Fritz!Box 7490 - 5Ghz network drops out

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KiwiJaz

31 posts

Geek
+1 received by user: 5

#190836 14-Jan-2016 10:08

I just purchased a 2D Fritz!Box 7490 with hopes of improved wireless speed on my 802.11.AC devices (iPad, Samsung Tab S2, Vodafone Prime).

I assigned unique SSID's to the 2.4Ghz and 5Ghz networks and my AC devices connected to the 5Ghz fine and I noticed better performance etc.

However after a while, that network drops and my AC devices need to join the 2.4Ghz network (e.g when I try to rejoin the 5Ghz network it just keeps trying but can't connect).

Sorry, I emailed my screenshots of the setup from home to work but the email didn't get through, but I noticed some messages in System relating to the 5Ghz band entering Power Saving mode as it detected no devices on that network were active (this would have being after my devices have been inactive and entered power saving mode).

I have upgraded my Fritz!Box OS from 6.20 to 6.30 (the latest available) in accordance with the troubleshooting info on the Fritz!Box website and it still has the same result.

If I restart the Fritz!Box I can then connect to the 5Ghz network again.

Has anyone else experienced this?

KiwiJaz

31 posts

Geek
+1 received by user: 5

#1471239 14-Jan-2016 18:49

The messages in the Fritz!Box event log are:

22:38:27 Wireless LAN registration failed (5GHz): Access check failed. MAC address: xxxxx (this is one of my 802.11.AC devices' Mac address).
22:38:23 Wireless LAN device registered: Reactivating wireless LAN at full power (5GHz).
22:37:54 No wireless LAN device registered any more: Reducing power consumption (5GHz).

Wireless LAN registration failed: Authorization failed. MAC address: [MAC address].

This is an event message from the "WLAN" area.

The status message informs you that the MAC address filter is switched on and that a wireless LAN device not permitted in the list of known wireless LAN devices is attempting to register with the given wireless radio network of the FRITZ!Box.

Hatch

816 posts

Ultimate Geek
+1 received by user: 57

#1490022 10-Feb-2016 22:52

I don't know if you got this sorted but I had the exact same problem since a couple days ago with my 7490, which I appear to have now sorted.

My surface pro which had previously been one of only two devices connected to the 5ghz network suddenly "could not connect to network".

After trying some surface pro fixes (By this stage I discovered that both 5ghz devices were unable to connect.), called 2D tech support, reset 7490 to factory - nothing worked. Further googling and I found this german page:

http://www.pcwelt.de/tipps/Rechner-baut-keine-Verbindung-zur-Fritzbox-auf-8921671.html

After reading this via google translate What the hell - I manually set the 5ghz channel in my case from 36 to 40; voila both the Surface Pro and other PC could both now connect to the 5ghz.

Note that after discovering and testing this fix, I restored 7490 to original state via backup (with custom setting etc) and 5ghz continued to work fine.

sbiddle

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#1490076 11-Feb-2016 07:21

Due to the huge number of 5GHz channels it's easy to set an AP to a channel that a device may not necessarily support due to it's country code. This is the exact same issue that happens in the 2.4GHz band where channel 13 is allowed in NZ but many devices out there are hardcoded to the US and only support 1-11.

First thing would be to check that this isn't the issue.

KiwiJaz

31 posts

Geek
+1 received by user: 5

#1490127 11-Feb-2016 08:59

Ahh...interesting.

Thanks for the posts guys. Yes, It did seem to be an issue when I was using the default channel (I think it may have been 1). When I changed it to 36-40, it was a lot more stable and haven't had any further issues. Mind you, the other most used device (my wife's iPad) is connecting to the 2.4 network - not sure if it was an issue when we were both on the 5Ghz network - should probably test that.

Thanks again.

Geoboi

5 posts

Wannabe Geek

#1536107 19-Apr-2016 22:42

Thanks so much Hatch! My Fritzbox was driving my nuts with the wireless AC always dropping out! Adjusted mine to channel 40 and it works perfectly. Thanks again.

Hatch

816 posts

Ultimate Geek
+1 received by user: 57

#1536626 20-Apr-2016 13:48

Geoboi:

Thanks so much Hatch! My Fritzbox was driving my nuts with the wireless AC always dropping out! Adjusted mine to channel 40 and it works perfectly. Thanks again.

ALL GOOD, thanks to the Germans.

Quic Broadband

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geekiegeek

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Inactive user

#1543527 28-Apr-2016 17:15

Yay, I now have AC goodness!