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Forum Discussion
RAX120v2 doesn't keep configured LAN address on Router/Cable Modem reboot
I have an RAX120v2 connected to cable modem.
It gets the Internet Address from the modem.
I have the LAN address configured to the 192.168 range.
I do this because I have a number of IOT devices I want to access via browser while at the house and need their IP addresses (i.e. it could be a pain if they kept changing via DHCP).
Power goes out to the house.
Backup House generator kicks in about 20 seconds later.
Router comes back to life.
Cable modem comes back to life (usually slower).
When the router comes back, it's now on the 10.0.0.x LAN network rather then the 192 network I originally configured it for.
Why is it doing this? If I set the LAN to an address, shouldn't it keep that through a power cycle?
5 Replies
What Firmware version is currently loaded?
What is the Mfr and model# of the Internet Service Providers modem/ONT the NG router is connected too?
Be sure your using a good quality LAN cable between the modem and router. CAT6 is recommended.Please post the first 3 characters of the routers serial number seen on the sticker in back.
It sounds like your ISP modem may have a router built in and uses default 192.168.1.1 which if so, this would be seen by the RAX and it would auto change to a 10.something address to avoid the conflict which would be expected. If your ISP Modem already has a built in router and wifi. This would be a double NAT (two router) condition which isn't recommended. This would be a double NAT 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 NG 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 NG router gets from the modem. https://kb.netgear.com/25891/DMZ-on-NETGEAR-routers
https://kb.netgear.com/24086/How-do-I-set-up-a-default-DMZ-server-on-my-Nighthawk-router
3. Or disable all wifi radios on the modem and connect the NG router to the modem, LAN to LAN configure AP mode on the NG router.
https://kb.netgear.com/20927/How-do-I-change-my-NETGEAR-router-to-AP-modeTry option #2 first and set the RAX router IP address to 192.168.0.1.
Recommend setting the default DHCP IP address pool range to the following after applying and a factory reset: 192.168.#.100 to 192.168.#.200.
Thanks for your quick reply.
Yes, I'm double NAT'd but there are no devices on one private network that try to talk to the other. I have the Netgear router at 192.x.x.50 with the DHCP range from 2 to 49 and IOT devices set above 200. But I like your idea better of setting the DHCP range from 100 to 200 as I tend to get more devices on the network each year and when the kids come, etc. Anyway, it should not have thought there was an address conflict (?).
Before I saw your post, I tried setting the "check box" for PPPOE-Passthrough. I'm in a storm and the power went out three more times after that - and that seemed to work through these three additional power-cycles of the modem and router but I'm not sure why. Maybe that configuration did something similar to your suggestion on bridge mode.
FYI - The cable modem has no wifi but probably has a router inside. There is no interface for me to access to change anything on the cable modem. I can call them Monday to see if there is something they can change on the modem side. But if this last change fixed it then I probably don't need to???
Just to clarify. Outside world goes to cable modem. Cable modem to Netgear router. Everything is behind the Netgear Router and nothing between the modem and netgear router.
I'll also get a UPS for the cable modem. Restarting the Netgear router has never been a problem by itself. I had one before but the battery needs to be replaced.
===================================
RAX120v2
Firmware v1.2.8.40
Netgear router in "router" mode.
Serial # starts with 6JY
Let us know if the suggestions and ideas help.
Also let us know if you see the router mysteriously reboot. V2s have a reboot problem that NG has provided a beta patch FW for.
