Two Routers, 2 ADSL Connections, ideal network setup - Best Practice advice

Dear Experts,

I have 2 ADSL connections, and I am looking for advice on the best practice to setup a single network. I am about to change one of the connection providers, and then add another server to the network. Therefore this seems like a good time to ask!

I do not have enough money to buy expensive equipment, so I need to make do with what I have got / can acquire very cheaply.

The map below may help explain what I have and what I am trying to achieve.

 Network Map
The Green represents new equipment.
The Red represents existing connections
The Blue is currently missing connections, I would like to add.

Both Routers have ADSL connections with 8 IP Addresses.

I would like to make use of both servers on port 80 on different IP addresses. (Same connection).

I would like to be able to access Network-Drives from both servers on all machines.

At least one computer on each router is wireless, therefore additional NIC's is not possible.

Additional NIC's on servers is possible.

Machines from the right should be able to print to network (Cat5) printers on the left.

I am happy for the "local" router (compared to each machine) to provide internet access for that machine. But I would like the option to use a different connection if one goes down (*This does not need to be automatic, I am happy to change settings if required).

Any advice greatly appreciated!

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Ahhhh, no, I think that was my mistake. Configure both routers to have the local side on the same subnet, plug both routers into the same switch. Then turn DHCP off on both routers and set static IPs on all hosts, balancing the load across the ISPs as bandwidth is allocated.  If you let DHCP on then all devices that request an address will be pointed to the same router, you could leave it enabled and do some hosts DHCP and some set static to the other router.... Since everyone is on the same subnet you will be able to access printers, file servers, etc. with no issue. In the case of one ISP going down you would then have to reconfigure the default gateway for the hosts affected. Having the servers available with multiple IP address wouldn't be an issue, the server is listening on 80 and doesn't care where the traffic is coming from, you would just need to update your DNS records with your provider to show the secondary IPs.
Unfortunately those routers will not allow you to setup a VPN tunnel to create a single network. Your definition of expensive may differ from others, so I would suggest the following. Purchase a pair of Cisco 800 series routers and configure a site-to-site VPN with split-tunneling so the two networks can communicate securely, while browsing the internet with their own bandwidth. Depending on the model you can connect directly to the ISP, rather than using their modem, otherwise you would want to bridge the modem to have your router connected directly to the internet. Accessing printers, network drives, etc would be a non-issue since the networks would appear to be local to each other, just on different subnets. Accessing the servers over port 80 (I assume that you are running a website?) would just require some port forwarding. This setup can be accomplished with other vendors equipment as well.
G_HAuthor Commented:

Thanks, I think I may have not made something clear...

The routers are in the same building, just 20 feet (6 metres) apart. I would not want to strangle the connections by passing a video file out one ADSL connection, and back in the other.

I was hoping for a solution which had a Cat5 cable going between the existing networks...

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G_HAuthor Commented:

I think I have got most of this..!

OK, so this is what I am thinking...

Everything will be on

One router (DGN2000) will not DHCP,

The other router will DHCP for mobile phones, visitors and occasional devices.

I guess I will have to change the address of the DGN2000 so that it does not clash (they are both currently on (Maybe change to

The RHS devices (connected to DGN2000) will be set to use the gateway

The LHS devices will use the gateway.

Is the above correct?

For the server stuff, the question is "how" does the router know "which" of the servers to send port 80 traffic to? The router will have 5 use-able (external) IP addresses, and I can set the appropriate A Records to point to each External IP.

But how does the router know / what do I need to setup?

G_HAuthor Commented:
OK, I have changed the settings in the current routers to match roughly my post above. This now seems to work.

I still need help with the two servers, and their IP Addresses however.

I do not want them to be on different routers, as the up-speed of the WRN2000 is so much higher.

So I need to know how to use 2 different IP addresses for the servers, so that port 80 can be mapped to both of them. > ?

Any help greatly appriciated.
Sorry, was away from internet access the whole day. So what you want is to have the connections to both servers from the one router? If you have multiple public addresses then you just need to match up your records and forward the ports accordingly. ie. -> inside_server1 -> inside_server2 . Your router will have to do the listening on the public IP addresses that you have assigned and you will just update your A records to your choosing.
G_HAuthor Commented:
No problem, have been too busy myself, and thank you for your help to date.

As of now, I do not have the WRN2000. I do have the DGN2000 and the DG834 (which is the one to be replaced).

I cannot see anywhere to enter the settings for mapping external IP's to internal ones. I am also not sure this is mentioned in the docs I have seen for the WRN2000 (This is being supplied by my new ISP).

If this is not possible (with these routers), just let me know, as I was only hoping to make the transfer of "stuff" from server1 to server2 a little easier.

Not familiar with Netgear equipment. If the ISP sold you the IPs AND the Netgear I would think that they would account for a customer with multiple public IPs. I would recommend talking to Netgear or maybe posting a new thread so someone with more xp in SMB/Comsumer routers can see it. If I had to guess I would say that it wouldn't support it since SMBs rarely need more than one public IP.
G_HAuthor Commented:
Thanks for your help, you have got me up-and-running with the two connections and two routers!

I can access everything from everywhere now, great!
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