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MikroTik App
 
gotsprings
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2.4 4-way handshake timeout

Sat May 25, 2019 5:47 pm

This seems to have come back on me.

Router OS is 6.44.3 on hEX and cAP AC
devices on the 2.4 radio are disconnecting from the wifi. Log into the router and check the logs and see...
(MAC of Devices) disconnect 4-way handshake timeout

Devices on 5Gig radio do not show this error.

Last time I reported this, support would send me one email per month... I removed the Tik Wireless and Went to Ruckus and stopped getting angry calls.

MIKROTIK SUPPORT...
I just submitted a support file via email. Please take a look at it and figure out what is wrong.
 
gotsprings
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Re: 2.4 4-way handshake timeout

Sun May 26, 2019 10:58 am

Took cAP out of caps-mode.
Same result. Well sort of. Log file showed unicast key time out.

Went back to caps mode and added an unencrypted SSID. Devices connected for about 10 seconds. Then I got a disconnected for extensive data loss.

Looked up several old posts tagged with extensive data loss. They all pointed to "interference".

Changed the 2.4 channel between 1 6 and 11 and all had the same result.

Changed 2.4 channel to auto... cAP chose channel 3. Devices connected. One device still showed 4 way hand shake time out after reading the encryption... But 5 devices do connect to 2.4. During the whole problem... I could not get a client to connect to 2.4 at all.

Mikrotik wireless is coming out Tuesday. Will be trying the Ruckus R510 in the same spot.
 
gotsprings
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Re: 2.4 4-way handshake timeout

Sun Jun 02, 2019 11:36 pm

Still nothing from support.
 
BRMateus2
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Re: 2.4 4-way handshake timeout

Mon Jun 03, 2019 3:50 am

Did the Ruckus work? I've never seem something like this, are you sure there is no jammer nearby? Jammers don't show in any of the WiFi protocol scans.
 
gotsprings
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Re: 2.4 4-way handshake timeout

Tue Jun 04, 2019 8:23 pm

Did the Ruckus work? I've never seem something like this, are you sure there is no jammer nearby? Jammers don't show in any of the WiFi protocol scans.
I struggle to recall an install in the last 10 years that it hasn't.
 
gotsprings
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Re: 2.4 4-way handshake timeout

Wed Jun 05, 2019 3:11 pm

For anyone keeping score... Still no email from Mikrotik support.
 
gotsprings
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Re: 2.4 4-way handshake timeout

Mon Jun 10, 2019 1:02 pm

Got email from Mikrotik. Explained the problem and how to reproduce it.

They did... And don't currently have a fix.

So high density with interference... If you see 4-way handshake time out in Caps-man...

Don't fight it. Don't mess with support. Just buy the Ruckus radio and move on.
 
ivicask
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Re: 2.4 4-way handshake timeout

Tue Jun 11, 2019 2:47 pm

Got email from Mikrotik. Explained the problem and how to reproduce it.

They did... And don't currently have a fix.

So high density with interference... If you see 4-way handshake time out in Caps-man...

Don't fight it. Don't mess with support. Just buy the Ruckus radio and move on.
I get those also with capsman, after changing some stuff and channels it got reduced, but still get them daily.
 
zaza355N
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Re: 2.4 4-way handshake timeout

Thu Jun 13, 2019 1:03 am

I had exactly the same story on a big event with 12 sxt sq lite 2, it was awe full, i tried basically everything, for 5 hours, then i just moved to another brand then it worked...
I was also using CAPsMAN.

I am interested to know why that can happen

Thank you
 
gotsprings
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Re: 2.4 4-way handshake timeout

Thu Jun 13, 2019 5:53 am

I had exactly the same story on a big event with 12 sxt sq lite 2, it was awe full, i tried basically everything, for 5 hours, then i just moved to another brand then it worked...
I was also using CAPsMAN.

I am interested to know why that can happen

Thank you
Because some vendors can deal with interference better than others.

I watched a YouTube video linked by Mikrotik. A "respected expert" talked all about frequencies and airtime and "when it's out of space, it's out of space."

I call B--lshit!

I have seen "UniF--k" crumble under the same sort of stress.

But an 8 year old Ruckus systems "cuts right through it."
 
gotsprings
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Re: 2.4 4-way handshake timeout

Mon Jul 01, 2019 1:44 pm

Amazon seems to have a steady flow of Ruckus at ~50% off retail.
 
gotsprings
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Re: 2.4 4-way handshake timeout

Fri Aug 23, 2019 1:40 pm

Tech in the field (related to owner, so I was out ranked) insisted on putting in the cap AC he had in his truck.

