Tom's Hardware > Forum > General Networking > Network General Discussions > router ip address changed due to modem
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Jedi940   02-08-2008 at 03:23:07 PM

I just changed my highspeed internet provioder over to verizon. however, when i hooked up the modem they sent me it caused my router to change their ip address scheme. the standard I had been using was 192.168.1.x and it had been working fine. However when I hooked up the new modem, it changed it to 10.0.0.x and I can't figure out why. If I go into the router setup and try to put it back, the internet stops working. Any thoughts on why this happened. I don't want to have to go back and redo my firewall permissions on all of my computers to the new ip addresses.

I have two routers and a switch in my network. and the ipaddress changed on BOTH routers. The internet is plugged into a Netgear wireless rangemax router model WPN824. That is then plugged into a netgear switch which runs all of the outlets in the basement. Then from one of the outlets in the basement I have another older netgear wireless router plugged in. I believe the DHCP server is disabled on the router in the basement.

------------------------------ GA-965P-DS3 (rev. 3.3) | e6600 @ 3.4 Ghz 425x8 @ 1.42v | Thermalright Ultra 120 Extreme | 2GB Corsair XMS2 4-4-4-12 @ 850 Mhz | 2x160GB WD Raid 0 | 2x250GB Segate Raid 1 | evga 8800GTS 320mb 580/1840 | OCZ 700W PSU | 3dMark06 10346 @ 1280 X 1024
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rgeist554   02-08-2008 at 08:50:36 PM
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Once you change the IP addressing scheme on the routers, you'll have to either manually configure the IP's on all the PC's to match the new scheme, or a an ipconfig /release & renew on them to get the addresses.

As for why it changed to a 10.0.0.1 scheme, I'm not sure. I'm guessing it could be the new modem having a build in DHCP server and assigning whatever it wanted.

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Jedi940   02-08-2008 at 09:06:14 PM
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Yea, I know I have to renew the ip address on the computer after I change them but it still wouldn't work right. Perhaps the modem does have a dhcp server. . . just a bit irritating since I wasn't expecting it.

------------------------------ GA-965P-DS3 (rev. 3.3) | e6600 @ 3.4 Ghz 425x8 @ 1.42v | Thermalright Ultra 120 Extreme | 2GB Corsair XMS2 4-4-4-12 @ 850 Mhz | 2x160GB WD Raid 0 | 2x250GB Segate Raid 1 | evga 8800GTS 320mb 580/1840 | OCZ 700W PSU | 3dMark06 10346 @ 1280 X 1024
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