Netgear Nighthawk AX5400

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mark62933 wrote:

Problem..The Internet port has an IP address of 10.128.128.14/23 I need to have the router pass out IP address in the range of 10.128.128.200 - 10.128.128.254/23 when I go into Advance>>LAN Setup and change the IP address to 10.128.128.200/23 I get the IP conflict message.

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Which "Internet port" is this?

Which Netgear device are we talking about?

AX5400 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.

As plemans says, what you are seeing is a typical example of double NAT.

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

This explains some of the other drawbacks.

What is Double NAT? | Answer | NETGEAR Support

Unless you have specific reasons for using two routers – to create two separate networks for example – it is often easier to use just one router and then to set up the second router as a wifi access point (AP) with a wired connection to the main router. Netgear advises this, as does just about every site you will visit.

How do I change my NETGEAR router to AP mode? | Answer | NETGEAR Support

But that has its own drawbacks:

Disabled Features on the Router when set to AP Mode | Answer | NETGEAR Support