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Orbi always loses configuration after cable modem reset
Hi - I have a Orbi RBR50 and one RBS50. My firmware version is V1.12.0.18 I have always had a problem where my Orbi base unit will lose its configuration information every time my cable modem res...
Your cable modem is hardwired with an IP address of 192.168.100.1. This is described in the manual here: http://www.downloads.netgear.com/files/GDC/CM400/CM400_UM_17July2015.pdf
With your Orbi setup to use a LAN IP of 192.168.1.1 and a subnet mask of 255.255.0.0 you have included the address space used by the modem in you LAN and created a conflict between the Orbi LAN and the cable modem's IP address. I'm not certain what's happening exactly, but it's very likely this is the source of your issue with Orbi sensing a conflict and resetting the LAN to 10.0.0.1.
You should change your Orbi LAN subnet to something different, like 172.16.X.X.
I'm curious. Why are you using 255.255.0.0? What are you doing that you need 65534 IP addresses on your LAN?
Guys, here is what might be happening. Some cable modems, even when setup as a bridge, will give out a private IP when they lose connection with the cable company's network. For example, some the COMCAST/Arris modems will give out IPs in the 192.168.100.X range. If Orbi is using the same range for its LAN, then Orbi will automatically change the LAN IP range, and hose things up.
Note that this will happen even if things are properly configured with the cable box in bridged mode and Orbi as a router.
Also note that you cannot solve this by using AP mode, because the cable modem is not a router and will assign WAN IPs when things are working properly.
The only way to prevent this would be to use a subnet on the Orbi LAN that's different from the one used by the cable modem when the modem cannot reach the cable company.
This is a case of Orbi trying to be helpful and automatically avoiding problems, but thereby causing problems.
192.168.100.xxx wouldnt be a problem though , the cable modem would need to be using 192.168.1.xxx , and if its using 192.168.1.1 its usually routing , again we wont really know till the OP posts his make and model of cable modem
it depends on the cable modem as many are also routers
but i do agree if it changes to 10.0.0.1 it should then not have issue after that
I believe 192.168.100.XXX would be a problem if the Orbi was set to use that range for the LAN. Once the cable modem came up and assigned a 192.168.100.X IP to the Orbi WAN interface, Orbi would detect a conflict and change the LAN. Another user posted on here a couple days ago with the exact problem with an Arris modem.
Read this thread for a description of the modem behavior: http://www.dslreports.com/forum/r22146513-Are-all-of-comcast-s-rep-s-ignorant-to-192-168-100-x
The behavior is apparently intended to allow access to the modem setup pages when the cable network is down.
Thanks, guys!
Here is additional information on my setup:
I have a Netgear CM400 Cable Modem - Just a modem, no router. There isn't another router or DHCP server on my LAN (unless I'm missing something), though I have a bunch 'o switches scattered around the house.My Orbi LAN setup is as follows:
- The Orbi Base Router's address is: 192.168.1.1
- The subnet mask is: 255.255.0.0
- RIP is Disabled
- The DHCP Server starting IP address is: 192.168.1.100
- The DHCP Server ending IP address is: 192.168.1.254
There are really a couple of issues here:
- Why doesn't the Orbi recognize my totally valid Username / Password if the cable modem goes down while the Orbi is powered up? I'm connected to the Orbi login page at 192.168.1.1 (I'm assuming), since I am being repeatedly prompted for the Username and Password - at this point the Orbi IP address hasn't been changed, and it replys back with the proper Username / Password when I answer my stored password recovery questions. This seems like an Orbi firmware issue independent of the IP address reassignment.
- The IP address reassignment to 10.0.0.1 doesn't seem to occur unless I hit the "Cancel" button during my multiple signin attempts, and get prompted with my recovery questions. The IP address reassignment will sometimes occur after the Orbi shows me my Username / Password, and I try logging in again.
Thanks again ...
AzJazz
what are the make and model of those switchs and are the just dumb switches or semi managed or managed
cant say why its doing what its doing but suggest you factory reset and compleyly redo the initial setup making sure first it has the latest fw installed