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effndc
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WAP ac 5GHz issues with iPhone XS

Tue Sep 25, 2018 2:07 am

I am seeing a really odd issue/conflict between the new iPhone XS and the Mikrotik WAP ac (RouterBOARD wAP G-5HacT2HnD) currently running 6.43.2.

The iPhone XS does not work well with the Mikrotik on 5GHz, the problem seems worst on 80MHz channels (Ceee) and the absolute worst is in the higher frequency channels. In general the iPhone XS does not work reliably with the Miktorik in the 5GHz, the only other access point I have to test with is an Asus RT-N56U that only supports 40MHz channels. The phone works "fine" on the Asus, but most of the time on the Mikrotik it fails to communicate.

It is odd that none of my other devices have this issue, including iPad Air, iPhone SE, iPhone 8, iPhone X....those all work fine. So it is either something about the Mikrotik is out of expectation or the iPhone XS is, but it is odd that the iPhone XS works fine on the ASUS as well.
/interface wireless 
set [ find default-name=wlan2 ] band=5ghz-onlyac disabled=no frequency=5765 mode=ap-bridge multicast-helper=full name="SSID 5GHz" security-profile="security-profile" ssid="SSID 5GHz" wireless-protocol=802.11 wmm-support=enabled wps-mode=disabled
(I just switched it to the 5ghz-onlyac as a troubleshooting step, it was on default to allow A/N/AC during most testing)

Any pointers appreciated, I am hoping it is something stupid simple at this point.
 
mducharme
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Re: WAP ac 5GHz issues with iPhone XS

Tue Sep 25, 2018 2:20 am

I notice you don't have a country set for your wireless interface. You should set that, otherwise the interface may be able to select a frequency that is not allowed in your country and the phone may then refuse to connect. There are other potential issues, but that jumps out as a possibility.
 
effndc
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Re: WAP ac 5GHz issues with iPhone XS

Tue Sep 25, 2018 2:36 am

I notice you don't have a country set for your wireless interface. You should set that, otherwise the interface may be able to select a frequency that is not allowed in your country and the phone may then refuse to connect. There are other potential issues, but that jumps out as a possibility.
This model is hard coded to "united states3". I have 3 of these, but oddly one does allow country selection (even though it is supposed to be hard coded).

It is really odd that if I use 2.4GHz with all settings "similar" between the two networks, the 2.4GHz works every time (within the bandwidth constraints of 2.4GHz). I prefer to not use 2.4GHz due to performance and interference in the urban environment.

To make this even more unusual, it works for "local" network traffic (e.g. the phone can open up the Webfig of my router) but fails for anything over the Internet...even though all other devices work fine. To test locally I open the Webfig splash page for my router (RouterBOARD 750G r3) and for the Internet test it is as simple as using the whatip.me site.

Noise floor using the "Frequency Usage" report on the AP I am actively connecting to shows -104 to -100, with the highest frequencies (that I am attempting to use in this AP location) having the lowest usage.
 
effndc
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Re: WAP ac 5GHz issues with iPhone XS

Tue Sep 25, 2018 3:17 am

This problem gets even more unusual, as it really seems to be something about the IPv6 tunnel I have from Hurricane Electric. Which even makes less sense when it works over 2.4GHz.
 
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normis
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Re: WAP ac 5GHz issues with iPhone XS

Tue Sep 25, 2018 8:38 am

No answer to your question? How to write posts
 
RoutoRooter
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Re: WAP ac 5GHz issues with iPhone XS

Tue Sep 25, 2018 5:56 pm

Whatever the problem is, it only affects 802.11AC connections. "N" works perfectly. Really odd. Experiencing these exact symptoms when connected via "AC".
 
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pukkita
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Re: WAP ac 5GHz issues with iPhone XS

Tue Sep 25, 2018 6:23 pm

Just tested an EU XS with a hAP AC 6.40.9, works flawlessly, 100/115 MBps using 5GHz AC 40MHz.

