Fighting this issue in my district as well. I have schools running 315s and others running 515s, the issue seems isolated to the 515s. We've been running 8.10.0.6 code just fine, and staff could screencast without issue while also having stable internet connetion. After upgrading to 8.10.0.9, once you screencast the wireless connection goes to trash and is very intermittent (slow to laggy internet browsing, dropped pings, etc). As soon as you disconnect from screen sharing, the issues go away. After downgrading schools back to 8.10.0.6, no more complaints from staff. Trying to get a case opened now.
Original Message:
Sent: Jan 04, 2024 10:01 AM
From: DCS Technology - K-12 Edu
Subject: Aruba upgrade causes Miracast projection failures
With the way Miracast operates and it really hating DFS channels, I am convinced this is it. I think 2.4Ghz just doesn't offer enough bandwidth for newer radios and then you add on trying to run a Miracast session at the same time and latency kicks in. Though it should play nice with 2.4Ghz, I think to much surrounding traffic and nature of "streaming" being bandwidth hungry, just adds to it. Also I do not think that the Miracat protocol is all that efficient in how it operates.
Staff have been teaching/testing sense before break and now after and all issues related to speed have gone away. It is worth trying...
Also other settings that were tweaked by Aruba support in the hope of fixing this, I turned back off, so maybe you had already played with these and want to turn off as well:
Under the the WLAN name (each has settings of its own), I turned off:
Multicast Transmission Optimization and Dynamic Multicast Optimization (DMO)
Original Message:
Sent: Dec 25, 2023 08:58 AM
From: Dawid Skaznik
Subject: Aruba upgrade causes Miracast projection failures
Hey,
I wish you a merry Christmas and thanks a lot for posting your progress. I was sick and not able to try it out and definitely will do next year. But I also have the issues with 2.4 GHz. The students' access runs on 2,4 the teachers'' on 5 GHz and as soon as I connected to miracast, the internet slowed down on both accesses.
Original Message:
Sent: Dec 20, 2023 10:48 AM
From: DCS Technology
Subject: Aruba upgrade causes Miracast projection failures
It took some time on me comparing old to new controller but I think I have the answer to this issue and explains why 2.4Ghz works and only 5Ghz is the issue. No thanks to Aruba Engineer... I have users testing now to confirm but the more I read and understand, I do believe this is the answer: DFS Channels need to be turned-off/disabled on the 5Ghz radio to play nice with Miracast. So only Channels 36,40,44,48,149,153,157,161 are ON and the rest OFF 52-140 that are considered DFS Channels (144 is default off, if not turn off too). This is controlled in the Radio Profile in Aruba Central. You could have a different Radio profile applied to each group in Aruba Central but I just have it set to my default radio profile (one and only for us).
Caveat; in deployments with a large number of clients, this limits available wireless channels. But as you will see from links below Miracast devices do not understand DFS channels and performance is affected. We do not have enough clients to say so, as even our old system kept up just fine (802.11n) as the DFS channels are off. Pushing 500-600 clients, over 90+ APs, max 30-clients on an AP (depending on where clients were in the building and proximity to an AP) along with Cell phones etc... on Guest network.
I will post to confirm all is well (hopefully) as week goes on but really encouraged by what is being seen.
UPDATE: I can say with confidence, this is the answer. I confirmed and verified a night and day difference for clients.
Scroll down to the section titled: "Troubleshoot connection performance" and read about DFS channels. https://learn.microsoft.com/en-us/surface-hub/miracast-troubleshooting
More info: https://wifinc.net/dfs-channels-and-why-to-avoid-them-even-though-you-say-you-cannot
I understand this better now because of above WIFINC.net article (and we use Actiontec's too):
Original Message:
Sent: Dec 15, 2023 07:33 AM
From: DCS Technology - K-12 Edu
Subject: Aruba upgrade causes Miracast projection failures
No help so far working with Aruba engineer. The connection speed between client device and AP is solid, has been, which is all he was looking at when running commands in terminal against an AP. It's the throughout that tanks after the connection to Miracast display is made that he wasn't even addressing before our meeting was over. I will be reconnecting.
