RBR750 Magenta ring LED, internet working, no web admin access!

[claudiut]

Hello,

Like many others with RBR750 (+2 satellites) I've downgraded to firmware 3.2.18.1 due to latest firmware issues. About an hour ago I've powered down everything to clean up the wire mess in my utility room where the ISP router is, as well as the RBR750.

When I've powered up again (first the ISP router and then the RBR750) I've got the ring LED magenta (solid). As far as I know this means Orbi can't get an IP address from ISP router; I've tried to power cycle a few times but same result.

The weird thing is that wifi seems to work fine; I have not powered up any satelites although I suspect they won't be able to connect.

Also, I can't access the RBR750 on 192.168.1.1 which I was able to before with no issues.

Any ideas how can I get everything back to normal? I'm more concerned that I don't have access to the web admin interface.

[plemans]

What ISP gateway is it connected to? 

You've implied it has its own routing capability. 

That can cause a double nat. 

A double nat happens when you cascade more than 1 router.

It can also cause the router to use a different IP address if it detects the ISP gateway using the same ip address.

https://kb.netgear.com/30186/What-is-Double-NAT

Fixes? There’s 3 options but only use 1.
1. Put the modem/gateway in modem only/pass through mode. This disables its routing functions.
2. Leave the modem/gateway in router mode but put the Netgears IP address into its DMZ. This forwards the data to the netgear. You can either leave the modem/gateway’s wireless enabled or disabled. Just make sure its using a different wifi channel to prevent interference
3. Put the Netgear into access point mode. This disables its routing functions. Wifi/ethernet still works but it does disable some features.
https://kb.netgear.com/26765/Which-features-are-disabled-on-my-NETGEAR-router-when-it-is-set-to-AP-M...