Win 10 laptop can't use internet when TP Link is connected to router?

al92

Reputable
Oct 29, 2017
176
0
4,710
We have a Virgin SuperHub 2ac and 50MB Broadband, which works great with both 2G and 5G. However, because of where the fibre connection enters the house, the router is very near the front, and although it's not a big house, connections upstairs towards the back of the house aren't very strong. So, I bought a pair of TP link powerline adaptors and set up an old Sky SagemF@st router (the grey flat version) connected to the TP link upstairs in the back room.

The sky router doesn't act as a direct extender, it shows as a separate network & password, but when you connect to it, it's supplying the internet from our main router. The idea was that you'd simply connect to Sky12345 instead of VM12345-2G or whatever. That aspect of it works perfectly.

However, a few days after I set it up, we found that this has created a problem with our Virgin network. If the eithernet cable to the TP link downstairs is plugged into to the Virgin Hub, and therefore supplying a broadband connection to the Sky router upstairs, then some laptops running Windows 10 which are still connected to the Virgin 2G or 5G networks will show 'Connected, No Internet'. Unplug the ethernet cable from the Virgin router and boom, internet is back for everyone.

What's oddest is that it only affects some laptops:
- My macbook, my work laptop running Win 7 Enterprise and my Dad's work laptop on Win 10 are all fine
- My mum's laptop, running Win 10 Home, will never get internet if the ethernet to the TP link is plugged in
- My laptop, running Win 10 Home, gets an intermittent internet connection which regularly drops.

Does anyone know why having a TP Link Powerline connection to a second router should cause the internet connection to become unreliable for some, but not all laptops? Can the powerline adaptors cause problems, or is it something to do with having two routers active?

Thanks very much

 
Solution
There are two possibilities. First if you have the cable from the MAIN router connected to the LAN ports of the SagemFast router, then you could have two DHCP servers on one network. That would be bad. You need to be sure the SagemFast is configured as an access point -- http://www.tomshardware.com/forum/36406-43-convert-wireless-router-wireless-access-point
The second possibility is that you have an IP conflict. I think this is the less likely possibility.

kanewolf

Titan
Moderator
There are two possibilities. First if you have the cable from the MAIN router connected to the LAN ports of the SagemFast router, then you could have two DHCP servers on one network. That would be bad. You need to be sure the SagemFast is configured as an access point -- http://www.tomshardware.com/forum/36406-43-convert-wireless-router-wireless-access-point
The second possibility is that you have an IP conflict. I think this is the less likely possibility.
 
Solution