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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 - ....
> 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.
> Replacing what?
Do you ever answer questions, or do you only ask more?
> 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?
> [...]It "can be the IP address you define" unless that address conflicts
with some other entity on your network. Like, for example, a DOCSIS
modem.> [...] I don't know if the cable modem has a relationship with my
> router but something isn't playing nice.That "something" is you. You seem to insist on choosing a LAN IP
subnet for your router which would conflict with the standard address
for a DOCSIS modem. Perhaps your previous modem was a different type
(DSL?), or your previous router didn't care, but Netgear routers
generally do care.
> will my LAN IP addressing scheme be defined by the IP address of this
> DOCSIS modem and [its] default address?Not "defined", but certainly _limited_.
> 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.I don't understand what Google Docs has to do with anything, but
what, exactly, do you expect to need to reconfigure?> [...] Even though it has an IP address my router doesn't know what
> that IP is, it just receives an internet connection . [...]I'm not sure that you know what your router knows or doesn't know.
> [...] I don't have to define the cable modem in the router setup.
That's true, but that doesn't mean that the router will (or should)
allow you to use the "192.168.100.*" subnet.