Does the creation of an "AirGroup" come into play here? I am looking at this now just because some things line up, mDNS traffic being the biggie. I do wonder if packets are sent, hit AP and are ignored because it doesn't know what to do with them and there is a bunch of wasted communication which bogs down the radio. https://www.arubanetworks.com/techdocs/central/2.5.7/content/nms/apps/airgroup/airgroup.htm
Original Message:
Sent: Dec 11, 2023 12:04 PM
From: David
Subject: Aruba upgrade causes Miracast projection failures
Awesome, thanks for your info, I'll be waiting for your news :)
Original Message:
Sent: Dec 11, 2023 11:50 AM
From: DCS Technology
Subject: Aruba upgrade causes Miracast projection failures
Right here with you. Upgrade to AP-505's mostly (all we have installed so far, as we have stopped until this is resolved) upon making a Miracast connection, speeds tank. There is no disconnect, just slow and you can see the throughput drop while watching Resource Monitor. You disconnect Miracast (Wi-Fi Direct Connection), never touching wlan connection and things take right off. We are running firmware 10.5.0.1_88128 on all of AP's. You are running 8..., I am convinced this is some setting within Aruba Central or on-premise controller that has to be turned on/off and not related to firmware or even Aruab OS version. I do have a TAC open and have a meeting in about about an hour and will report back if something is found (I am using Aruba Central to manage AP's, no Gateway just Aruba AP's back to older HP Switches).
Original Message:
Sent: Dec 05, 2023 05:08 PM
From: David
Subject: Aruba upgrade causes Miracast projection failures
Hi,
have you found a solution to this problem? We have Aruba 505 APs with 8.11. firmware which are working fine but as soon as someone connects to a screen via miracast the internet becomes unusable.
Original Message:
Sent: Mar 04, 2022 03:12 PM
From: PamMcLeod
Subject: Aruba upgrade causes Miracast projection failures
This problem was resolved today - it was a bug in version 8.7.1.3_79817 . There was a known issue around "latency" - not quite the same description, but apparently it was the issue. We upgraded firmware to 8.7.1.7 and it resolved today.
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Pam McLeod, CAGS/CETL
CTO/CISO
Concord School District
Concord, New Hampshire
pmcleod@sau8.org
Original Message:
Sent: Feb 25, 2022 02:57 PM
From: Pam McLeod
Subject: Aruba upgrade causes Miracast projection failures
We have a TAC open, but it's been 3 weeks and I wanted to put this out here - any direction would be much appreciated!
We are a public school district which has been using Aruba since 2016. We had 200-series APs in a controller environment and upgraded over the holidays this winter to 500-series APs using Aruba Central. In every classroom in the district, we have miracast devices (Microsoft wireless display adapters) which allow our teachers to project wirelessly from their Windows 10 laptops to their projectors. Miracast, as I understand it, using the wireless NIC and both 2.4 & 5GHz, but is a point-to-point connection: https://www.wi-fi.org/discover-wi-fi/miracast .
Symptoms: as soon as we press Windows K to scan for devices to connect to, the laptop's network slows to a crawl (ping -t response times shoot up; speedtests fall to under 1M). Essentially, teachers cannot project.
Laptops: we have multiple models of Dell 5310 & Lenovo windows 10 laptops showing the problem, all using Intel AX201 160Mhz NICs. We've updated drivers and operating systems. Test laptops do work fine in other school buildings.
Location: only occurring in one school building out of 8. Problems are throughout the building, but seem to be concentrated on higher floors (whether that is related to the height, a physical aspect of the floors, the switches, or VC's, I don't know). This is the only building which is tall. It is also close to the hospital and state emergency communications towers (we are in the capitol city); there is a small airport and an Army national guard base about 2 miles away.
Another district in another area of the country is having the same problem, and also has Aruba equipment. I know this because an engineer from Screenbeam responded to a thread I posted on another forum and gathered data for us to help troubleshoot his client's problem; you can see our session in this video .
Theories so far: DRC interference; seen as rogue device; switch configuration in this building.
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Pam McLeod
CTO/CISO
Concord (NH) School District
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