Looks like device specific, definitely pointing to the iphone.

To rule everything out, Is System > Routerboard Current Firmware same version as Upgrade one?
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RoutoRooter
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Re: WAP ac 5GHz issues with iPhone XS

Wed Sep 26, 2018 3:16 am

I’ve tried it with both current and bug fix packages and router board firmware. Have you tested with 80mhz channels?
 
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harvey
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Re: WAP ac 5GHz issues with iPhone XS

Sun Oct 07, 2018 1:56 am

Hi,

I just wanted to cross post a similar thread where others have reported the same issues with HAP AC's.

I too use 80MHz Channels and HE IPv6 tunnels. I haven't tried changing these.

The thread is here viewtopic.php?f=2&t=139524

I don't believe the phone is at fault as I use Unifi AC Pros on 80MHz channels at work and a test one at home and the phone works fine when connected to them.
 
netispguy
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Re: WAP ac 5GHz issues with iPhone XS

Thu Oct 11, 2018 4:02 am

OMG... I cannot believe I just stumbled actress this link.

We are having the exact same problems as mentioned by @effndc.

We have 9 MK APs of various types. All running 6.43, with matching 6.43 firmware. All running multiple SSID 5Ghz/80MHz channels (along with 2.4GHz service) with the same SSID name (plus a bunch of virtual channels of various SSID names). Been stable for a very long time. We have a number of iPhoneX, iPads, MacBook Pros, etc and for the past month, some iPhone Xs and iPhone XsMax. Everything works perfectly EXCEPT the "s" models. These units are barely usable on the MK framework. As mentioned, the "s" models work good on the local LANs, but Internet usage is a constant nightmare. Browsers don't connect, iCloud and other services report "unable to connect," email reports unable to reach servers, etc, etc, etc.

We have been working with Apple tier II and III to solve this problem, supplying them with logs and such. We have exchanged one Xs and one XsMax to make sure we are not dealing with defective hardware. We have groomed apps in the event one or more was causing a problem. We have done "restore to new iPhone" more times than I can remember. I have checked every MK config, including the "wireless", "bridges" all firewalls (IPv4 and IPv6) to the point that I am have bad dreams about them. The iPhoneXs and iPhoneXsMax are unusable on the MK framework at this time...

However, I did find a totally unacceptable workaround. As I was going through the settings of an iPhoneXsMax and wanted to see if I could get to our remote network on the East Coast (I am out West). I established a L2TP VPN connection to our Boston location (which also has MK) and it connected just fine. The interface is configured to send all traffic via the tunnel. I noticed after a few mins that I no longer had issues... it was totally working for everything. So, I dropped the VPN and established a new VPN to my local router (which is generally only used for inbound connections.) Again, working 100%...yup 100%... when I dropped the connection, back to not working again.

This is an urgent problem that need to be addressed asap. The new iPhones are not viable on the MK framework at this time. If MK believes this is an Apple issue, I have a way to get it to the appropriate people, but I must have details of what needs addressing... but given these new Apple devices seem to have no issue on other frameworks, I think this is a MK issue.
 
philamonster
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Re: WAP ac 5GHz issues with iPhone XS

Fri Oct 12, 2018 1:33 pm

Maybe this is of interest to XS users:

https://support.apple.com/en-us/HT209084
Resolves an issue that could cause iPhone XS devices to rejoin a Wi-Fi network at 2.4GHz instead of 5GHz
 
netispguy
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Re: WAP ac 5GHz issues with iPhone XS

Fri Oct 12, 2018 4:36 pm

@philamonster I can confirm that IOS 12.0.1 does fix the disconnct problem contained in the release notes link you suggested. However, it does not fix the issue being discussed in this topic.

