How can I forward/communicate between two NIC with two subnets on same Server Windows.

Question

I have a Windows Server.
I have two NIC

1. NIC1 Ethernet which is connected to office Network and also to internet. IP address 172.16.10.5
2. NIC2 one LOOPBack interface which i created using hdwwiz utility. 10.1.1.2

my Loopback interface is connected/used by GNS3 Server and GNS3 is configured with Routers and Routing Protocol is configured.

I have ping from Loopback interface IP 10.1.1.2 to the Routes in the GNS3 and from routers to the IP 10.1.1.2

But i cannot ping the IP 172.16.10.5 from the Routers
also from other Computers in network 172.16.10.0 to the Routers.

I want other Servers/computers in network 172.16.10.0 to ping/reach the Routers

To do this, i think i need to forward the traffic from NIC1 to NIC2 and vicecersa
So when a computer in network 172.16.10.0 pings the Routers or NIC2. Then the should reach the NIC1 and then the traffic frm NIC1 should be forwarded to NIC2

let me know how can we archive this ?

Thanks
Prem

Answer 1

Simplest solution is to use layer 3 hardware for this purpose. If you must use windows then one option is to stand up a dedicated virtual machine as a router.
https://www.dell.com/support/kbdoc/en-us/000118763/configuring-windows-server-2012-r2-as-a-router

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Answer 2

Hello @BornnConfused

in addition some useful information:

https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/dn614140(v=ws.11)

Regards,

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