Basic Question on IP address assignment

Hi all,

I'm hoping I can get help with assigning IP addresses for a network setup at work. Basically, we have a PC with 3 NICs. One connects to our clients corporate network, while the other two are for us the service provider to use. The PC runs an application that communicates with a component on our network over a VPN connection. For redundancy, two basic routers have been installed so that should the VPN via ISP1 fail, the backup router can route traffic.

Is it technically correct to assign IP addresses to the two NICs as I have done it in the diagram below? i.e. can I have two NICs on the same network (192.168.1.0/24)?

NIC1: 192.168.1.1/24
NIC2: 192.168.1.3/24

img245.imageshack.us/img245/9389/vpnsetup.jpg
OR is it technically correct to have both NICs on diff networks like so:
NIC1: 192.168.1.1/24
NIC2: 192.168.0.1/24
img59.imageshack.us/img59/1765/vpnsetup2.jpg


The initial idea was to connect both router to a switch, but my client cant be bothered to get a switch. Static routes are set on the box so that the app can failover if required.

Any contributions appreciated

Hi skylimit

I can't find any problems with your arrangement. One point to make sure of.
If there are any applications that need to use either of the network cards, you might have to ensure that manually, so use specific routes. You might even want to setup some static routes on the pc based on source IP address, if and only if you need it.

Otherwise don't see any problem with the arrangement.

Cheers

Hi. Actually i too dont see any issue with the two configurations unless you are using dhcp. The 2 will work ok,u just need to correctly configure the default gateway and ip routes.