Client disconnection issue in specific WLAN
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11-04-2024 09:08 AM
Hello Professionals,
I'm having an client wireless issue for bad wifi quality and here's status:
# WLC: 9800 / AP: 2802E
1. SSID: VENDOR (Macfiltering + PSK)
2. SSID: IT (Macfiltering + PSK)
In same place, two laptops are connected SSID: VENDOR / SSID: IT respectively.
Both laptops are joined conference meeting (MS Teams) over the same AP.
However, one of laptop irregularly disconnect the network and comeback after 6-11 ping loss. This laptop is connected to 'VENDOR'. Below screenshot is worst disconnected status.
The WLAN configurations are identical for both SSID.
I cannot find the difference which makes ping loss.
Which part should I look at?
Thank you for your time.
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Wireless LAN Controller
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11-04-2024 09:45 AM
- Can start by having 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#anc5
and check if any of these commands can bring insights.
For a detailed observation engage in full client debugging according to https://logadvisor.cisco.com/logadvisor/wireless/9800/9800ClientConnectivity , these debugs can be analyzed with Wireless Debug Analyzer
+ Have a checkup of the 9800 WLC configuration with the CLI command show tech wireless and feed the output to : Wireless Config Analyzer
(do not use a simple 'show tech' for the above procedure)
- What software version are you using on the 9800 ?
M.
-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '
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11-04-2024 10:33 AM - edited 11-04-2024 10:33 AM
Start by looking the laptop adapter. Check the driver, make sure they are up to date. Always prefer intel adapter. Qualcomm is terrible.
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11-05-2024 05:13 PM
Make sure laptop network drivers are fully up to date. For Intel refer to:
https://www.intel.com/content/www/us/en/download/19351/intel-wireless-wi-fi-drivers-for-windows-10-and-windows-11.html
Check that WLC software is up to date as per TAC recommended link below.
Please click Helpful if this post helped you and Select as Solution (drop down menu at top right of this reply) if this answered your query.
------------------------------
TAC recommended codes for AireOS WLC's and TAC recommended codes for 9800 WLC's
Best Practices for AireOS WLC's, Best Practices for 9800 WLC's and Cisco Wireless compatibility matrix
Check your 9800 WLC config with Wireless Config Analyzer using "show tech wireless" output or "config paging disable" then "show run-config" output on AireOS and use Wireless Debug Analyzer to analyze your WLC client debugs
Field Notice: FN63942 APs and WLCs Fail to Create CAPWAP Connections Due to Certificate Expiration
Field Notice: FN72424 Later Versions of WiFi 6 APs Fail to Join WLC - Software Upgrade Required
Field Notice: FN72524 IOS APs stuck in downloading state after 4 Dec 2022 due to Certificate Expired
- Fixed in 8.10.196.0, latest 9800 releases, 8.5.182.12 (8.5.182.13 for 3504) and 8.5.182.109 (IRCM, 8.5.182.111 for 3504)
Field Notice: FN70479 AP Fails to Join or Joins with 1 Radio due to Country Mismatch, RMA needed
How to avoid boot loop due to corrupted image on Wave 2 and Catalyst 11ax Access Points (CSCvx32806)
Field Notice: FN74035 - Wave2 APs DFS May Not Detect Radar After Channel Availability Check Time
Leo's list of bugs affecting 2800/3800/4800/1560 APs
Default AP console baud rate from 17.12.x is 115200 - introduced by CSCwe88390
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11-05-2024 09:23 PM
Dear,
You can connect that laptop to other SSID if you were allowed to do so, and check weather the issue persist. If you find same issue then check the laptop for any updates pending in it. Also check WiFi adapter's advance setting for any out dated setting is selected or transmit power also roaming aggressiveness in it. Try to tweak those settings.
Regards
Gaurav Kansal
Please mark this as solution if it helps to resolve your issue. Also please click on helpful if you find it helpful.
