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R7000 can't access admin page anymore and DHCP IP Range changed on its own
I noticed recently that my internal IP range changed from 192.168.1.* to 10.0.1.* on its own. I believe I had the router configured to auto update to new firmware, so I'm guessing it updated itself and changed its settings. When I try to access the admin page nothing loads. I've tried 10.0.1.1 and 192.168.1.1 and nothing comes up. I'm wondering if anyone else has had this issue recently. I will eventually hard reset to factory settings and set it back up that way, but I'm hoping to exhaust my options before going down that route. Any ideas?
I was able to determine the cause. It tipped me off when you said the IP range changes when there's a second device doing DHCP. I noticed there were new computers on my network when I looked at network file sharing. I use the Netgear Powerline device to get wired connections to my living room. What I believe happened is that my neighboring apartment unit recently set up internet and is also using a powerline device. I noticed my DNS suffix was changing to a different address which is the ISPs instead of my router. I put 2 and 2 together and realized my network was overlapping with his via the powerline. I never set up an encryption key on the powerline so it was still using default settings and connecting to my neighbors powerline. When I added the encryption key, the problem went away and my network returned to normal. Next time I should follow the instructions when setting up new network hardware. Oops
11 Replies
That's a huge concern that the IP range changed on its own. A firmware update should not change the IP address range.
My guess is the router is shot and you need a replacement.
gpetroski wrote:I noticed recently that my internal IP range changed from 192.168.1.* to 10.0.1.* on its own. I believe I had the router configured to auto update to new firmware, so I'm guessing it updated itself and changed its settings. When I try to access the admin page nothing loads. I've tried 10.0.1.1 and 192.168.1.1 and nothing comes up. I'm wondering if anyone else has had this issue recently. I will eventually hard reset to factory settings and set it back up that way, but I'm hoping to exhaust my options before going down that route. Any ideas?
NG routers will switch to a 10.x network when they see the exact same network on the same wire. (elliminates duplicate IP subnet issue) Sounds like you have DHCP running on something else, lilke another router, or your ISP provided router modem combo in the 192,168.1.x subnet.
Show us your network layout. You only have one modem, one router or anything else? Hard to believe what happened to your R7000.
What does IPCONFIG /ALL show from a connected Windows PC in a COMMAND prompt?
Usually it would rotate through specific internal LAN IP Addresses IF it found when turning on other Private IP xxx.xxx.xxx.1 is active on the LAN it is attached too, namely your modem? However the ISP would need to do that change.
Did you try 10.0.0.1 or 192.168.0.1?
The other possibility is you have set a device on your LAN to have 192.168.1.1 as its IP Address (printer for instance). Of course you couldn't connect that device if you did, but once the router updated and rebooted it would see that and switch. So check all devices and make sure it isn't trying to use that address.
How a gateway address can be assigned to a device? DHCP is not that dumb!
All you need do is set it to be that. Printer's can be easily, and can almost and network card. Nothing stops you from setting the router to a different IP Address within the private network too as the gateway. Go to ADVANCED --> SETUP --> WAN SETTINGS and you can change the DEFAULT of 192.168.1.1. Useful when more than 1 router is in a network. Easy to mess up and have a collision with other devices.
I was able to determine the cause. It tipped me off when you said the IP range changes when there's a second device doing DHCP. I noticed there were new computers on my network when I looked at network file sharing. I use the Netgear Powerline device to get wired connections to my living room. What I believe happened is that my neighboring apartment unit recently set up internet and is also using a powerline device. I noticed my DNS suffix was changing to a different address which is the ISPs instead of my router. I put 2 and 2 together and realized my network was overlapping with his via the powerline. I never set up an encryption key on the powerline so it was still using default settings and connecting to my neighbors powerline. When I added the encryption key, the problem went away and my network returned to normal. Next time I should follow the instructions when setting up new network hardware. Oops
