topic Re: High latency for wireless clients in Wireless

High latency for wireless clients

Abdulaziz Loonat — Wed, 12 Mar 2025 16:06:28 GMT

This is one of them open questions and probably not a simple answer

AP's are MR56 and noticed alot of users complaing about wireless performance.

Looking at the clients performance on the dashbooard the latency is around 700 ms, however the number of clients connected to the access point is about 30 which to me isnt that high and wouldnt expect high latency.

I cross referenced the high latency for the device to the AP and no high latency recorded on the AP at the time the client recorded an high latency.

I also checked for channel collision and the other AP's on the same floor are using different channel. We only broadcast the SSID on 5 Ghz

What is common reasons for high latency

Re: High latency for wireless clients

inderdeepsingh1 — Wed, 12 Mar 2025 16:09:02 GMT

You should check this one

https://documentation.meraki.com/Architectures_and_Best_Practices/Cisco_Meraki_Best_Practice_Design/Best_Practice_Design_-_MR_Wireless/High_Density_Wi-Fi_Deployments

Re: High latency for wireless clients

aleabrahao — Wed, 12 Mar 2025 16:49:12 GMT

30 connected clients, which is a considerable number depending on the type of traffic they are consuming, could be one of the explanations.

Take a look at the troubleshooting you can do.

https://documentation.meraki.com/MR/Wireless_Troubleshooting/Wireless_Issue_Resolution_Guide

https://documentation.meraki.com/MR/Wi-Fi_Basics_and_Best_Practices/Tools_for_Troubleshooting_Poor_Wireless_Performance

Re: High latency for wireless clients

michalc1 — Wed, 12 Mar 2025 17:35:08 GMT

Interesting issue you have there. I have couple of questions that might help you with finding the solution:

How many SSIDs are configured on the AP's?
Do all of the clients experience the same issue on all of the SSIDs?
Is there any common denominator between the clients? (perhaps same laptop with same wireless adapter driver)
Is there a Mac device that experience the issue? It would be great to check the RSSI, Noise, TX Rate and MCS index. This could be done pressing the "Command" + WiFi symbol on Mac.
Do one of the clients use an excessive bandwith compared to others?
- Have you tried setting up a bandwith limit per client on the SSID?
Do you have default traffic shaping rules applied on the SSID?
Do you see an excessive broadcast or multicast traffic while the issue occurs?
Are your AP's up to date?

Re: High latency for wireless clients

Abdulaziz Loonat — Wed, 12 Mar 2025 18:56:48 GMT

answer you your questions

How many SSIDs are configured on the AP's? 3 SSID - 1 Corporate SSID on 5Ghz and 2 SSID's on 2.4 Ghz - all laptops with latency issue connect to the 5Ghz band
Do all of the clients experience the same issue on all of the SSIDs? - so far only 4 people have mentioned it, so can assume others may experience some issue but not said anything
Is there any common denominator between the clients? (perhaps same laptop with same wireless adapter driver) Laptops are Thinkpads - around 2 years old either running the Intel AX201 or AX211 wireless chipset
Is there a Mac device that experience the issue? It would be great to check the RSSI, Noise, TX Rate and MCS index. This could be done pressing the "Command" + WiFi symbol on Mac. - No Mac devices
Do one of the clients use an excessive bandwith compared to others? - not that I am aware of, majority of traffic would be outlook and Teams
- Have you tried setting up a bandwith limit per client on the SSID? - no
Do you have default traffic shaping rules applied on the SSID? - yes default traffic shaping
Do you see an excessive broadcast or multicast traffic while the issue occurs? - not that I am aware of, issue mostly occur in Teams call
Are your AP's up to date? AP running firmware that we applied late last year, I am aware a new firmware was released this month so plan on applying to all AP's

Re: High latency for wireless clients

Philip D'Ath — Wed, 12 Mar 2025 19:13:21 GMT

Have you set the minimum bitrate on the 5Ghz band to 12Mb/s or higher?

