hAP AC WiFi dropping out and unable to use with modem in passthrough mode

RouterOS Beginner Basics
1

Hi all,

I’m new to the Mikrotik range, but not to computers in general having spent the last 16 years working in the industry in various roles.

I recently wanted to upgrade my TP-Link Wireless Router that was struggling with the 15 wireless devices that we have in the house, and replace it with a more appropriate combination that could grow and adapt as my family get older.

This weekend, I made the switch to a Netgear DM-200 ADSL/VDSL Modem/Router and a Mikrotik hAP AC. I connected them as follows:
HomeNetwork - Page 1.png
I’ve had real issues with the WiFi connection dropping out on both 2.4Ghz and 5Ghz, even though a scan of the local area shows that the hAP is finding channels that are less busy and auto-configuring the WiFi to listen there.

I’ve also not been able to configure the DM-200 to pass through to the hAP directly, although I believe that this is possible and that the hAP can negotiate the VDSL connection credentials on behalf of the modem.

Whilst I don’t expect anyone on here to give me detailed configurations, I’d really appreciate it if you could point me towards the relevant parts of the documentation that might help me - there’s a lot of reading on the wiki and I’m not sure which pages affect the above and which don’t!

Thanks in advance,

Matt

2

Further information on my setup:

  • Primary OS on laptops etc. is Linux (either Ubuntu or arch depending on when they were installed).
  • Ping running whilst connectivity issues are occurring from a device on the network to the hAP via WiFi does not appear to show any packet drops
  • Putting the DM-200 into modem only mode appears to break all the things (no connectivity at all), however, this appears to be a common issue (https://community.netgear.com/t5/DSL-Modems-Routers/Netgear-DM200-in-quot-modem-only-quot-mode-with-BT-Home-Hub-4/td-p/1219433)
  • The logs that I have found so far via WebFig show clients registering and staying connected, there do not appear to be any entries that might suggest an issue on the hAP that is causing this.
3

Bump… (I’m struggling to believe I’m the only person with this issue! :slight_smile: )

4

Hi there,

We use the DM200’s in bridge mode quite successfully with Mikrotik devices on both ADSL & VDSL connections. Could I please get you to provide the output of the below command on the hAP ac:

/interface export hide-sensitive

Also what version of RouterOS are you using? And which firmware version on the DM200?

Cheers

5

Thanks for the reply.

I’ll provide the information as soon as I can connect to the device (probably Friday night/Saturday morning as I’ve had to connect the old solution back up whilst I work out how to troubleshoot this)

6

Hi, apologies for the delay in responding, I work away during the week and I’ve only just managed to get everything plugged back in and working!

Output from that command is as follows:

# aug/18/2017 21:17:28 by RouterOS 6.35.4
# software id = CZ2J-TUV6
#
/interface bridge
add admin-mac=64:D1:54:43:8F:01 auto-mac=no comment=defconf name=bridge
/interface ethernet
set [ find default-name=ether2 ] name=ether2-master
set [ find default-name=ether3 ] master-port=ether2-master
set [ find default-name=ether4 ] master-port=ether2-master
set [ find default-name=ether5 ] master-port=ether2-master
/interface wireless
set [ find default-name=wlan1 ] band=2ghz-b/g/n channel-width=20/40mhz-Ce country="united kingdom" disabled=no distance=indoors frequency=auto mode=ap-bridge ssid=\
    doics wireless-protocol=802.11
set [ find default-name=wlan2 ] band=5ghz-a/n/ac channel-width=20/40mhz-Ce country="united kingdom" disabled=no distance=indoors frequency=auto mode=ap-bridge ssid=\
    doics_5g wireless-protocol=802.11
/interface wireless security-profiles
set [ find default=yes ] authentication-types=wpa-psk,wpa2-psk mode=dynamic-keys
/interface bridge port
add bridge=bridge comment=defconf interface=ether2-master
add bridge=bridge comment=defconf interface=sfp1
add bridge=bridge comment=defconf interface=wlan1
add bridge=bridge comment=defconf interface=wlan2
/interface wireless snooper
set channel-time=0ms receive-errors=yes

The NetGear firmware version is V1.0.0.44, and the RouterOS appears to be 6.35.4

FWIW, it does seem to be behaving at the moment, however the modem is acting as a router as well, so I have 192.168.x.x/24 connecting the modem to the hAP, then 10.x.x.x/24 connecting all my devices to the hAP

7

Hmmm, for some reason, I can get to almost all of the internet apart from the BBC.

http://www.bbc.co.uk/news/world-us-canada-40980994 just returns an “empty response” browser error, yet I can view it on my phone via 4G.

8

I’d recommend dropping the channel width on 2.4GHz back to 20MHz. Other than that things look OK.


I’d also strongly recommend upgrading to the latest current release of RouterOS. 6.35.4 is over a year old and there have been many fixes on the wireless side of things since then.

9

Now that sounds a bit like an MTU issue. I can’t see from that interface export exactly how you connect to your ISP. I’m guessing it’s just IPoE/DHCP?

I’d be interested to know the results of the below test. Then we can maybe create a firewall rule to clamp the MSS.
http://www.letmecheck.it/mtu-test.php