Question Connection fine when on 802.11n, but get "dns cannot be resolved" errors when connecting on ac?

[Dusiue]

I just bought a gigabyte gc-wb1733d-i wifi and bluetooth pci card for my pc, and have a virgin media hub 3 router.
Been having issues all evening, when connecting to the network I initially have a strong connection, then it quickly cuts out and gives an error saying that the dns cannot be resolved.
I tried updating and rollback drivers, cleared dns cache, then tried to connect to phone hotspot which worked fine.
That was on a 802.11n network though, so I changed the wireless mode in the device properties from ac to n and attempted to connect to my home network again.
It now works fine, just with a slightly slower speed. I would really like to get 802.11ac working though as both the router and wifi card are capable and I am paying for faster speeds than I receive through 802.11n.

Any help would be really appreciated.

 

[Ralston18]

Interference perhaps.

What frequency and channels are you using?

Update your post with more information about your network and the number of devices connected. Remember that range and obstacles matter.

If there is interference the connectivity will be lost and devices cannot find each other - all the worse when those disconnections are intermittent.

The DNS error is a good clue as to what may be happening.

Before doing anything else read the following link:

http://www.steves-internet-guide.com/dns-guide-beginners/

Run and post the results of "ipconfig /all" via the command prompt.

 

[Dusiue]

Interference perhaps.

I think that was the issue.

I noticed that my wireless mouse would occasionally have small blips where it wouldn't track properly, which wasn't happening before when I was using powerline ethernet.

I've moved both the receiver for the mouse and the antenna for the wifi card and haven't had the issue since so hopefully it is fixed!

I'll update the post if the issue arises again.

Never mind, literally 2 mins after I posted this it stopped working again.

I believe my mouse uses 2.4 ghz which could have explained the blips when I was using 802.11n, but still doesn't solve the issue with running on ac.

It was odd though that it worked for a couple minutes then came back again?

5 ghz is on channel 44,
2.4 ghz is on channel 11

 

[Ralston18]

Another thing to troubleshoot is the IP addresses.

Take a look at the IP address of all connected devices. Especially if you have any static IP addresses assigned.

If you have indeed assigned any static IP addresses ensure that those addresses are outside of the configured DHCP IP address range and reserved for the designated device via the device's MAC.

Are you able to run "ipconfig /all" (without quotes) via the Command Prompt and post the results?

Curious about the DNS Server setting IP.