Aironet 1850i random disconnect

[gino0o0o]

Hi all,

I have some issue with a Aironet 1850i connected to a RV345 router. The access point is powered-on by the external POE adapter. During the day, the Wifi disconnect randomly with no sense. The connection is still on, but with no internet access. We check when is occours, that the internet not goes down, infact any of the PC wired connected to the router is still connected to the internet. We have about 5 laptops and 5 smartphone Wifi connected, and all the device suffers the same issue.

I have tried to reset the Access Point and create only 1 WLan, and we have the same issue. 

Any idea or suggestion?

[Rich R]

Is it a ME (Mobility Express) AP?
What version of software is it running?
What do the AP logs show?
Have you done any debugs on the AP?

[gino0o0o]

The access point is in ME mode.

The software version is 8.5.131.0.

I don't have any Logging server configured.

[Rich R]

- Upgrade to 8.5.161.0 https://software.cisco.com/download/home/286285803/type/286289839/release/8.5.161.0
- Doesn't matter if you have a logging server - there will always be logs on the ME AP itself - check that.
- If there isn't anything useful in the logs then enable debugs
- If you're still stuck open a TAC case for troubleshooting assistance from Cisco.

[gino0o0o]

- I can't download this update because I don't have any contract associated to my account.
- There are no logging options in my AP.

[Rich R]

https://www.cisco.com/c/en/us/td/docs/wireless/access_point/mob_exp/83/cmd-ref/me_cr_book/me_sys_mgmt_cli.html#wp2817990753
Are you *sure* you don't have a "show traplog" command (it's been there since 8.3)?

[gino0o0o]

I don’t see this command in the web admin panel. Tomorrow I will try to SSH connect e verify this command.

I notice that i need to disconnect and reconnect to have Wifi working again. Il takes about 10/15 seconds.

[gino0o0o]

I'm connected to the AP via SSH and run the "show traplog". This is the result:

(Cisco Controller) >show traplog

Number of Traps Since Last Reset ............ 85
Number of Traps Since Log Last Displayed .... 1

Client Traps Statistics

Client Association Traps .................... 0
Client Disassociation Traps ................. 0
Client Authentication Traps ................. 0
Client Deauthentication Traps ............... 0
Client Association Fail Traps ............... 0
Client Authnetication Fail Traps ............ 0
Station Authnetication Fail Traps ........... 0
Client Excluded Traps ....................... 0
Client Static IP Fail Traps ................. 0
Association Fail Traps ...................... 0
Associate Fail Traps ........................ 0
Client Association Data Stats Traps ......... 0
Client Disassociation Data Stats Traps ...... 0
Client Association NAC Alert Traps .......... 0
Client Web Auth User Login Traps ............ 0
Client Web Auth User Logout Traps ........... 0

--More-- or (q)uit
Client Enhanced Traps Sent Since Reset ............. 0
Client Association Enhanced Traps .................. 0
Client Association Enhanced Traps Send Fail ........ 0
Client Deauthentication Enhanced Traps ............. 0
Client Deauthentication Enhanced Traps Send Fail ... 0
Client Authentication Enhanced Traps ............... 0
Client Authentication Enhanced Traps Send Fail ..... 0
Client Stats Enhanced Traps ........................ 0
Client Stats Enhanced Traps Send Fail .............. 0

AP Traps Statistics

AP Interface Up Traps ............. 16
AP Interface Down Traps ........... 6
AP Associated Traps ............... 8
AP Disassociated Traps ............ 3

Log System Time Trap
--- ------------------------ -------------------------------------------------
0 Tue Jun 23 09:22:26 2020 AAA Authentication Failure for Client MAC: 06:00:
00:00:00:00 UserName:cisco User Type: MGMT USER
Reason: Authentication failed
1 Tue Jun 23 09:14:16 2020 Rogue AP : 54:d0:b4:0d:f9:48 removed from Base R

--More-- or (q)uit
adio MAC : 2c:73:a0:0f:e1:80 Interface no:0(802.1
1n(2.4 GHz))
2 Tue Jun 23 08:47:27 2020 Rogue AP: 54:d0:b4:0d:f9:48 detected on Base Radi
o MAC: 2c:73:a0:0f:e1:80 Interface no: 0(802.11n(
2.4 GHz)) Channel: 1 RSSI: -64 SNR: 23 Classifica
tion: unclassified, State: Alert, RuleClassified
: N, Severity Score: 0, RuleName: N.A. ,Classifie
d AP MAC: 00:00:00:00:00:00 ,Classified RSSI: 0
3 Tue Jun 23 08:39:26 2020 Rogue client: cc:66:0a:3b:15:45 is detected by 1
APs Rogue Client Bssid: 98:de:d0:4a:19:7f, State:
Alert, Last detecting AP :2c:73:a0:0f:e1:80 Rogue
Client gateway mac 98:de:d0:4a:19:7f.

[Rich R]

Well you haven't mentioned whether any of those MAC addresses are relevant to you but I'm guessing they probably are. Do you need to detect/ban rogues? If not disable your rogue policies - no action to be taken - otherwise you'll need to tune the policies to suit your network..
https://www.cisco.com/c/en/us/td/docs/wireless/access_point/mob_exp/1/best_practices/b_ME_Best_Practices_Guide/security.html
https://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/112045-handling-rogue-cuwn-00.html
https://www.cisco.com/c/en/us/td/docs/wireless/access_point/mob_exp/86/user_guide/b_ME_User_Guide_86/monitor.html#task_E1C22FDBED6445E2B347FDA6602F73C2

[gino0o0o]

Thanks for the info.

I checked the status, and no rogue policies or AP was found. I noticed many client association failure in the AP client performance tab in the Web Gui.

[gino0o0o]

After some days of logging and debugging no solutions is found. The wifi seem to timeout after a certain amount of time (20 min approximately).

What can I do?