> I HAD a Modem that was JUST a modem. I had the WNDR4300v2 connected
> to it.
Ok. Those were the days.
> [...] I bought the C3700 which is a modem and a router in one. [...]
And that's when things got (more) complicated.
> [...] When i say 2 networks i mean each router has a differant network
> name . C3700 (RAZORBACK1) - WNDR4300v2 (RAZORBACK2). [...]
Ok. There are "networks" and there are "networks". That sort of
name is an "SSID". It identifies a group of wireless devices which can
communicate with each other. Different SSIDs can, but need not, imply
different IP subnetworks.
An IP subnetwork is a group of connected devices which share a range
of IP addresses, and which can communicate with each other easily.
("Easily", in this case, means that one member can send a message out of
its network interface, and expect another member to receive it without
any help from any fancy routers.)
> [...] My NVR system is connected to the WNDR4300v2. If i unlpug my
> computer from the C3700 and plug it up to the WNDR4300v2 i can access
> the NVR since its on the SAME network, and i can access the router
> funtions. [...]
_That_ "SAME network" is an IP subnet.
> [...] Im trying to acces the WNDR4300v2 while it and my computer
> are plugged up to the C3700. (IF thats possible) .
It should be possible.
> [...] What are the IP addresses of these devices?
Still wondering. I'd guess that a device which is connected to the
C3700 would have an IP address in the "192.168.0.*" range. The C3700
and client devices connected to it constitute the LAN subnet of the
C3700, and they share that IP address range. (It's common to refer to
the address range itself as the "subnet", because all the devices in
that subnet have addresses in that address range.)
If the WNDR4300v2 is (still) configured as a router, then its
WAN/Internet interface is part of the C3700 LAN subnet, but its LAN
(Ethernet ports and wireless stuff) will form a different subnet, with a
different address range. I'd guess "192.168.1.*" (or, perhaps,
"10.0.0.*")
Having two routers, each with its own distinct subnet (and address
range), would make it difficult for a device on one subnet to
communicate with a device on the other subnet. This could be arranged,
but it would be simpler to arrange things with only one router (hence,
one subnet). There are two ways to do that. Either one of those ways
should solve all your two-router problems, and let everyone talk to
everyone else easily.
One way would be to disable the router functions of the C3700, making
it work like your old (still unspecified) modem-only modem. In the
C3700 User Manual, look for "Cable Your Modem Router to a Router or
Gateway". This also disables the wireless-network stuff in the C3700,
leaving your WNDR4300v2 as your only wireless access point. If your
WNDR4300v2 is some distance from your C3700, and you'd like the wider
wireless-network coverage which you could get by using both devices for
wireless access, then the other way might be preferable.
That other way would be to configure the WNDR4300v2 as a wireless
access point (only). In that mode, all the fancy router functions of
the WNDR4300v2 are disabled, and it, and devices connected to it,
become part of the C3700 LAN, along with devices which are connected
directly to the C3700. The WNDR4300v2-as-WAP acts like a simple network
switch with wireless capability -- not very clever, but still useful.
See:
> [...] "Use the Router as a Wireless Access Point" in the WNDR4300v2
> User Manual, [...]
As usual, many things are possible. If all your wireless client
devices are close to the C3700, then they could all connect to the
C3700, and the only purpose which the WNDR4300v2-as-WAP would serve
would be as a network switch, so you could use the C3700 as a
modem+router, and replace the WNDR4300v2 with a simple/cheap network
switch. (If the C3700 and WNDR4300v2 are close together, then their
radios may be more likely to interfere with each other than they would
be to offer any real benefit. In such a case, disabling one or the
other might make sense.) Your geography, cable-run convenience, and
who-knows-which-other-factors could all affect your choices.
> [...] but I learn quick.
We'll see. Let us know if questions or mysteries remain.
