There is a "Reboot" option on the Orbi web interface, Advanced Tab Home Page. Also, powering off and back on will cause the Orbi to request DHCP. There is probably a telnet command, but I have not found it.
This forum has been a great place to learn things about networking. My experience also has been that "releasing" an IP using DHCP and then asking for a lease usually results in getting the same IP.
The Orbi web interface provides a place to test this. The Internet Setup page allows the user to specify any MAC address for the Orbi to use. My guess is that this is a mechanism to allow the Orbi to impersonate the previous router, so that the ISP is unaware that the customer has swapped in a new router. (I have no idea how one would come up with a MAC address that is 100% guaranteed not to duplicate an existing MAC address, but the chances are pretty low.)
I'm still interested to learn what has caused the request.
What is the Mfr and model# of the ISP modem the NG router is connected too? Built in router here by chance? If so, This would be a double NAT condition which isn't recommended. https://kb.netgear.com/30186/What-is-Double-NAT https://kb.netgear.com/30187/How-to-fix-issues-with-Double-NAT Couple of options, 1. Configure the modem for transparent bridge or modem only mode. Then use the Orbi router in router mode. You'll need to contact the ISP for help and information in regards to the modem being bridged correctly. 2. If you can't bridge the modem, disable ALL wifi radios on the modem, configure the modems DMZ/ExposedHost or IP Pass-Through for the IP address the Orbi router gets from the modem. Then you can use the Orbi router in Router mode. 3. Or disable all wifi radios on the modem and connect the Orbi router to the modem, configure AP mode on the Orbi router. https://kb.netgear.com/31218/How-do-I-configure-my-Orbi-router-to-act-as-an-access-point and https://www.youtube.com/watch?v=H7LOcJ8GdDo&app=desktop
Be way to release and renew would be to turn OFF the Orbi RBR for 1 minute. Also I would power OFF the ISP modem/ONT for 1 minute as well. This can sometimes cause the modem to get a new IP address from the ISP.
