That is right, if you have an existing router with an IP address of 192.168.1.1 that has the same IP address as your NETGEAR router, the device will automatically adjust itself to 10.0.0.1 or 172.16.0.1 to avoid conflict for your existing network.
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Find the default login, username, password, and ip address for your Netgear router. You will need to know then when you get a new router, or when you reset your router.
Netgear Router Setup Guide (Login IP Address) - How to Sep 08, 2018 Reset Netgear IP Address - PCTechBytes
Page 63 Type ipconfig /all Your IP Configuration information will be listed, and should match the values below if you are using the default TCP/IP settings that NETGEAR recommends for connecting through a router or gateway: • The IP address is between 192.168.0.2 and 192.168.0.254 •
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