Error connecting ORBI CBR40 to att fiber 5268AC

[poko]

Hello, 

I am trying to connect my orbi CBR40 to my ATT fiber modem (5268AC) via DMZplus.   When I try to "choose" the orbi, I get an error saying I have to put the orbi in DCHP mode because static IPs are not allowed.  How do I do that?  

Thanks! 

[FURRYe38]

The CBK40 system is meant to be a replacement for any ISP cable modem which the ISP supports the CBK40 on there system. The CBK40 doesn't operate as a wifi router only. If you need a Orbi system for it's wifi features, I recommend the RBK series of Orbi. There are many flavors of RBK systems that will suite your needs. These run as external routers to ISP modems. 

https://www.netgear.com/orbi/default.aspx
https://www.netgear.com/orbi/wifi-systems.aspx
https://kb.netgear.com/000038220/What-are-the-hardware-specifications-of-the-available-Orbi-WiFi-Sys...

Also regarding SIP Modem Combo Units:
This would be a double NAT condition which isn't recommended. https://kb.netgear.com/30186/What-is-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

Good Luck. 

---

@poko wrote:

Hello, 

I am trying to connect my orbi CBR40 to my ATT fiber modem (5268AC) via DMZplus.   When I try to "choose" the orbi, I get an error saying I have to put the orbi in DCHP mode because static IPs are not allowed.  How do I do that?  

Thanks! 

---

[poko]

Thanks for the answer.  I am trying to do your #2 suggestion, but 5268AC keeps seeing my CBR40 as a static IP and gives an error when I try to DMZplus.   Orbi is showing up as DHCP enabled so I am stuck.  

[FURRYe38]

You can't do those suggestions with the CBK40. The CBK40 is a replacement modem for your ISP provided modem. The CBK40 requires the connection of the RG6 coax cable line from the ISP to the CBK40 in back.

If this doesn't work, you'll need to get in to a RBK Orbi system and return the CBK40 system. 

---

@poko wrote:

Thanks for the answer.  I am trying to do your #2 suggestion, but 5268AC keeps seeing my CBR40 as a static IP and gives an error when I try to DMZplus.   Orbi is showing up as DHCP enabled so I am stuck.  

---