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netispguy
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Re: WAP ac 5GHz issues with iPhone XS

Thu Nov 15, 2018 4:50 pm

We want to understand if this happens with particular iPhone models. Could you please send us the iPhone model and part numbers on which you experience the issue? You can also do it privately by sending it to support@mikrotik.com.

The strings should be something like this:
  • MT9H2ET/A
  • A2097
This particular device performs as expected, no issues seen.
This one is an iPhone XsMax that does not work for sure:

- MT5G2LL/A
- A1921
 
freezer
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Re: WAP ac 5GHz issues with iPhone XS

Thu Nov 15, 2018 6:33 pm

Hi Arturs,

my iPhone XS model is :

A2097
MT9N2PM/A

Greg
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ofer
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Re: WAP ac 5GHz issues with iPhone XS

Thu Nov 15, 2018 6:52 pm

We want to understand if this happens with particular iPhone models. Could you please send us the iPhone model and part numbers on which you experience the issue? You can also do it privately by sending it to support@mikrotik.com.

The strings should be something like this:
  • MT9H2ET/A
  • A2097
This particular device performs as expected, no issues seen.
As I mentioned both iPhones XS were bought in the US and have the following model and part number,
  • MT972LL/A
  • A1920
-Ofer
 
mjAUT
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Re: WAP ac 5GHz issues with iPhone XS

Thu Nov 15, 2018 11:57 pm

I wanted to chime in here since I'm also experiencing the exact same issue.

  • MT9E2ZD/A
  • A2097
 
netispguy
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Re: WAP ac 5GHz issues with iPhone XS

Fri Nov 16, 2018 8:25 pm

It looks like the problem is happening on more than just US phones. At least two on the forum with A2097 are seeing the issue.

The model numbers "Axxx" differ in cellular technologies (e.g. CDMA, GSM, etc), LTE Bands and SIM card architecture. The part numbers (e.g. MTxxxxx/A) specify carrier, color and memory configurations.

iPhone XS:
A1920: US, Canada, Hong Kong and Puerto Rico
A2097: Europe and Asian markets (United Kingdom, Spain, Russia, Italy, France, Singapore, Taiwan, etc.)
A2098: Japan
A2100: China

iPhone XSMAX:
A1921: US, Canada and Puerto Rico
A2101: Europe and Asia
A2102: Japan
A2104: China and Hong Kong
 
aphreet
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Re: WAP ac 5GHz issues with iPhone XS

Fri Nov 16, 2018 9:16 pm

MT9E2RU/A
A2097
 
Veratyr
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Re: WAP ac 5GHz issues with iPhone XS

Fri Nov 16, 2018 9:41 pm

This isn’t limited to iPhone, I’m able to reproduce this with the new iPad Pro 11”, MU1F2TY/A. This is the 4G variant.
 
netispguy
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Re: WAP ac 5GHz issues with iPhone XS

Tue Nov 27, 2018 5:16 pm

MT: ?????
 
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normis
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Re: WAP ac 5GHz issues with iPhone XS

Wed Nov 28, 2018 12:00 pm

Since we are unable to repeat the issue with any new iPhones, I would like to ask everyone to describe the issue (what is happening) in more words, than just "SAME ISSUE", since many of you might have other issues. Please descibe in more detail, especially, how often does it happen and how you observe the problem.
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freezer
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Re: WAP ac 5GHz issues with iPhone XS

Wed Nov 28, 2018 12:14 pm

Mtik guys,

Maybe we can schedule a session where I’ll give your engineer remote access to my cap AC and will reproduce the issue within minutes.

How about that ?

Greg
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normis
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Re: WAP ac 5GHz issues with iPhone XS

Wed Nov 28, 2018 12:44 pm

gladly. please email support and try to arrange time in GMT working hours, if possible.
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freezer
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 3:18 am

Guys,

After some more digging I was finally able to discover how do I get in my LAN those weird IPv6 prefixes from.

It turned out that my Nest Thermostat is rarely sending IPv6 RAs, offering some IPv6 ULA prefixes, causing my devices to use Nest Thermostat’s ipv6 link-local address as their default IPv6 gateway where Nest is definitely not a router. I found that all Nest devices like Smoke detectors etc are doing the same thing.

This combination makes my iPhone XS basically not operational when connected via MikroTik AP set to 802.11ac. It is working fine when MikroTik AP is set to 802.11an. I believe due to some unknown bug in processing 802.11ac packets, MikroTik is preventing the iPhone XS (and most likely the new 2018 iPad Pros as somebody reported) from fallback to IPv4. Maybe it is dropping IPv6 packets, that I don’t have time to check.

All my other devices like iPad Pro 10.5” (2017), iPhone X, MacBook Pro (2017), MacBook 12 (2017), iMac 5K (2015), PC with Windows 10 don’t have problems with connectivity even with those silly IPv6 addresses and gateway assigned. Only the iPhone XS and only on the MikroTik’s AP configured to 802.11ac. I have other Asus 802.11ac AP in the same bridged network and when I’m in its range my iPhone XS works perfectly fine, even tough I still have those IPv6 addresses assigned from Nest Thermostat.

As a temporary workaround I have connected my Nest Thermostat to an isolated Guest SSID on my Asus router, so it is no longer advertising those IPv6 addresses to my home network.
Immediately I got rid of this crazy problem and can enjoy my 866Mbps connection via MikroTik’s AP!!! :)

To MikroTik staff : If you want to reproduce this issue I suggest you connect some Nest device to your network as the only device that advertise IPv6 prefixes and connect your iPhone XS to it using 802.11ac.
You have to wait couple minutes because Nest sends RAs every few minutes or so.
If you have other routers sending IPv6 advertisements you may still not be able to reproduce this issue, so make sure Nest is the only source of IPv6 in your LAN. Your main internet connectivity still has to be over IPv4. Make sure you’re using FQDNs in Safari when testing connection. If you don’t have any Nest equipmnent you might try to connect additional router to your LAN which will only send IPv6 RA’s and ULA prefixes but will have forwarding disabled - sort of dead end IPv6 router.

Flowers and bottles of bourbon are very welcome, if you wanna send one PM me for an address ;)

Best regards,
Greg

Btw. This problem still existed on latest iOS 12.1.1 and on latest RouterOS 6.44beta40
Last edited by freezer on Fri Dec 07, 2018 11:11 am, edited 2 times in total.
-Greg
Skype: freezer_szczecin
 
netispguy
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 3:53 am

Greg,

Good job tracking this down; however, I do have a question. We have nine (9) Nest thermostats. In addition, we have 11 Nest protects. We have a static IPv6 /64 address space that is fully routable. Every device that is configurable has a manually assigned IPv6 address. This includes all MT, Macs, Sony TVs, etc. As you are aware, we cannot configure IPv6 on the IOS devices. Our Core MT is the default route and most every device shows that router as the gateway, and in the case of “self assigned” the address is using the proper prefix. We pass a lot of IPv6 traffic. Since my XS devices are showing a correct public IPv6 address and gateway, it must be the LL address that are messed up. Did i get that right?

I am going to reassign all Nest devices to a new VAP and see if that solves the problem as you suggest.

Comments?

Thanks,

-Scott
 
freezer
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 4:06 am

Scott,

If you have a proper IPv6 default gateway (your edge router) on your iPhone XS then it would mean that the problem is actually forwarding IPv6 packets on MikroTik’s 802.11ac and has nothing to do with Nest in your office. In my case Nest is the only source of IPv6 in my LAN. Once I got rid of the IPv6 my iPhone XS and MikroTik’s 802.11ac works beautifully. Usually when there is a problem with IPv6 the CPE should fallback to IPv4 but somehow it’s not happening and everything is stuck.

Can you text me on Skype - freezer_szczecin
FYI, I’m based in Poland and got +9hrs to pacific time.

Greg
Last edited by freezer on Fri Dec 07, 2018 10:59 am, edited 4 times in total.
-Greg
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netispguy
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 6:41 am

Greg,

I am presently in Whistler Canada on a short holiday. I will
be back next week and will reach out to you.

I am generally located in the San Francisco CA area.

-Scott
 
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Chupaka
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 10:48 am

If you have single AP, can the problem be solved by disabling client-to-client forwarding on wifi?
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freezer
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 10:57 am

Chupaka,

Do you also have Nest in your LAN or any other source of IPv6 ?

Greg
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 11:11 am

Nope, neither Nest nor iPhone :)
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freezer
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 11:15 am

Chupaka,

So what CPE/UE do you have ? This discussion is all about connectivity issues on new Apple CPEs like iPhone XS or 2018 iPad Pro.
-Greg
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 12:40 pm

Hmmm IPV6 package not enabled on our clients router, also no Nest devices. However setting 5Ghz to wireless N does work. Though not ideal.
 
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 2:21 pm

This discussion is all about connectivity issues on new Apple CPEs like iPhone XS or 2018 iPad Pro.
I understand that, I'm just trying to guess whether client isolation on AP can be a workaround for the problem.
Russian-speaking forum: https://forum.mikrotik.by/. Welcome!

For every complex problem, there is a solution that is simple, neat, and wrong.

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ofer
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 2:58 pm

This discussion is all about connectivity issues on new Apple CPEs like iPhone XS or 2018 iPad Pro.
I understand that, I'm just trying to guess whether client isolation on AP can be a workaround for the problem.
I plan to make some changes to the firewall to drop all ipv6 communication from the Nest Thermostat it seems a reasonable workaround for this issue
 
freezer
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 3:27 pm

Ofer,

If you have only one AP and the firewall is processing bridged packets then blocking ICMPv6 should do the job.
-Greg
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freezer
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 3:32 pm

Chupaka,

If client isolation blocks all the multicast traffic between clients then this should also do the job.
-Greg
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ofer
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 3:48 pm

Ofer,

If you have only one AP and the firewall is processing bridged packets then blocking ICMPv6 should do the job.
I thought about dropping all IPv6 packets from the Nest across all my routers, I don't use IPv6 anyway and I removed that package from all the routers.
 
freezer
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 3:54 pm

Ofer,

It doesn’t matter if you have IPv6 package or not because it is pure layer 2 transmission (like broadcast). Actually having IPv6 package might help with setting up some IPv6 firewall rules :)
-Greg
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ofer
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 4:08 pm

Ofer,

It doesn’t matter if you have IPv6 package or not because it is pure layer 2 transmission (like broadcast). Actually having IPv6 package might help with setting up some IPv6 firewall rules :)
Just stating the details but I'll try to configure it to drop IPv6 packets I'm curious to see if it'll resolve it.
 
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normis
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 4:17 pm

Hm interesting. All my IoT devices use another SSID, the main SSID ir only for phones and computers. If you all do the same, do you still see the issue? Do all of you actually have NEST devices?
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ofer
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 4:23 pm

Hm interesting. All my IoT devices use another SSID, the main SSID ir only for phones and computers. If you all do the same, do you still see the issue? Do all of you actually have NEST devices?
I do have the Nest Thermostat so I can check and see if it's actually the cause of the issue.
Seems to be reported long ago - https://forum.archive.openwrt.org/viewt ... p?id=54161
Last edited by ofer on Fri Dec 07, 2018 4:36 pm, edited 1 time in total.
 
freezer
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Re: WAP ac 5GHz issues with iPhone XS

Fri Dec 07, 2018 4:34 pm

Normis,

Bare in mind that Nest in this case is just an external factor which arises some bug in MikroTik software, because same setup with my iPhone XS with same IPv6 ULA prefixes coming from Nest is working fine on ASUS router.
-Greg
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Re: WAP ac 5GHz issues with iPhone XS

Mon Dec 10, 2018 6:45 pm

I do not have any Nest thermostats on my network and I still see this problem.

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