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mDNS, WiFi display sharing device failures on Aruba AP's

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  • 1.  mDNS, WiFi display sharing device failures on Aruba AP's

    Posted May 09, 2022 10:53 PM
    I am looking for guidance on WiFi display sharing devices, such as that of the Screenbeam 1100 here, https://www.screenbeam.com/products/screenbeam-1100-plus.  We purchased one 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, which has the same Cisco LAN, but Aruba AP's, Wi-Fiand 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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  • 2.  RE: mDNS, WiFi display sharing device failures on Aruba AP's

    EMPLOYEE
    Posted May 11, 2022 12:51 PM
    If you just have an "allow all" firewall policy for your roles, all your clients (and the screenbeam devices) are in the same VLAN and broadcast filtering is disabled, your clients should be able to see your screenbeam devices without enabling Airgroup.

    You would need Airgroup if:
    - Your clients and screenbeams are not in the same VLAN, and you need them to see each other
    or 
    - You want to improve performance by enabling broadcast filtering and you still want your clients to see your screenbeam devices.

    Try to put everything in the same VLAN and disable broadcast filtering first to ensure that you don't have a separate issue.

    ------------------------------
    Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.

    HPE Design and Deploy Guides: https://community.arubanetworks.com/support/migrated-knowledge-base?attachments=&communitykey=dcc83c62-1a3a-4dd8-94dc-92968ea6fff1&pageindex=0&pagesize=12&search=&sort=most_recent&viewtype=card
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  • 3.  RE: mDNS, WiFi display sharing device failures on Aruba AP's

    Posted May 11, 2022 06:53 PM
    Thanks @cjoseph @cjoseph

    The settings before I changed anything is​​​ Broadcast Filtering - ARP. 

    The clients and the mDNS sharing device are in the same VLAN.  The devices supports two networks, one wired, and the other wireless.  We want wired for the Private network and wireless for Guest. 

    The wireless clients on the Private network can see the sharing device, but cannot consistently connect.  Sometimes they connect, sometimes they do not.  Sometimes after connecting, they disconnect. 

    The wireless clients on the Guest network cannot see the sharing device, unless I disable Broadcast Filter.  The experience then, is the same as the users above on the Private network, inconsistent. 

    From what you stated, it sounds like AirGroup is not needed.  However, I do want the best performance, so if AirGroup would help, please advise.

    ------------------------------
    Christopher
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  • 4.  RE: mDNS, WiFi display sharing device failures on Aruba AP's

    EMPLOYEE
    Posted May 11, 2022 09:42 PM
    Are you using Aruba Instant, or are these controller-based access points?

    ------------------------------
    Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.

    HPE Design and Deploy Guides: https://community.arubanetworks.com/support/migrated-knowledge-base?attachments=&communitykey=dcc83c62-1a3a-4dd8-94dc-92968ea6fff1&pageindex=0&pagesize=12&search=&sort=most_recent&viewtype=card
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  • 5.  RE: mDNS, WiFi display sharing device failures on Aruba AP's

    Posted May 12, 2022 12:12 AM
    These are Instant/Virtual controller.

    ------------------------------
    Christopher
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  • 6.  RE: mDNS, WiFi display sharing device failures on Aruba AP's

    Posted May 19, 2022 08:09 PM

    @cjoseph,
    Any other ideas?  ​

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



  • 7.  RE: mDNS, WiFi display sharing device failures on Aruba AP's

    EMPLOYEE
    Posted May 19, 2022 10:07 PM
    You should disable broadcast filtering.

    ------------------------------
    Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.

    HPE Design and Deploy Guides: https://community.arubanetworks.com/support/migrated-knowledge-base?attachments=&communitykey=dcc83c62-1a3a-4dd8-94dc-92968ea6fff1&pageindex=0&pagesize=12&search=&sort=most_recent&viewtype=card
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  • 8.  RE: mDNS, WiFi display sharing device failures on Aruba AP's

    EMPLOYEE
    Posted 26 days ago
    Just quickly, did you get this resolved by removing the broadcast filtering? Or did you narrow this down at all?

    I have plenty of customers using screen beam, great product, but i dont recall any issues, until yesterday, where it seems intermittent even on the same vlan.... so just curious :)


  • 9.  RE: mDNS, WiFi display sharing device failures on Aruba AP's

    Posted 26 days ago
    No, this didn't work.  I already had Broadcast filtering off in the initial troubleshooting.  I will restart the network, and see if that allows it take effect, in the next available window that I can. 

    Let me know what you find in your environment to resolve.

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



  • 10.  RE: mDNS, WiFi display sharing device failures on Aruba AP's

    EMPLOYEE
    Posted 26 days ago
    If you you have airgroup off, and broadcast filtering is disabled, and your clients are in the same VLAN, there should be nothing in the way of your WLAN blocking those advertisements.

    ------------------------------
    Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.

    HPE Design and Deploy Guides: https://community.arubanetworks.com/support/migrated-knowledge-base?attachments=&communitykey=dcc83c62-1a3a-4dd8-94dc-92968ea6fff1&pageindex=0&pagesize=12&search=&sort=most_recent&viewtype=card
    ------------------------------