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Forum Discussion
RBR750 DHCP
I have an Orbi RBR760 connected to my cable modem, also Netgear. My network Gateway / DHCP is 10.0.0.x. Works as advertised, most of the time. However, I noticed a number of connected devices that...
Thanks for the replies
The Modem is a Nighthawk AX6 (CAX30). WIFI disabled (in all of the many places it shows up). I have tried to turn off the router mode, the Orbi end of things then stopped working. I had to factory reset the Nighthawk to get back online. It does have a 170.x.x.x ip address from my ISP. DHCP for the LAN is 192.168.1.x the scope allows for only two IP addresses. firmware v1.4.10.8
RBR750 is in Router mode. Firmware v4.6.5.14, one satellite. Used to have two, one refuses to do anything, so I unplugged / deleted it. DHCP scope is 10.0.0.2 - 10.0.0.77
When I look at attached devices there are 6 that have 192.168.2.x for an IP address, and to add to the mystery, they all work / internet / all good. They show a gateway of 192.168.1.1 ARP -a presents me with the Orbi MAC address.
What I do not have is the DHCP scope of 192.168.2.x configured on any device on the network. Even if I was, it shouldn't work. I used to be a Banyan / Cisco network engineer, so this bother me.
While my Bandwidth and connectivity with the Orbi has been great, I find them extra special flakey.. I had a firmware problem last winter and Supports only answer was to do a hard reset. If I can't run this down, I may have to put the Orbi stuff on craigs list and go purchase something better.
Modem mode on the CAX would be recommended. If you set this, the modem should reboot and if you power OFF the RBR while it's in router mode, it should get a clean WAN IP address from the modem. Thus by passing all the double nat issues that you seem to be having.
I recommend trying the CAX modem in modem mode and the RBR in router mode.
https://kb.netgear.com/27191/How-to-set-the-cable-modem-router-to-be-on-modem-only
costler wrote:
Thanks for the replies
The Modem is a Nighthawk AX6 (CAX30). WIFI disabled (in all of the many places it shows up). I have tried to turn off the router mode, the Orbi end of things then stopped working. I had to factory reset the Nighthawk to get back online. It does have a 170.x.x.x ip address from my ISP. DHCP for the LAN is 192.168.1.x the scope allows for only two IP addresses. firmware v1.4.10.8
RBR750 is in Router mode. Firmware v4.6.5.14, one satellite. Used to have two, one refuses to do anything, so I unplugged / deleted it. DHCP scope is 10.0.0.2 - 10.0.0.77
When I look at attached devices there are 6 that have 192.168.2.x for an IP address, and to add to the mystery, they all work / internet / all good. They show a gateway of 192.168.1.1 ARP -a presents me with the Orbi MAC address.
What I do not have is the DHCP scope of 192.168.2.x configured on any device on the network. Even if I was, it shouldn't work. I used to be a Banyan / Cisco network engineer, so this bother me.
While my Bandwidth and connectivity with the Orbi has been great, I find them extra special flakey.. I had a firmware problem last winter and Supports only answer was to do a hard reset. If I can't run this down, I may have to put the Orbi stuff on craigs list and go purchase something better.
FURRYe38 wrote:
Modem mode on the CAX would be recommended. If you set this, the modem should reboot and if you power OFF the RBR while it's in router mode, it should get a clean WAN IP address from the modem. Thus by passing all the double nat issues that you seem to be having.
A bit annoying that this is not mentioned in the CAX30 User Manual. Have no idea what this would do to the LAN Setup Table for any devices which have assigned IP addresses.
Ya not sure why it's not in the manual. Should be. Need good information on features that the modem does support. Modem mode is one of them. I presume maybe NG wants users to use the CAX in gateway mode rather than modem mode. Just make things easier to make the CAX into modem mode.
I've done this myself with mine and works well.
I have static assigned IP addresses however there always on the main network (192.168.0.1) for me. I have setup a 2nd router behind the primary and always use 192.168.1.1 for those and avoid mixing devices between them. Limited devices on the 2nd router whilst testing.
My ISP is gracious though to allow me to have more than 1 WAN IP address on my CAX so while in modem mode, I can have two or more routers connected and all have different WAN IPs. đ
CrimpOn wrote:
FURRYe38 wrote:
Modem mode on the CAX would be recommended. If you set this, the modem should reboot and if you power OFF the RBR while it's in router mode, it should get a clean WAN IP address from the modem. Thus by passing all the double nat issues that you seem to be having.
A bit annoying that this is not mentioned in the CAX30 User Manual. Have no idea what this would do to the LAN Setup Table for any devices which have assigned IP addresses.
