Devices connected to the orbi rooter & with devices connected to the internet

[Rodi]

Hello,
 
I need help with network configuration. I must admit that I am not at all competent on the subject. I have just purchased and installed an ORBI RBS750.
My orbi rooter is connected to my livebox(internet box) as rooter. So I have 2 rooters: the one from the livebox with addresses in 192.168.1.x and the one from the orbi in 10.0.0.x.
I would like to keep the LAN ports of the livebox active (as a reminder they are limited to 1 Gbps when my fiber shows at 1.5). This therefore allows me to have the possibility of using all my bandwidth and I would like to be able to access a hard drive connected by USB to the box.
My question, how to make so that the network of the orbi can access the network of the Livebox?
I imagine that you have to configure a VLAN which receives me at least at my DD via the sharing and the IP of the box.
 
Thank you in advance for your help.

[FURRYe38]

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Your ISP Modem already has a build in router and wifi. This would be a double NAT (two router) 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

If you want the Orbi on the same network as your ISP router, then try option #3 on the Orbi RBR. 

@Rodi wrote:

Hello, I need help with network configuration. I must admit that I am not at all competent on the subject. I have just purchased and installed an ORBI RBS750. My orbi rooter is connected to my livebox(internet box) as rooter. So I have 2 rooters: the one from the livebox with addresses in 192.168.1.x and the one from the orbi in 10.0.0.x. I would like to keep the LAN ports of the livebox active (as a reminder they are limited to 1 Gbps when my fiber shows at 1.5). This therefore allows me to have the possibility of using all my bandwidth and I would like to be able to access a hard drive connected by USB to the box. My question, how to make so that the network of the orbi can access the network of the Livebox? I imagine that you have to configure a VLAN which receives me at least at my DD via the sharing and the IP of the box. Thank you in advance for your help.