Question

Need to use 2 different DNS on one router

Help! I have been trying to find a way to route different devices on my home network through 2 different DNS addresses (2 Rokus through 1 DNS and all other traffic through the other).

I keep seeing subnets and DHCP pools as a potential solution but I have no idea how to configure these. Can anyone give me an idea how to get this happening?

My router is a Dlink AC3200 if that helps?

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Answer
Re: different DNS

Then define the DNS on your devices in stead of in the router.

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Roku doesn't allow for DNS configuration

Roku devices don't allow DNS configuration when setting up wifi connections.

As a result, I currently have the DNS (to access American content on the Roku) added at the router level but this is now impacting my ability to access local content on my other devices.

I've configured my ISP's DNS on my television for the local apps used there but have found that the streaming performance is now terrible as a result (where it works perfectly when I remove the other DNS from the router).

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Flip it around.

Setup the router for the Roku and on other things use the other DNS.

By the way discussions like this risk a lock due to forum policies. Be careful.

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Performance issues

Thanks for the response... I did flip it but that's where the performance issues have crept in so I thought trying another approach might work... Thanks anyway.

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Forgot to note prior research.
https://www.google.com/search?q=roku+set+dns

As you are now pulling content across an ocean, performance for say Netflix is not a sure thing. The caching servers in your country have no reason to cache the content so no one expected this to work well. Can be upsetting to those new to how the web works.
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Answer
You seem to be confusing DNS work with "traffic".

While Kees is right about setting the DNS as you please in the devices, it should have little to no impact on performance.

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