How to Assign a dedicated NIC to use for iSCSCI Storage traffic

Hi,

Proxmox 2.x is working fine here in the 2 HP servers of my organization . Well, just wish to clear one doubt..

I have 3 NIC in each servers.. How can I assign one dedicated NIC, say eth1, to use for storage traffic.., means I wanna dedicate eth1 to connect with iSCSI storage..

Thanks in advance,