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Forum Discussion
Information on connecting to your new ISP modem/router
Good morning, in the area where I live they've installed pure FTTH fiber optics, so my ISP will be changing my router. I have an Orbi RBK 753 system in router mode connected to the LAN port of my current ISP's modem/router and to the WAN port of the Orbi router. I'm attaching photos with the current Orbi router settings. The WAN IP address is taken from the DHCP server of my current ISP's modem, and I've set the DNS to Google's. I'd like to ask, when I install the new ISP modem/router, which also has DHCP, and leave these settings on the Orbi router, as soon as I connect it to the new modem/router, the Orbi automatically takes the new IP address and everything works perfectly as it does now. Right? Thanks for the replies.
5 Replies
Depends on what the ISP router uses for it's IP address, maybe 192.168.1.1 which is default for most NG router systems, however NG router systems and auto adjust for this.
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.
Static IP Address Configuration for AP Mode | NETGEAR Communities
https://kb.netgear.com/31218/How-do-I-configure-my-Orbi-router-to-act-as-an-access-pointand https://www.youtube.com/watch?v=H7LOcJ8GdDo&app=desktop
Try option #2 first...
Hi, thanks for the reply, I don't care about the double Nat for the use I make of it, that's how it is now too. Sorry, but the image with the Netgear Orbi WAN settings hasn't loaded. It won't let me. Anyway, I'll list all the settings below:
ISP ROUTER IP CLASS: 192.168.1.1. The new router also uses this IP class.
NETGEAR ORBI IP CLASS: 10.0.0.1
ORBI WAN SETTINGS:
WAN SPEED: 1GB/S
WAN AGGREGATION: OFF
CONNECTION REQUIRES LOGIN DETAILS: NO
OBTAIN AN IP ADDRESS DYNAMICALLY FROM ISP: YES
USE THESE DNS SERVERS: I SET GOOGLE'S 8.8.8.8 - 8.8.4.4
USE DEFAULT MAC ADDRESS: YES
These are the WAN settings I currently have on the Netgear Orbi. So when I connect the Netgear orbi with these settings to the new ISP router that has DHCP, the Netgear orbi will get the new WAN IP address from the new ISP router, right? Thanks for the reply.
Yes. The Orbi router will connect to the new ISP device and should function as before. There is one potential situation to be aware of. (that annoying Forum bug that does not let users past images into posts if frustrating).....
The default for Orbi routers is to create a LAN with the IP subnet 192.168.1.x through 192.168.1.254, with the router keeping 192.168.1.1 for itself.
However, if the ISP router has assigned an IP address to the Orbi WAN port that is part of 192.168.1.x, then the Orbi cannot use that for its own LAN and instead creates the LAN 10.0.0.x and keeps 10.0.0.1 for itself.
My impression is that the previous ISP did this and caused the Orbi to create 10.0.0.x
If the new ISP router does exactly the same, then the Orbi will run exactly as it does not.
If the new ISP router assigns the Orbi WAN port an IP in a different subnet, then it is not entirely clear how the Orbi will respond.
This will make no difference unless you have reserved IP addresses for devices that may no longer be part of the LAN IP subnet.
Hi, thanks for the reply. The Netgear Orbi automatically changed the IP address on the Orbi to 10.0.0.1 when I first set it up. I remember getting a message saying it had the same IP address, and it suggested changing it to 10.0.0.1, which I accepted, and it changed. What I want is for the Netgear Orbi to automatically get an IP address from DHCP when I connect it to the new ISP router. Is that correct? For example, it's like a DHCP client when it connects (smartphones, etc.).
If the new ISP router assigns the Orbi WAN port an IP in a different subnet, then it is not entirely clear how the Orbi will respond.
FWIW, I've tried this. If the WAN subnet matches the LAN subnet configured in the Orbi, then the Orbi will change the LAN subnet to a different private address space. It also changes address reservations, etc so everything is aligned with the new address space.
What I want is for the Netgear Orbi to automatically get an IP address from DHCP when I connect it to the new ISP router.
It does that by default. Note that IP address is only for the WAN interface. The LAN subnet is different (and set described above). Almost certainly you'll still have a 10.0.0.x LAN subnet after the switch, unless your new ISP gateway happens to default to that address. That would be rare, as ISP routers almost always default to 192.168.0.x or 192.168.1.x.