Re: High latency for wireless clients

Philip D'Ath — Wed, 12 Mar 2025 19:14:44 GMT

Does Wireless Health report anything interesting?

https://documentation.meraki.com/General_Administration/Cross-Platform_Content/Meraki_Health_Overview

Does the issue exist when there are less people on the WiFi? Aka, does the issue always exist, or only when a lot of people are using it?

Re: High latency for wireless clients

Abdulaziz Loonat — Wed, 12 Mar 2025 19:28:57 GMT

currently set to minimum bitrate 18 Mb/s

Re: High latency for wireless clients

Abdulaziz Loonat — Wed, 12 Mar 2025 19:31:08 GMT

Health status for the AP where users have high latency is good, this is the confusing bit to me, latency from AP is good where as latency from client is high.

I suspect issue is probably due to number of devices connected, however in my opinion 30 people connected to an AP isnt classed as high.

Re: High latency for wireless clients

Philip D'Ath — Wed, 12 Mar 2025 19:34:38 GMT

>latency from client is high

This smells like client power savings. What kind of device is this?
Does it happen when the client is plugged into the mains?

If this is affecting Windows hosts you can usually disable WiFi power savings with these commands:

powercfg /SETDCVALUEINDEX SCHEME_CURRENT 19cbb8fa-5279-450e-9fac-8a3d5fedd0c1 12bbebe6-58d6-4636-95bb-3217ef867c1a 0
powercfg /SETACVALUEINDEX SCHEME_CURRENT 19cbb8fa-5279-450e-9fac-8a3d5fedd0c1 12bbebe6-58d6-4636-95bb-3217ef867c1a 0

Re: High latency for wireless clients

Abdulaziz Loonat — Wed, 12 Mar 2025 19:37:23 GMT

These are all Thinkpad laptops running Windows 10/11.

Not sure if they are plugged in not. I will need to ask the user.

Re: High latency for wireless clients

Abdulaziz Loonat — Wed, 12 Mar 2025 19:46:42 GMT

This is what confused me, this is one of the client with the high latency issue - the peak is around 700 ms 2.35 pm today

Now for the AP the client was connected to, the latency around the same time is much lower. At 2.25pm today the latency on the AP was 6ms

Unless I am misreading the graphs on the dashboard, but I would expect the latency to be same/similair on the dashboard for AP and client

Re: High latency for wireless clients

CMR — Wed, 12 Mar 2025 21:11:45 GMT

Is it 30 clients connected to the SSID on 5GHz or 30 clients connected across the three SSIDs that are on a mix of 2.4GHz and 5GHz?

The per radio recommended limit for a good wireless voice experience is 10 devices, so you might just be experiencing that.

Re: High latency for wireless clients

Abdulaziz Loonat — Thu, 13 Mar 2025 09:06:42 GMT

the 30 client are only on the 5Ghz, no clients connected to the 2.4 Ghz

Re: High latency for wireless clients

CMR — Thu, 13 Mar 2025 09:13:49 GMT

@Abdulaziz Loonat are the 30 clients all on one MR56, or spread across many?

If all on one, 30 clients per radio is the maximum recommended for a good data experience. If you are using Teams video/voice then that many clients is highly likely to cause quality issues.

If across a number of MR56s with no more than 10 per AP then you should not be seeing issues.

Re: High latency for wireless clients

Abdulaziz Loonat — Thu, 10 Apr 2025 10:35:32 GMT

I am planning on updating the firmware today so will see if this improved the latency issue.

Re: High latency for wireless clients

Abdulaziz Loonat — Tue, 29 Apr 2025 10:04:38 GMT

I upgraded the firmware and still expereince high latency on client side. I did ask and majority of laptops are not running on battery.

Re: High latency for wireless clients

janjooa — Sun, 18 May 2025 17:41:54 GMT

We have the same issue 10 people in Teams latest firmware MR56 and latency hits 1000MS++

We are using HP laptops windows 10+11 and AXE211 WNICs with latest drivers

Channel52 on the 5GHz band. We have had to call in external specialist to help now.

Meraki support isn't very good with helping on this issue

Re: High latency for wireless clients

LittleRich — Wed, 09 Jul 2025 12:21:43 GMT

Did the external specialist pin point anything? I am having the same issues with high latency.