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Some devices have no Internet connection

Message 22 of 22

Hi, I no issues connecting to WiFi but some devices are refusing to get an internet connection. This has only recently started.  Tried different dns servers etc, but still have issue. Reboot router and devices are okay for a few days.  Is this a faulty router ?  I see other threads on here with similar issues and seem to be resolved when they had routers replaced. 

Have the latest router I believe. Sagemcom FAST.


Any ideas except faulty router ?


Thanks Tony




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Message 21 of 22

Hi @Green66,


There is a known issue with the Sagemcom Wi-Fi Hub that can cause DNS resolution errors. This is caused by an issue with the current version of the router firmware, there is a new version in testing at the moment that will resolve this issue, but it is not ready for release yet.


However, you can normally work around that issue by changing the DNS server settings in the router, so if you have tried changing DNS servers and that does not temporarily fix it then you may be suffering from a different problem.


The staff here won't be back until Monday, but they should be able to respond early next week and will be able to check your router and connection for issues. If they did think your router was at fault they would be able to arrange a replacement for you, there is a different model made by Huawei that is not affected by the known DNS issue.


If it is only wireless devices affected then there are a few things you could try to see if it is Wi-Fi interference causing the problems.


Split the SSID's on the router, this will allow you to give the 2.4GHz and 5GHz network bands different names, so your Wi-Fi devices will then see those two networks separately, you can then try connecting to one or the other to see if one gives a more reliable connection than the other. Doing this in itself won’t fix the problem, but it makes it easier to troubleshoot as you can easily see what device is using what band.


Change the channels that your router broadcasts the Wi-Fi signal on, you can use free smartphone Apps like this to see what channels are being used within range of your smartphone, you can then change your router to use channels that are less congested.