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Need some help with my home network layout.

post #1 of 3
Thread Starter 
Currently I have my network based on a cheap-o router supplied by my ISP, it's not very good on the inside but it does the job for now. I have a simple NAS with an DLNA server running and I start to see the bottleneck of the centrepiece of my network., the routers throughput and the supported network speed.

I decided it's time for an upgrade. I chose a new router, it's an RT-N16. It will be running DD-WRT and all that jazz.. I will need an ADSL modem to connect it to the internet, running in bridge mode. Up to this point it should be easy, I can get this managed by my own but there's one thing that pops up. The ADSL router that my ISP gave me is needed to run their IPTV decoder, I'd like to keep this functionality so I will have to implement that router into the network. The firmware on that router( orange's Livebox 2.0) is very basic, locked down to just a few settings.

This is how I imagine the network could work:

I have not yet decided what will do as the bridge, router 1 is the Livebox ADSL thing, router 2 is the RT-N16.
I am not entirely sure if connecting a switch to the first router would be the best idea and running everything else on the switch. I'd like not to rely on that router anymore as it heats up quite badly and proved not to be very reliable.

Now I'd like to ask a few questions about this whole set up. First of all: is it possible to have 2 routers run in the network with their own DHCP( distributing a different range of IPs) and NAT like shown above? I never tried a network configuration like that before. If yes then what configuration would each router have to be applied to? There's nothing in the way of configuring the N16 but the Livebox has a poor range of configurations. On top of that, since the 1st router only has a rj11 WAN port, will it be all right to use any of the remaining 4 ethernet ports to connect it to the bridge without much trouble? If not, could you recommend any other options?
On a side note, the Livebox router can not run as the bridge, I did my research and apparently there's no way to do that.

Thank you in advance.
post #2 of 3
I don't think you want to have two separate ranges on your network. I imagine problems will arise when trying to see devices that are in different ranges.

As for Router 1, if you can set it to run in bridge mode, or as a "switch" then you should be able to connect it to your DSL Modem via a LAN cable. At our office I am currently using a DSL Router as a switch. It connects to the modem via it's LAN ports. In my case I disabled DHCP because I didn't want it to hand out IP's.

I'm not quite sure if I understand everything you said about Router 1 and Router 2, but if possible this is what I would try.

Use your DSL Modem to handle DHCP. Then connect Router 1 and Router 2 to the DSL Modem, only disable DHCP on both of them, and have them run as basic switches. That way, you only have one IP range to work with, and every device will be visible to every other device.

If that is not possible, please let us know, I'll try come up with something else.
post #3 of 3
Well if you put your modem into bridged mode I think there can only be one Router that can have a PPPoE connection. Correct me if I am not mistaken.
As for the Double NAT if you don't want any of devices on each network talking to each other it looks like it could work. (A ACL could accomplish the same thing without more hardware).
Now the one thing is it really depends on the subnet that is allocated from the ISP to you.

Now for the explanation part of that.
My ISP modem allows only two mac addresses to be used at a given time so two different hosts / routers.
While the other thing to take note is the subnet mask that you are assigned from the ISP. (In my case this is: 255.255.255.224)
So that will allow a total of 30 hosts on that subnet.

May seem confusing and somebody else may be able to explain it better than me but thats just something to take into consideration.
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