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  • [Wolvineers] Sparklester
    started a topic No direct network

    No direct network

    We acquired two new phones yesterday which we can't connect over with WiFi Direct. It would just connect for a few seconds before disconnecting, and the same can happen over and over again for five minutes before not being able to connect anymore for a good while. On WiFi direct settings page there's always one of the phones, either the RC or the DS that shows the other having been invited, yet there's no invitation. The same can happen them inviting each other without use of it.

    Accepting the invitation if it does arrive, won't do anything and will leave the other phone awaiting for invite approval.

    Our phones are two Motorola Moto G4 Play. Updated to latest version of Android avaliable.
    An hour ago the same happened with two other phones we just used to troubleshoot the error, and it still persists.

    Do you know of any workaround? It doesn't seem to be so much of a specific issue, for it happened on other phones as well.

  • DanOelkeFTA
    replied
    I am glad you were able to track down the source of the problem. Good job!

    Leave a comment:


  • [Wolvineers] Sparklester
    replied
    Originally posted by 3805Mentor View Post
    So if I understand correctly the phones connect and work fine everywhere except when in range of the school's network. I'd explain this carefully and fully to the IT guys and have them double check.
    Originally posted by DanOelkeFTA View Post
    It does sound like the school has a "wireless intrusion prevention system" - you can try asking the IT guys using that phrase.

    In a school district it isn't uncommon for the technical people to not know all the details of every technology being used. And network router setup is something of a speciality. It might even be outsourced with the local staff not knowing the details. Try to be understanding with them because they are just trying to do their job too.

    The other possibility I can think of is that the phone is dropping the Wifi direct to favor the schools WiFi connection. Have the phone forget all of the school's Wifi SIDs. That way it shouldn't try to connect to them automatically.
    Originally posted by 11343_Mentor View Post
    Our school has several layers of wifi protections, the chief one that killed our phones is a technology to disable unknown wireless hotspots, which of course kills any peer to peer devices like our phones. They had to put us on a whitelist of known SSID's. The only problems we had after that was when we hosted a competition at our school. They disabled that particular system , which then our phones (and only our phones ) wouldn't work as there were issues with any of the whitelisted hotspots!
    We shut down the main server for 15 minutes and it the connections began to work. As soon as we turned it back on, out direct network went down.

    After discussing it for a while with our IT and networks manager, found out Cisco Meraki routers, used in our school, have a rogue network detector, and if its bandwith is ever saturated, the Air Marshal kills that network and blocks the SSIDs.

    It is the case because a few days before we encountered this problem he did some bandwith enlargement switches without a full restart, and the net ended up lagging. We could succesfully whitelist our device's SSID and now it works just perfectly.

    Thank you all, woulnd't have spotted its a WiFi blocker without your help.

    Leave a comment:


  • 11343_Mentor
    replied
    Our school has several layers of wifi protections, the chief one that killed our phones is a technology to disable unknown wireless hotspots, which of course kills any peer to peer devices like our phones. They had to put us on a whitelist of known SSID's. The only problems we had after that was when we hosted a competition at our school. They disabled that particular system , which then our phones (and only our phones ) wouldn't work as there were issues with any of the whitelisted hotspots!

    Leave a comment:


  • DanOelkeFTA
    replied
    It does sound like the school has a "wireless intrusion prevention system" - you can try asking the IT guys using that phrase.

    In a school district it isn't uncommon for the technical people to not know all the details of every technology being used. And network router setup is something of a speciality. It might even be outsourced with the local staff not knowing the details. Try to be understanding with them because they are just trying to do their job too.

    The other possibility I can think of is that the phone is dropping the Wifi direct to favor the schools WiFi connection. Have the phone forget all of the school's Wifi SIDs. That way it shouldn't try to connect to them automatically.

    Leave a comment:


  • 3805Mentor
    replied
    So if I understand correctly the phones connect and work fine everywhere except when in range of the school's network. I'd explain this carefully and fully to the IT guys and have them double check.

    Leave a comment:


  • [Wolvineers] Sparklester
    replied
    Originally posted by 3805Mentor View Post
    Are you at a school? This sounds a lot like other reports of wifi blocking being turned on by IT. Try connecting out of range of the school's wifi. See
    https://github.com/ftctechnh/ftc_app...roubleshooting
    A coach took the phones home at our orders and checked that the connection didn't fall a single time. Today, still with the problem, we tried again just going to the street, where it worked perfectly.
    We spoke to our school director and our IT and network manager and none seems to have notice of any active WiFi blockers or network config changes over the last two weeks that could affect other WiFi networks, just a bandwith enlargement just for the school's WiFi network.

    Lenovo support told us to try safe booting for plain WiFi direct connection (same problem: connected - group owner avaliable - Invited[on DS] and Avaliable[on RC]). They also requested us to factory reset both phones, but that's something we did multiple times before.

    Leave a comment:


  • 3805Mentor
    replied
    Are you at a school? This sounds a lot like other reports of wifi blocking being turned on by IT. Try connecting out of range of the school's wifi. See
    https://github.com/ftctechnh/ftc_app...roubleshooting

    Leave a comment:

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