Can't get my Orbi Satellites to connect after switching to ATT Fiber

[dmgalloway]

I just switched to ATT Fiber internet. My current set up is an ATT BGW320-500 for a gateway and an Orbi RBR50 with 2 RBS 50 satellites. The Gateway is now in Passthrough mode with the Wi-Fi turned off and the RBR 50 is in AP mode. Internet is fine, but I can't connect the satellites to the RBR 50. I read that the satellites wont connect  without a DCHP server, but I can't find a procedure on how to do that. Any suggestions? I also read to make a rule on the gateway firewall to allow the satellites to ping the gateway, but again, I can't find a procedure. Any suggestions would be greatly appreciated

[FURRYe38]

Disable IP Pass-thru on the ISP gateway if you are using the Orbi system in AP mode. IP Pass thru on the ISP gateway router if for use with the Orbi system in router mode. 

Your ISP Modem already has a built 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
Try option #2 first...
https://kb.netgear.com/000061277/Which-features-are-disabled-on-my-Orbi-router-when-it-is-set-to-AP-...

[michaelkenward]

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@dmgalloway wrote:

I just switched to ATT Fiber internet. My current set up is an ATT BGW320-500 for a gateway and an Orbi RBR50 with 2 RBS 50 satellites. The Gateway is now in Passthrough mode with the Wi-Fi turned off and the RBR 50 is in AP mode.

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One or the other.

Put the  ATT BGW320-500 into bridge mode, and leave the Orbi in router mode.

att bgw320-500 bridge mode - Google Search

Or use the ATT BGW320-500 as a router with the wifi turned off – leaving it on won't do any harm beyond on confusing other things on the network – and put the Orbi into AP mode.

You will hit this:

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

But your router should deliver what you need. If not, try the "bridge mode" option.

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I read that the satellites wont connect  without a DCHP server, but I can't find a procedure on how to do that.

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Not sure where you read that. It is wrong.

One issue with AP mode is finding the IP address of the Orbi when it is running. One way around that is to look on the page in the graphical user interface  (GUI) where you put it into AP mode and ignore the advice not to fix the IP address.