05-14-2025 12:24 AM
Hi,
we have 9166 series AP on 9800 WLC.
AP having 2 Radios for 5 ghz - slot 1 and slot 2.
Slot 1 is operational, Slot 2 is kept disabled.
Slot 1 is not getting assigned DFS channels 100–144 and 149–165. Channel assignment setting is Auto. On manual seting also DFS channels are not showing.
Country code is IN.
Can somebody help on this. SLot 2 is disabled, we want slot 1 should get assigned channels from channels 100–144 and 149–165.
Solved! Go to Solution.
05-14-2025 02:19 AM
You are hitting CSCwj24926. Fixed in 17.12.5.
05-26-2025 02:13 AM
Thank you, Saikat.
Updating IOS fixed the issue. able to see both DFS and NON DFS channels over an Radio now.
05-14-2025 01:52 AM
- Note that when a DFS channel is selected for an AP radio, the AP radio scans the channel to check for any radar signals before transmitting any frames in the DFS frequency.
For instance have a look at https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/217738-monitor-catalyst-9800-kpis-key-performa.html#toc-hId--940480618
You could probably get extra insight with enabling 'global' logging for both the APs and the
9800 controller.
Ref : https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/config-guide/b_wl_16_10_cg/enabling-syslog-messages-in-access-points-and-controller-for-syslog-server.html
Subsequently check logs when tweaking your settings
M.
05-14-2025 02:09 AM
Hi Marce,
Thanks for your inputs.
when i enable Slot 2 of 5 GHz Radio, it gets an channel from DFS channel.
however no AP on Slot1 gets channel assigned from 100–144 and 149–165.
05-14-2025 02:14 AM
- Use the logging settings I referred to ,to get further insights,
M.
05-14-2025 02:19 AM
You are hitting CSCwj24926. Fixed in 17.12.5.
05-14-2025 02:41 AM
Thanks a lot, Saikat !! Will plan this in maintenance window and will share observation with you.
Always pleasure to work with you over TAC cases, training at CISCO Bangalore and now here on cisco community page.
05-26-2025 02:13 AM
Thank you, Saikat.
Updating IOS fixed the issue. able to see both DFS and NON DFS channels over an Radio now.
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide