MikroTik

netispguy

So, problem now solved. I took your advice and shut things down for a while (about 1 hour +-), When I brought things back up, a new dynamic IP was assigned. This is not always the case, but okay. After making a few adjustments on the client side's firewall for the new IP, the PPP interface came righ...

netispguy

I shut the connection for almost an hour with no improvement. Maybe I need to totally drop the entire router connection for a while???

Comcast (Xfinity) is serving me a dynamic public IP. Is NAT still being used on their end even-though it looks like I have public IP.

-Scott

netispguy

The problems started in the middle of the night when no other users (except for the persistent connection between MT router) was/were active. We did have an issue a long time ago when version 7 first came out that prevented multiple users behind the same router from connecting; however, that was res...

netispguy

Thanks for your fast response. This remote router is on a Comcast internet connection. I do not have access to that router. Any additional suggestions? By the way, other L2TP connections from individual users (like from iPhone) is still working... only the Mikrotik-Mikrotik connection is broken. -Sc...

netispguy

We have had a tunnel up for over 5 years using L2TP and IPsec between two RB4011iGS+ with no issues. This morning, without any reason, my log was filled with: "phase1 negotiation failed due to time up ....." and the connection will not establish. The calling side is just sitting there with...

netispguy

I'd like to know also! I have a legacy network with 9 ap's controlled by wireless>CAPsMAN on an RB4011 with no network interfaces, and about 68 active devices. I just received some hAp-ax^2 and they are not compatible with the current CAPsMAN. I tried to setup the wave2 CAPsMan via wifi>Remote CAp> ...

netispguy

You cannot fix this, the error is on their side and they refuse to fix it. Best you can do is to configure logging to suppress this warning.

Thanks!

I guess it's "warning, !radvd" time for me

-S

netispguy

By the way, I do not get this error on my Comcast Business accounts w/static IPs... Just on the Xfinity frameworks.

-S

netispguy

I appreciate your response.

I have looked over the links and I am not sure I see anything that resolves that issue.

Is there no simple solution to stop this mtu warning message?

-S

netispguy

@kentzo, setting the ND parameters as you indicated has fixed my IPv6 Xfinity routing problems; however, now I am being flooded with the following warnings in my log:

invalid mtu 9192 on Comcast-gateway from fe80::21c:73ff:fe00:99

Any suggestions?

-S

netispguy

Just to be sure...can you share your config? And have you tried replacing the power supply (though I doubt it is related)? What version RouterOS are you running? Have you already tried a Netinstall? Running RouterOS 7.10.1. Have been seeing this since about 7.8. I am not all that comfortable about ...

netispguy

I have a RB4011iGS+ that has been running and stable for a few years. The unit has gone many months without a reboot in the past. Recently (I think it started at RouterOS 7.8) it randomly is loosing all of the ports on the switch1 group (i.e. ether1-5). When I check switches in winbox it shows all p...

netispguy

This has been a particularly difficult upgrade. I was having problems with a number of things including, but not limited to L2TP issues and sector write overload. I just don't have the time to diagnose all of the issues and spend time playing with work-arounds. I have downgraded all of my devices (1...

netispguy

I have three RB4011's. Two RB4011iGS+'s, and one RB4011iGS+5HacQ2HnD. Both of the RB4011GS+'s are connected as the gateway to Comcast Business connections with static IPv4 and IPv6 addresses. One of these is also CAPMAN server for 11 APs. Everything has generally worked good (... well after they sol...

netispguy

Freezer (Greg), Are you seeing this also?

viewtopic.php?f=7&t=145834&p=719369#p719369

netispguy

I now agree. I am seeing strange behavior on the RB4011, but only with the new Apple devices. uggggg......

netispguy

I see what you are saying. We have a full dual stack environment as well. All of our radios are set to "auto" for the frequencies and auto (XXXX) for the center channels. Maybe that is why we are not having any issues? We are stuck with US channel space. What app are you using on your Mac ...

netispguy

I just did a test:::... All examples using 5Ghz 20/40/80Mhz A/N/AC, XXXX center channels and everything running at 6.44 stable. The SSID name (WB-AP) is the same for all. Tested with an iPhone XsMax (IOS 12.1.4) I started off connecting to an OmniTIk (RBOmniTIKPG-5HacD). No problem. Then I connected...

netispguy

I should have mentioned that I am not seeing this on our iPhones XsMax or Xs. I just moved from being connect to an hAP to our RB4011, then into an area with a cAP and back to the RB4011. I did not see anything unusual. Maybe I am not looking in the proper place. Can you show me what the log entry l...

netispguy

I have not seen this issue in my environment. We only have one RB4011 (w/ radios and running 6.44 stable), and 9 various other Mikrotik APs. I don’t see anything in the logs that suggest an interface has crashed.

Has anyone else been able to reproduce this problem?

netispguy

Can you please explain the issue a bit more? I have upgraded all of my devices to 6.44 except our core router. 5GHz @ 80 MHz xxxx is now enabled on all APs. I have only one RB4011 (which happens to be located in my office). I have been moving in and out of 9 AP zones from being attached to the RB401...

netispguy

I have upgraded all of my AP's to 6.44rc4 and everything is finally working with 5Ghz AC! I have not upgraded my core router yet since I have a number of IPsec interfaces (and I want the stable released version for that one.)

netispguy

I installed 6.44beta75 on a spare hAP AC. I don't have time to fully test, but it looks like things are now working correctly for 5GHz-A/N/AC at 20/40/80MHz XXXX!

netispguy

It looks like the fix may be included in the latest beta relaease: 6.44beta75 (2019-Feb-08 08:02). I have not test yet.

netispguy

I don't know why this forum seems to so inconsistently subscribe me to email notifications on replies. In my case, my iPhone XS refuses to use my network period if I have my Hurricane Electric IPv6 tunnel active. I don't know if it is some broken pMTU thing on iPhone XS, which is rather strange as ...

netispguy

Great News! I am looking forward to the release with the fix/work-around. Hopefully soon?

-Scott

netispguy

I received this correspondence from Mikrotik overnight US time. I would say this shows they admit there is an issue; however, their suggestions don’t work for us. I responded the using CAPsMan, or just turning off ac were better workaround while they fix the problem. ———— “Hello, Sorry for the long ...

netispguy

I opened my support ticket on 11-October-18. Since then I have inquired many times. I have received a couple of responses asking for addition details; however, I am not going to post them (because although I am not happy with Mikrotik, I don’t feel I should embarrass them.) My last communication wit...

netispguy

Please don’t force me to use CAPsMan!

I escalated this problem to my distributor. I let him know I am not ordering any new equipment until this is resolved.

netispguy

Apparently Mikrotik is not willing to admit they have an issue with new Apple devices (iPhone XS, iPhone XS Max, iPad Pro 2018) and are playing dummies. I haven’t got any reply to my opened ticket with Mikrotik even tough I have delivered them data from sniffed wireless traffic. It is not my job to...

netispguy

Mikrotik has also stop responding to my open ticket as well. I have an open ticket with Apple regarding this and they are 100% pointing the problem at Mikrotik, claiming they do not have this issue with a single other vendor. I have to honestly say that not withstanding the loss of performance, turn...

netispguy

I had to turn ac off in another location yesterday. Location has active IPv6. I have been unable to simulate this issue on any other platform (e.g, Ubnt, Cisco, etc). Since we have a large of new iPhones, I have suspended ordering new MT until this is resolved. We are not a large commercial customer...

netispguy

@Greg, I am back from Holiday. I will txt you soon. My environment, which has a lot of IPv6 traffic (including IOS devices,) has nine Nest Thermostats and 11 Nest Protects (along with 9 AP's) and will be very difficult filter... My IOS devices appear to have the proper IPv6 addresses for the static ...

netispguy

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

netispguy

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, Ma...

netispguy

MT: ?????

netispguy

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 carr...

netispguy

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 part...

netispguy

MT: Have you still not been able go verify this problem? It has not gone away.

netispguy

Netispguy, great, I’m glad it worked for you. First of all, my MikroTik cAP AC is working in pure bridge mode, zero NAT, zero firewall rules so I don’t believe it is NAT related. I’m suspecting the new iPhone XS is sending DNS requests in different manner - maybe the L2 frame has some extra fields ...

netispguy

Freezer,

What do you think about MT not being able to reproduce the problem?

-Scott

netispguy

Netispguy, thanks for the lecture about IPv6 but I already know that. I’m a system engineer for a large network equipment vendor and I work close with developers - I've seen things people didn't even dream off, so I know what “magic” things can happen under the hood when processing packets (usually...

netispguy

I can also confirm that IOS 12.1 does not fix the problem.

netispguy

Uldis, couple facts that I have observed. Just FYI I'm using "cAP AC" running 6.43.2. - The problem persists even after yesterdays update to iOS 12.1 - I am convinced the problem is in DNS communication (!) - somehow suppressed by Mikrotik cAP AC 802.11ac link - why I think so? - you will...

netispguy

netispguy, thank you for sharing us the information. For now we are unable to reproduce the issue, the websites opens ok, the, speedtest is ok as well. Do you have ipv6 also running or just IPv4? Which DNS server you are using - some local one from the Router our some other public DNS? If you try t...

netispguy

By saying the local traffic works - it works with multiple hops inside your network (no NAT/Masquerade)? So as soon as the traffic goes over the NAT/Masquerade you start seeing the problem? It is possible the problem related to the TCP traffic as the L2TP VPN uses UDP protocol. We are now trying to...

netispguy

Did anyone tried to debug the problem a bit deeper? Like sniffing phone's packets to see what goes wrong. I have tried, but I found nothing conclusive. I have also supplied logs to Apple. Somebody please set my expectations. I have opened a ticket with Mikrotik (Ticket#2018101122002554), but I have...

netispguy

The only common factor for me is ipv6. With it off problem goes away. By 'off' you mean complete disabling of 'ipv6' package or just disabling IPv6 DHCP Server / ND so that devices don't get ipv6 routable addresses? I’m using 6to4 so I disable the sit interface, disable the ip address on the wan an...

netispguy

The only common factor for me is ipv6. With it off problem goes away. Currently running ac at 80mhz and all fine. As soon as I unable ipv6 it dies. If you disable ipv6 also make sure your clients are not being allocated and don’t have an ipv6 address too. I origionally thought it might have somethi...

netispguy

I was asked by support person to check if it is an AC or 80MHz wide channel deciding factor. I did test it and in my case it seems the problem exists also on AC 40MHz wide channel.

I tried the same thing... no change with 40 MHZ wide channel... I still have all AC disabled.

netispguy

It would be really nice if this got fixed!

netispguy

I really hope that the new iPhone Xs/XsMax 5GHz AC problem is resolved before the 6.44 production release. https://forum.mikrotik.com/viewtopic.php?f=7&t=139608&sid=c812125039cd5699bb02c1cae5c96b71 Reading through the topic you've linked to makes me think it is an iPhone's problem, not Mikr...

netispguy

I did set 802.11A/N with 40MHz channel width as a temporary workaround. I believe I have noticed that connecting iPhone XS via VPN over Mikrotik router on 802.11ac radio also "workarounds" the problem. I cannot prove it as I don't have time for this now, but it seems like some MTU/Packet ...

netispguy

I really hope that the new iPhone Xs/XsMax 5GHz AC problem is resolved before the 6.44 production release. https://forum.mikrotik.com/viewtopic.php?f=7&t=139608&sid=c812125039cd5699bb02c1cae5c96b71 Reading through the topic you've linked to makes me think it is an iPhone's problem, not Mikr...

netispguy

This topic is also being discussed in the "wireless" section:

viewtopic.php?f=7&t=139608

netispguy

I really hope that the new iPhone Xs/XsMax 5GHz AC problem is resolved before the 6.44 production release.

viewtopic.php?f=7&t=139608&sid=c8121250 ... cae5c96b71

netispguy

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 ...

netispguy

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...

netispguy

There seems to be another thread about this subject in Wireless Networking: https://forum.mikrotik.com/viewtopic.php?f=7&t=139608&sid=e5df6717fd1a6d0942cc193ef01e5112 Version 6.44beta14 has been released. *) wireless - improved stability for 802.11ac; -->> Confirming that 6.44beta does NOT r...

netispguy

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.

netispguy

@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.

netispguy

Well, another day of frustrated users.... I have had to demote all of my APs 5GHz radios to 5GHz-A/N @ 20/40Mhz (eC). No more AC until this is resolved. Now all the new Apple Xs and XsMax work with no issue; however, every single device (laptops, tablets, etc) are impacted with much less performance...

netispguy

We do not use any IPv6 tunnels. All of our IPv6 is native using a fixed prefix we get from our ISP (Comcast Business).

However, I did report earlier that if you enable a VPN from these new iPhones to our L2TP interface, everything seems to work... which I find very strange.

netispguy

Unfortunately, the units sold in the US are fixed to "united states3" and "regulatory-domain". You cannot buy the international version over here any more. I just got off the phone with Apple engineering, and they are insistent that this is a Mikrotik issue. It's the only manufac...

netispguy

The problem is continuous across all of our Mikrotik APs. I have verified that these Apple devices work across other platforms (Cisco, etc. ). I am dealing with Apple Tier II and III support and they have come to the same conclusion. All I have to do is attach to an 80MHz AC radio and the problem st...

netispguy

12.0.1 does NOT fix the problem. We still have the problem after upgrading both an iPhoneXs and iPhoneXsMax. I have fully tested and we still see the same problem when attached to a 5GHz radio using 20/40/80MHz A/N/AC. Setting the radio to 5GHz A/N does work, at the cost of less performance. It look...

netispguy

+1 for having problems with both the iPhone Xs and XsMax on the Mikrotik framework on 5GHz/80MHz AC. All other iPhones (X, 8, 7), iPads and MacBooks working fine. Running routeros 6.43.2.

netispguy

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 nam...

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