I have a TP-Link Archer VR2800 router which has been working perfectly for 3 years up until now. For the past few days whenever a device attempts to connect to the 2GHz Wi-Fi it fails because it cannot get an IP address. However, the 5GHz Wi-Fi has been fine. The 2GHz has 7 devices connected whilst the 5GHz only has 2. There is a separate router downstairs for a business line but I've not had issue with the two. We live in an end of terrace property so Wi-Fi/signal saturation should be less. The router has the latest firmware: Firmware Link Attempted fixes 1) Rebooting the router. This works temporarily but then the issue re-occurs and it's happening more frequently (it used to be once a day now it's every few hours). 2) Factory reset Any idea what might be causing it? Is it the DHCP server not re-issuing licenses/IP addresses to each device? Any help would be appreciated, cheers!
Change the 2.4Ghz channel, I had problems at home with my heating going out (wireless Hive controller) and the smart meter loosing connection and crashing plus other connection issues ever since installing Sky broadband, tried a new router, did not fix it, changed wifi channel from 1 to 6 all problems went away.
Both the 2GHz and 5GHz channels are set to automatic but this hasn't been an issue before. I'll try this and see what happens. Cheers!
I use this app to determine the channels that the wi-fi is on in my house (and to see the channels the neighbours devices are on): https://play.google.com/store/apps/details?id=com.etwok.netspotapp
Yup same for me, I don't normally fix channels but scouring the net suggested many were having problems with Hive and connectivity and changing channel sorted it, can't say why, but it worked for me, some some sort of co-existance issue, hope it is similarly simple for you.
Thanks very much guys. I did wonder before posting whether it was channel selection but discounted this as when testing it would say it cannot obtain IP, which you'd associate with DHCP or something. I've set the channel to 4 and will let you know how it goes. Thanks @Fingers66 for the app suggestion.
Unfortunately the issue remains. I tried switching off both Wi-Fi connections, assigning channel 6 to the 2GHz then re-enabled both. But it wouldn't work. I then switched both off again, changed 2GHz to channel 11 then rebooted the router and it's working again for now. I've looked at the settings but can't see an option that manages IP address allocation for Wi-Fi. As that is the only cause I can think of. There are four nearby (2GHz) Wi-Fi connections: 1 is our other router, 1 is the printer and 2 others are next door's router and extender. I will use that app later when I'm back to see if there's signal saturation.
The issue's resolved for me now. I posted on the TP-Link community forums and one of their staff suggested I change the channel, channel width and re-name the SSID. I did all that and also switched off the Netgear range extender (I forgot to mention it!). Now it's all working. I think the issue must be with the extender as it's old and after I did a factory reset on it, I still couldn't connect to it with the same error "cannot obtain IP address". Luckily I have a spare TP-Link extender which I'm using. Thanks again @Fingers66 for suggesting the NetSpot - WiFi Analyzer app as I didn't realise how many neighbouring Wi-Fi connections there were, also being able to see what channels they're on is handy to avoid any conflicts Cheers
