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Aruba upgrade causes Miracast projection failures

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  • 1.  Aruba upgrade causes Miracast projection failures

    Posted Feb 28, 2022 12:56 AM
    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.





    ------------------------------
    Pam McLeod
    CTO/CISO
    Concord (NH) School District
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  • 2.  RE: Aruba upgrade causes Miracast projection failures

    MVP GURU
    Posted Feb 28, 2022 07:32 AM
    Can you share the output for your configured radio/wlan settings? Virtual AP profile, SSID profile, radio-profile, and ap-group setting?

    ------------------------------
    Dustin Burns

    Lead Mobility Engineer @Worldcom Exchange, Inc.

    ACCX 1271| ACMX 509| ACSP | ACDA | MVP Guru 2022
    If my post was useful accept solution and/or give kudos
    ------------------------------



  • 3.  RE: Aruba upgrade causes Miracast projection failures

    MVP GURU
    Posted Feb 28, 2022 07:36 AM
    Also, as another check, have you tested with High Efficiency (802.11ax) turned off? Some clients have issues on 802.11ax WLANs.



    ------------------------------
    Dustin Burns

    Lead Mobility Engineer @Worldcom Exchange, Inc.

    ACCX 1271| ACMX 509| ACSP | ACDA | MVP Guru 2022
    If my post was useful accept solution and/or give kudos
    ------------------------------



  • 4.  RE: Aruba upgrade causes Miracast projection failures
    Best Answer

    Posted Mar 04, 2022 03:12 PM
    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.

    ------------------------------
    Pam McLeod, CAGS/CETL
    CTO/CISO
    Concord School District
    Concord, New Hampshire
    pmcleod@sau8.org
    ------------------------------



  • 5.  RE: Aruba upgrade causes Miracast projection failures

    Posted May 09, 2022 10:49 PM
    Is Screenbeam still working ok for you?  We purchased a Screenbeam 1100 for our organization.  I configured and tested it at home in a Cisco LAN environment with Meraki AP's, and it worked flawlessly.  I took it into the building expecting the same, as the Cisco LAN is the same, but with Aruba AP's, and it worked one time on the Internal network, and never on the guest network.  It then stopped worked completely.  I took it back home, and again it works great. 

    On the Aruba Instant AP network, I tried the following: 
    • Turned on AirGroup with Enable Bonjour, Guest Bonjour multicast, allowall, but it still didn't work
    • On the guest network, I set Broadcast filtering to Disabled, and Deny inter user bridging to off, but it still didn't work

    We are using Aruba AP 535's on 8.8.0.2.  The user clients and Screenbeam devices are in the same vlan. 
    Any ideas? 

    The network requirements from the manufacturer are: 
    Multicast DNS (mDNS) support is required for iOS and macOS native screen mirroring
    to auto-discover ScreenBeam
    Required ports
    5353 (UDP) for Multicast DNS (mDNS) discovery
    7100 (TCP and UDP) for macOS, iOS and Windows 10 mirroring
    7250 (TCP) for Miracast over LAN data stream
    47000 (TCP) for Airtunes in AirPlay
    18000-18009 (TCP) for macOS and iOS AV data

    ------------------------------
    Christopher
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