I have a RB751 at home. My Moto X's wireless likes to just stop passing traffic. I log in and see a bunch of deauths and key timeouts in the log. I had the preamble set to both and changed it to long the other day. I also updated it to 6.30 last night before I went to bed. So I'm hoping one of those fixes it. This also happens with my phone and others in the office on the Unifi though, but a lot less frequent. MT wireless is just.. different.

On 7/14/2015 5:14 AM, Ken Hohhof wrote:
I assume you had it on both (the default), not short, before the switch?
I will give that a try, shouldn’t be any downside I don’t think. I’m wanting to try stuff that has worked for other people, not random stuff.
*From:* Mike Hammett <mailto:af...@ics-il.net>
*Sent:* Monday, July 13, 2015 9:52 PM
*To:* af@afmug.com <mailto:af@afmug.com>
*Subject:* Re: [AFMUG] Netflix app on iPad keeps asking to reconnect
I changed one to long and the key exchange drops seem to have vanished.



-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com

------------------------------------------------------------------------
*From: *"Ken Hohhof" <af...@kwisp.com>
*To: *af@afmug.com
*Sent: *Monday, July 13, 2015 9:50:03 PM
*Subject: *Re: [AFMUG] Netflix app on iPad keeps asking to reconnect

I have it set to both. I thought the issue was if you set it to short only.
*From:* David Milholen <mailto:dmilho...@wletc.com>
*Sent:* Monday, July 13, 2015 9:45 PM
*To:* af@afmug.com <mailto:af@afmug.com>
*Subject:* Re: [AFMUG] Netflix app on iPad keeps asking to reconnect
Been seeing alot of this with apple devices that have issues staying connected or connecting in general and changing the preamble setting to long seems to fix
most issues


On 7/13/2015 9:38 PM, Ken Hohhof wrote:

    This is set to 2437, not auto.
    The complaining customer called today and said the issue is 99%
    fixed after I changed the group key exchange from 5m to 60m, which
    unfortunately is as long as RouterOS lets you set it.  I believe
    this is the interval for rotating the group ciphers, not the
    timeout for the exchange.  Not sure why the Apple devices seem to
    be not doing the handshake for the new keys, resulting in them
    getting deauthed and disconnected.
    The only other thing I am considering is changing channel width
    from 20/40 to 20 MHz.  There’s a list of tips from Apple that says
    to do that in 2.4 GHz, but they seem to imply it’s for
    compatibility with other devices, not specifically iOS devices.
    The other thing Apple recommends is enabling WMM, I’m not sure if
    that’s a good idea, especially since Mikrotik doesn’t support WMM
    sleep mode, AFAIK. I’m not sure why just the QoS part of WMM would
    prevent a client from getting disconnected.
    *From:* Chris Wright <mailto:ch...@velociter.net>
    *Sent:* Monday, July 13, 2015 10:36 AM
    *To:* af@afmug.com <mailto:af@afmug.com>
    *Subject:* Re: [AFMUG] Netflix app on iPad keeps asking to reconnect

    I’ve seen plenty of iOS devices throw fits whenever the wireless
    access point is set to auto frequency selection. Some
    iPads/iPhones/etc. get left behind when the channel switches.

    Chris Wright

    Network Administrator

    Velociter Wireless

    209-838-1221 x115

    *From:*Af [mailto:af-boun...@afmug.com] *On Behalf Of *Ken Hohhof
    *Sent:* Friday, July 10, 2015 6:44 AM
    *To:* af@afmug.com
    *Subject:* Re: [AFMUG] Netflix app on iPad keeps asking to reconnect

    Let’s not get sidetracked with a discussion of downgrading, I
    don’t think that’s relevant here.  I do understand what you’re
    saying about the changelog – Mikrotik may have changed/fixed
    something from 6.19 to 6.29 silently without noting it in the
    changelog.

    I was kind of hoping someone knew a trick to get the Netflix app
    to just keep playing rather than popping up an error message. Or
    had seen this problem before and knew how to fix it.

    The group key exchange timeout may be a red herring.  I’m not sure
    if Mikrotik is doing a good thing by kicking the client off when
    the group key exchange fails after a key rotation.  I guess it
    prevents a situation where the client can’t talk to other clients
    on the same LAN because multicast/broadcast traffic isn’t getting
    through.  But maybe it would be less intrusive to just wait for
    the next key rotation to restore that functionality rather than
    forcing a disconnect.  Also I’m not sure why they won’t let you
    set the key rotation interval longer than 1 hour or turn off
    rotation entirely, probably for security reasons.

    *From:*Mike Hammett <mailto:af...@ics-il.net>

    *Sent:*Friday, July 10, 2015 8:12 AM

    *To:*af@afmug.com <mailto:af@afmug.com>

    *Subject:*Re: [AFMUG] Netflix app on iPad keeps asking to reconnect

    The don't downgrade applies to ROS version and firmware. There may
    not be an issue with a given product and two versions, but it's a
    good habit to get into.

    Mikrotik's changelog is like cheating on your spouse. Everyone
    sees you behaving differently now, but there's no official
    paperwork showing it.



