Configuring Multiple NICs on Windows 2008 Server for Network Backup

Solution 1:

You make sure your backup server can reach the file server via its IP on the separate NIC and then your backup scripts / settings must point to the IP of the new NIC.

Easy.

Solution 2:

Anand, you could try this by adding static route from your Windows Server to backup server. Let's assume your Windows server primary NIC is 192.168.10.9 and your secondary 192.168.10.10; while your backup is 192.168.1.100;

Then you could add this static route:

route add 192.168.1.100/32 192.168.10.10 metric 10

Low metric value would force this 1:1 route to be primary path for ethernet packets.