Two Networks on Same VM

Hello,

We have implemented two SQL 2012 servers with AlwaysOn on Non-Shared Storage functionality. I have set up 1 NIC on each server that will be routable, i.e. normal VLAN IP on vSwitch0. Now I want to setup another network that should be non-routable, that is just work for Heartbeat purpose between those 2 servers.

So how to do it.

Also, we have 13 ESXi hosts in one cluster.

Thanks.