Nighthawk MR-80

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BES-va wrote:

I am trying to install a MR-80 mesh system to run in parallel so guests have one network and my business is supported by the other. 

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That is a recipe for trouble. You cant just pile router on router. "In parallel" doesn't work with a single Internet connection.

Two routers on your network can cause headaches. For example, you can end up with local address problems. Among other things, the other router can misdirect addresses that the Netgear router usually handles, such as routerlogin.net or the usual IP address for a router, 192.168.1.1.

This explains some of the other drawbacks.

What is Double NAT? | Answer | NETGEAR Support

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BES-va wrote:

I have an existing network that uses a Cable modem (CM1150V) and a Nighthawk AC1750 router.

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Which router is that?

AC1750  is not a unique Netgear model number. Many devices come with the AC/AX tag, but it is essentially a label that Netgear, and others, attach to hardware to describe wifi speeds.

Look at the label on the device for the Model Number. And, if there is one, include the "V" bit to show the hardware version. If there is no V number, then you have V1.

If you are trying to run a business operation to keep things apart, then you should look for a network designed for that purpose. You can't just throw together a few domestic devices. That's why Netgear has a line of business devices.

Start by defining what you want to do, and, probably more important, why you want to do it. Then look for kit to do that.

If it is a simple case if giving visitors wifi access, then you could look at "guest networks". Manuals are always a good place to start.

Visit the support pages:

Support | NETGEAR

Feed in your model number and check the documentation for your hardware.

Check the manual for guest network.