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Forum Discussion
New Cable modem and IP router scheme
I have a new Netgear cable modem, CM600 to which I added to my home setup with includes a Netgear R6250 router. Prior to obtaining the CM600 my internal network was in the range of 192.168.100.1 - .25. All was good in the world.
The cable modem now has an assigned and apparently unchangeable IP of 192.168.100.1.
I reassigned the router to 192.168.100.2 which promptly takes everything offline til I reboot the router and when it comes back up it h as an IP of 192.168.1.1 and a message on the login screen, 'TO PREVENT A CONFLICT WITH YOUR ISP PROVIDER YOUR ROUTER ADDRESS WAS CHANGED TO 192.168.1.1'
What am I overlooking? Why can't my router address be 192.168.100.2 and my leased addresses be in the range of 192.168.100.3 -192.168.100.25?
Regards,
CPerficio
9 Replies
Clan_Hunter wrote:I have a new Netgear cable modem, CM600 to which I added to my home setup with includes a Netgear R6250 router. Prior to obtaining the CM600 my internal network was in the range of 192.168.100.1 - .25. All was good in the world.
The cable modem now has an assigned and apparently unchangeable IP of 192.168.100.1.
I reassigned the router to 192.168.100.2 which promptly takes everything offline til I reboot the router and when it comes back up it h as an IP of 192.168.1.1 and a message on the login screen, 'TO PREVENT A CONFLICT WITH YOUR ISP PROVIDER YOUR ROUTER ADDRESS WAS CHANGED TO 192.168.1.1'
What am I overlooking? Why can't my router address be 192.168.100.2 and my leased addresses be in the range of 192.168.100.3 -192.168.100.25?
Regards,
CPerficio
By normal network standards as far as I know a router is always at XXX.XXX.XXX.1 you can change it but would need to make sure your dhcp server is also handing out that address as the router otherwise it will break everything.
normal network standards as far as I know a router is always at XXX.XXX.XXX.1
Well, I agree but the router can be the IP address you define. Why won't my network take the configuration that I define my network by? I don't know if the cable modem has a relationship with my router but something isn't playing nice.
> I have a new Netgear cable modem, CM600 [...]
Replacing what?
> The cable modem now has an assigned and apparently unchangeable IP of
> 192.168.100.1.That's a special address which is reserved for a DOCSIS
modem(+router). That subnet would be an unfortunate choice for your
LAN.I understand that, intrinsically, change is bad, but what's your
specific objection to using a LAN subnet other than "192.168.100.*"?Sir,
will my LAN IP addressing scheme be defined by the IP address of this DOCSIS modem and it's default address?
I have printers on my network that use Google Docs to print documents. I don't wanna go thru setting all of that up again but prefer to keep my IP addressing scheme.
Can you explain the relationship of the cable modem to the router? Even though it has an IP address my router doesn't know what that IP is, it just receives an internet connection . I don't have to define the cable modem in the router setup.
Clan_Hunter wrote:Sir,
will my LAN IP addressing scheme be defined by the IP address of this DOCSIS modem and it's default address?
I have printers on my network that use Google Docs to print documents. I don't wanna go thru setting all of that up again but prefer to keep my IP addressing scheme.
Can you explain the relationship of the cable modem to the router? Even though it has an IP address my router doesn't know what that IP is, it just receives an internet connection . I don't have to define the cable modem in the router setup.
The address the modem has is just so you can get to it from the internal network. Your better off not using the 192.168.100.X subnet internally and using something else just so it doesn't conflict with the modem itself.
