I'm trying to join two networks. Win2k & NT4. Help me please.

[DaveDaMunkey]

Hiya,

After the I.T manager at work left, I've kinda had to pick up the reins. I can deal with most things in the office but this one has got me scracthing my head a bit, so thought I would post this and see what happens. THANK YOU in advance for even reading this essay.

Here's a basic description of wassup
We've got two networks at work.
One, with 15 PCs, NT4. For general office use, no internet.
The other is Win2k, 8 PC's and has DSL through a router.

Now, I've just got a new PC at work, and decided to stick 2 network cards in to see if I could use the DSL. It worked no problem. I can see and access both networks.

I want to be able to share the DSL to the NT4 network.
How? I tried a few things, but struck out. :-(

Bearing in mind the NT4 network automatically assigns the IP's (but they don't change from what i notice)

The 2K network has all the ip's manually specified because of their use (Predictive Phone Dialer).

Also don't really wanna screw with the 2K network that much in case I muck up it's main function.

Any ideas/guides/how-to's/specific urls

Thanks Again

Dave Da Munkey

P.S If you need more info on anything, ask.

 

[pansophic]

You can do this by simply turning on IP forwarding on your computer, and pointing all of the NT boxes to your computer as a default gateway. You'll want to statically assign your IP address in that network so that there is 0 chance that your IP will change. Just assign it outside the scope of the DHCP range, or set it up for manual assignment through the DHCP server. That is assuming that you have two separate physical networks.

If your networks are combined physically, but simply subnetted to provide a logical separation, then you are best off assigning a second IP address to your DSL router that is in the NT subnet. Then you just point the NT machines to the router as their default gateway.

But I would ask myself WHY this was done in the first place. If I had to guess, it was because the DSL bandwidth was required for the core function, and someone downloading MP3s would cause undue burden on the predictive dialing capabilities. Your DSL router is probably incapable of guaranteeing any QoS to the core functionality, so it is safer to deny that bandwidth for mere web browsing convenience.


pansophic

 

[DaveDaMunkey]

Thanks for the reply,

Your correct in the assumption about the DSL use, but the bandwith needed is 256kbps and the line is 576. I have full use of the net on my pc (not for p2p though, or mp3 dl's)
The only real use of the shared net connection will be web-browsing.

The actual internet setup of the smaller win2k and larger nt networks + router is:
The win2k net has a hub, with a crosswired cable to the NT hub, then from the nt hub, a normal net cable to the router and that's how the win2k network gets the internet.

I believe the router is controlled via a dial-in, so i'm not 100% sure i can change the settings. But it is a cisco router so i'm sure i could dl the software and see the settings, maybe add an another ip.

But without the two NIC's i've not managed to pickup the connection, even though the router is plugged into the large net hub.

I'm sure it's gotta be possible without the second NIC to join the networks, but I've never had to do it before, so i'm kinda doing my research now. (sorry to seem like a complete moron)

Dave Da Munkey

 

[pansophic]

You just need to add a secondary IP address (on the NT subnet) to the existing interface, and then point the NT machines' default gateway to the router. You'll also be able to route between the 2k and NT networks as an added benefit.

You are probably best off using the console port on the Cisco unless you are familiar enough with them that you feel confident that you won't lock yourself out through telnet.

There is no software required for programming a Cisco router, just telnet or Hyperterminal (using the console port).

I believe that the cisco command is:

ip address <nt_network_address> 255.255.255.0 secondary


pansophic