate is the Date of Manufacture. Does the AP have a Date of Manufacture of September 2022 (and later)?

If it does, then the issue is due to FN - 72424 - Later Versions of Some Wi-Fi 6 Access Points Fail to Join the WLAN Controller.

Re: 9120 AP not joining Controller

HAT — Mon, 15 May 2023 10:34:36 GMT

Hi . Thank for the reply . Yes the time is correct . This is being synchronized with our NTP server via DNAC

Re: 9120 AP not joining Controller

HAT — Mon, 15 May 2023 10:35:27 GMT

Thanks for the link , I look into it

Re: 9120 AP not joining Controller

HAT — Mon, 15 May 2023 10:36:44 GMT

I will check this out

Re: 9120 AP not joining Controller

HAT — Wed, 12 Jul 2023 09:02:10 GMT

Hi All

The issue was around DNAC version being incompatible with the APs model . Once we upgraded DNAC the APs were successfully discovered .

Thanks all for your time and assistance