Xs models are still seeing issues using when attached to Mikrotik 5GHz 80MHz AC configurations.
 
anuser
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Re: WAP ac 5GHz issues with iPhone XS

Sat Oct 13, 2018 9:46 am

Version 6.44beta14 has been released.
*) wireless - improved stability for 802.11ac;
Have you tried latest 6.44beta release, too?
 
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harvey
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Re: WAP ac 5GHz issues with iPhone XS

Sat Oct 13, 2018 12:55 pm

Version 6.44beta14 has been released.
*) wireless - improved stability for 802.11ac;
Have you tried latest 6.44beta release, too?
Already seen and tried without luck
 
netispguy
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Re: WAP ac 5GHz issues with iPhone XS

Sat Oct 13, 2018 5:17 pm

I agree with @harvey: 6.44beta does not fix this problem.

Only workaround right now is to configure your radios to any of the 5GHz-A/N settings. No "AC". This impacts all 5GHz users, but lets the new Xs models at least function.
 
tapir
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Re: WAP ac 5GHz issues with iPhone XS

Sat Oct 13, 2018 8:31 pm

I don't have an iPhone Xs to test with but does knocking the 5Ghz down to a 40Mhz channel width make any difference? I could see this potentially being an issue for some of our customers. I do run the 2.4 and 5Ghz on separate SSIDs so can just tell them use the 2.4Ghz radio for now.
 
netispguy
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Re: WAP ac 5GHz issues with iPhone XS

Sat Oct 13, 2018 11:38 pm

Any of the "AC" bands are a problem at all channel widths. We see it on both 20/40/80MHz and 20/40MHz channel widths (regardless of center channel config). The Xs models will work if you use any of A/N bands and any channel width. AC is the problem.

Our config uses the same SSID for both 2.4GHz and 5GHz, so our users do not have a choice of radios.
 
freezer
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Re: WAP ac 5GHz issues with iPhone XS

Mon Oct 15, 2018 11:47 pm

I have exactly same problem with my iPhone XS (bought from official european distributor). Problem exists on iOS 12.0 and 12.0.1.

My Mikrotik cAP AC is running 6.43.2 - software and firmware, and previously was running one of the recent 6.43 release candidates.
This is specific problem of Mikrotik and iPhone XS, as my other phones (iPhone X, iPad Pro) running same iOS version (12.0.1) are working fine with this Mikrotik AP, also my ASUS RT-AC86U is working properly with iPhone XS.

This setup (cAP AC) was stable for months and only iPhone XS is having problems here.

I'm using:

5GHz-A/N/AC
20/40/80MHz XXXX
5180
L2MTU 1600
MTU 1500
 
netispguy
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Re: WAP ac 5GHz issues with iPhone XS

Tue Oct 16, 2018 12:06 am

I have exactly same problem with my iPhone XS (bought from official european distributor). Problem exists on iOS 12.0 and 12.0.1.

My Mikrotik cAP AC is running 6.43.2 - software and firmware, and previously was running one of the recent 6.43 release candidates.
This is specific problem of Mikrotik and iPhone XS, as my other phones (iPhone X, iPad Pro) running same iOS version (12.0.1) are working fine with this Mikrotik AP, also my ASUS RT-AC86U is working properly with iPhone XS.

This setup (cAP AC) was stable for months and only iPhone XS is having problems here.

I'm using:

5GHz-A/N/AC
20/40/80MHz XXXX


5180
L2MTU 1600
MTU 1500
Yup... You are seeing exactly what we have been discussing... only the Xs and XsMax impacted. And the problem seems to exist across all of the Mikrotik platforms. Although it seems to strongly suggest this is a MIkrotik problem, I am not 100% certain that Apple may also be doing something that is out of spec. My other office is 100% Cisco, and the Xs and XsMax works fine.

Until they fix it, trying setting your radio to:

5GHZ-A/N
20/40MHZ XX
<any frequency, etc will work>

-or-

I have found that if you create an L2TP VPN service on your router, and connect the "Xs" to it, that seems to work even on AC setups... but that is totally unacceptable to me.

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