Controlling data on two NICs

Gundamtdk

One issue I am having is figuring out where the data is going when 2 NICs are installed.

For example, if I ping 192.168.0.1 I don't know if the pnig is meant for NIC 1 or NIC 2.

Is there a way to control the applications to use a proper NIC?

gojericho0

The ping should go to the NIC with the interface configure for the 192.168.0.1. Also are the two NICs on different networks or the same network?

Gundamtdk

gojericho0 wrote:

The ping should go to the NIC with the interface configure for the 192.168.0.1. Also are the two NICs on different networks or the same network?

Different network.

NIC 1: 192.168.0.100
NIC 2: 192.168.50.100
Server: 192.168.0.1

In theory ping should be able to go through, but it is not.

I have a feeling ping is going through NIC 2.

dynamik

What do you have set for your subnet masks and default gateways on each nic?

Gundamtdk

dynamik wrote:

What do you have set for your subnet masks and default gateways on each nic?

NIC1:
IP: 192.168.2.100
Sub: 255.255.255.0
Gateway: 192.168.2.1
DNS: 192.168.2.1

NIC2:
IP: 192.168.5.100
Sub: 255.255.255.0
Gateway: blank
DNS: blank

dynamik

You said NIC1's ip was 192.168.0.100 earlier. 192.168.2.x and 192.168.0x are on different subnets with a mask of 255.255.255.0. If that information is correct, neither NIC can communicate with any 192.168.0.x machines.

jwedlund

i just finished a class where we used virtual PC with 2 NIC's and i think the only way to get the two networks to talk to each other is if you use Routing and remote access on the server and take out the gateway from Nic 1

dynamik

jwedlund wrote:

i just finished a class where we used virtual PC with 2 NIC's and i think the only way to get the two networks to talk to each other is if you use Routing and remote access on the server and take out the gateway from Nic 1

Here's an example:

[192.168.0.0/24]---[Server]---[192.168.1.0/24]

If machines on the 192.168.0.0 network want to communicate with machines on the 192.168.1.0 network, you're correct. You would need to configure RRAS for that.

However, he's just trying to communicate with machines on a particular network from that machine. Since he's directly connected to that subnet, there is no need for him to use RRAS to communicate from that machine. It looks like he just needs to tweak his TCP/IP settings.

royal

Change your binding order in your NIC properties if you want one used before the other. This will modify the routing table.