In the days since. Customer has been pounding him with complaints for the last week. Calling everyday. We get into the configuration and try to adjust things... But this is another site where it's just not going to work.

They have a Ruckus on one building and it has no problems at all. Where client devices transitions to the Tik wireless that "are in less important spots" (yeah... That was the excuse for adding in the Tiks where the Ruckus works) is proving a disaster.

70 bucks vs 270 bucks... I see why he tried it. But that 200 dollars cost us the customers confidence. Will probably have to take out everything, as they will likely not let us change out just the wireless.
 
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inteq
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Re: 2.4 4-way handshake timeout

Sat Feb 06, 2021 6:44 pm

Don't fight it. Don't mess with support. Just buy the Ruckus radio and move on.
U R funny. Check https://forums.ruckuswireless.com/conve ... e247913632
 
gotsprings
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Re: 2.4 4-way handshake timeout

Sun Feb 07, 2021 3:49 am

I was really hilarious when I got one email per month, for 4 months, as my clients would not connect from Mikrotik support.

I had a dozen installs with the same problem that Mikrotik flat out told me... "It's your environment."

Stopped using Mikrotik wireless and my problems went away instantly.
 
ChuckieTodd
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Re: 2.4 4-way handshake timeout

Sun May 16, 2021 12:04 am

I had issues with this as well. Turns out, my client device was attempting to connect with the wrong passphrase.
 
gotsprings
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Re: 2.4 4-way handshake timeout

Sun May 16, 2021 6:17 am

I had issues with this as well. Turns out, my client device was attempting to connect with the wrong passphrase.
Just to piss off the owner of the company... I sat on a site with them and demonstrated.

Put the client device password in.
Connected to the 5Ghz radio. Unit stayed connected.
Cut off the 5Ghz radio and enabled the 2.4 radio. Some devices connected but most didn't.

Didn't change ANYTHING but the manufacturer...

R510... All devices connected.
Cut off 2.4. devices that could moved to 5.
Cut off 5 and 2.4 back on... All clients connected and stayed connected.

I have not had to configure a cap install since.
 
nellson
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Re: 2.4 4-way handshake timeout

Fri Oct 08, 2021 11:46 am

We recently just saw the same logs:

(68:94:23:45:02:A8@2G-WAP001-1 disconnected, 4-way handshake timeout)

The site had little to no interference, we set up a new capsman install with wAP AC APs, previously there was an older ubiquiti AP configured with the same SSID and security settings.

This led me to believe that issue had nothing to do with the environment. The clients that had the problem, were wireless printers, with some Hon hai WiFi chipset. The 4-way handshake timeout issues were all resolved by deleting the wireless config from the printers and setting them up again.
 
gotsprings
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Re: 2.4 4-way handshake timeout

Wed Jul 13, 2022 10:55 pm

Well that will teach me...

Audience Running 7.4rc2

15:46:48 wireless,info 00:80:F0:A2:AD:BF@2.4 connected, signal strength -94
15:46:55 wireless,info 00:80:F0:A2:AD:BF@2.4 disconnected, key handshake timeout, signal strength -95
15:48:22 wireless,info 00:80:F0:A2:AD:BF@2.4 connected, signal strength -98
15:48:28 wireless,info 00:80:F0:A2:AD:BF@2.4 disconnected, key handshake timeout, signal strength -95
15:49:23 wireless,info 00:80:F0:A2:AD:BF@2.4 connected, signal strength -64
15:49:30 wireless,info 00:80:F0:A2:AD:BE@2.4 connected, signal strength -65
15:49:49 wireless,info 00:80:F0:A2:AD:BF@2.4 disconnected, group key timeout, signal strength -57

Plugging the Netgear back in.
 
Volsh
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Re: 2.4 4-way handshake timeout

Fri Oct 28, 2022 10:02 am

I have 2 RBcAPGi-5acD2nD, which are managed through capsman, but from different release batches. There was also a problem with 4-way handshake timeout after the channel setting handle on one of the access points.
Some devices connected normally, some did not switch from one point to the problem one and did not want to immediately connect to the problem point.
After a long search, I came across the Keenetic forum, where this problem was solved by disabling MU-MIMO and other things.
On my points in "current rate set" & "current basic rate set" the values ​​did not match completely.
The problem was solved only after I put the problem point in the country "Germany", it selected the channel automatically and the "current basic rate set" equaled at both points on OFDM: 6. I did not touch the other point after that.

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