We are having 10GR2 RAC cluster with two nodes (Linux x64). There are one public (NIC1), one virtual (NIC1) and one private ip (NIC2) address on each node.
We have free NIC on each server also.
For some reason, we need access to RAC from another public network and question is that is it possible to set another public ip address from another network to free NIC and will it work ?
this feature is not available in 10.2.
If you upgrade to 11.2 then you have a solution:
How to Configure A Second Listener on a Separate Network in 11.2 Grid Infrastructure (Doc ID 1063571.1)
PS: Upgrade is anyway advisable, since 10.2 is near EOL.