    -----
    Mike Hammett
    Intelligent Computing Solutions
    http://www.ics-il.com

    ------------------------------------------------------------------------

    *From: *"Ken Hohhof" <af...@kwisp.com <mailto:af...@kwisp.com>>
    *To: *af@afmug.com <mailto:af@afmug.com>
    *Sent: *Friday, July 10, 2015 8:06:13 AM
    *Subject: *Re: [AFMUG] Netflix app on iPad keeps asking to reconnect

    This particular router has Routerboard FW 3.18 so I think it was
    upgraded to 6.19 not downgraded. Also, I don’t see any wireless
    related changes in the changelog from 6.19 to 6.29.

    I’m thinking of changing the group key update interval from 5m to
    1h which I think is the max.  I’m not sure if the group key
    exchange timeouts are due to the client being in sleep mode, or a
    problem I should be worrying about.  The fact that the Mikrotik
    sends deauth to disconnect the client which then immediately
    connects doesn’t seem like a good think.  Without the deauth and
disconnect, I would not expect unicast traffic to be affected. I’m thinking the iPad knows the WiFi disconnected and tells the
    app which then pops up the annoying error which requires the user
    to tap OK and then Play.

    If I change the timeout to 1h and the frequency of the problem
    stays the same, I think that will eliminate this as the possible
    cause.

    Reading the logs can be confusing, it’s amazing how many iPhones
    and iPads one family can have.  Hard to sort out the problems from
    normal events.

    *From:*Mike Hammett <mailto:af...@ics-il.net>

    *Sent:*Friday, July 10, 2015 7:20 AM

    *To:*af@afmug.com <mailto:af@afmug.com>

    *Subject:*Re: [AFMUG] Netflix app on iPad keeps asking to reconnect

    I don't believe you're ever supposed to downgrade a device's
    shipped software, due to unknown chipset\driver changes.



    -----
    Mike Hammett
    Intelligent Computing Solutions
    http://www.ics-il.com

    ------------------------------------------------------------------------

    *From: *"Ken Hohhof" <af...@kwisp.com <mailto:af...@kwisp.com>>
    *To: *af@afmug.com <mailto:af@afmug.com>
    *Sent: *Thursday, July 9, 2015 9:42:19 PM
    *Subject: *Re: [AFMUG] Netflix app on iPad keeps asking to reconnect

    Actually no, I have everything on 6.19 because it was stable for
    me and I
    don't like facing the choice of either upgrading everything in the
    field
    every month or having every router on a different version.  I've
    even been
    downgrading the latest shipment of 951G's that came in with 6.23.

    Usually switching to Mikrotik from store bought routers solves a
    lot of
    iPad/iPhone problems for us.

    He said this is the latest iPad, would that be the iPad Air 2? I
    remember
    the iPad Air being new 2 Christmases ago.


    -----Original Message-----
    From: Justin Wilson - MTIN
    Sent: Thursday, July 09, 2015 9:20 PM
    To: af@afmug.com <mailto:af@afmug.com>
    Subject: Re: [AFMUG] Netflix app on iPad keeps asking to reconnect

    Apple devices are picky on their wifi stuff when it comes to
    mikrotik.  I
    assume you have upgraded to the latest version of RouterOS. This
    is one of
    the few times running the latest helps.  I was running 6.21 on one
    of my APs
in the house and anytime I roamed to it things became very slow. OS upgrade
    helped.

    Is this an iPad, Ipad2, iPad Air?

    Justin

    ---
    Justin Wilson <j...@mtin.net <mailto:j...@mtin.net>>
    http://www.mtin.net Managed Services � xISP Solutions � Data
    Centers
    http://www.thebrotherswisp.com Podcast about xISP topics
    http://www.midwest-ix.com Peering � Transit � Internet Exchange

    > On Jul 9, 2015, at 6:17 PM, Ken Hohhof <af...@kwisp.com
    <mailto:af...@kwisp.com>> wrote:
    >
    > I just talked to the customer again and the Netflix error he is
    getting is
    > 1016.
    >
    > If he clicks OK and Play, it starts playing again. Of course the
    Netflix
    > troubleshooting tips say things like power cycle your router and
    modem.
    >
    > The only thing that occurs to me is we put in a Mikrotik router
    with 2.4
    > GHz WiFi, previously he was using a Frontier DSL modem, not sure
    if that
    > was dual band WiFi or not.  But if I Google Netflix error 1016,
    some of
    > the suggestions involve turning off Bluetooth on the iPad.  Other
    > suggestions have to do with location services.  None of those sound
    > logical to me, but who knows with iDevices and Netflix apps.
    >
    >
    > -----Original Message----- From: Ken Hohhof
    > Sent: Thursday, July 09, 2015 4:08 PM
    > To: af@afmug.com <mailto:af@afmug.com>
    > Subject: [AFMUG] Netflix app on iPad keeps asking to reconnect
    >
    > I have a new customer who says our Internet is faster than the
    DSL they
    > had
    > before, but he is having a problem with Netflix on his (WiFi
    only) iPad
    > that
    > didn't occur on the DSL.
    >
    > He says it will stop and say it is no longer connected, does he
    want to
    > reconnect? He clicks yes, and it works again for awhile.
    >
    > I cannot find anything regarding this with Google. Can anyone
    enlighten
    > me?
    >
    >
    >


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