How to add the another subnet mask in existing cluster ?

Hi All,

We faced a situation in our environment. We have existing SQL cluster installation between (NODE1 & NODE2) this cluster using the 10.10.xx.xx\29 subnet mask. Later add the NODE3 with different subnet mask (198.XX.xx.xx\26) to existing cluster and installed the stand alone installation and configure the Alway on between the sql cluster installtion and stand alone installation and created the one AO group.

Now the problem is the client wants to create the another AO group and he provided the IP's from different subnet mask because we don't have new ip's from existing subnet masks.

Can we add the another subnet mask to the existing cluster ?

Thanks In Advance for your time and efforts..!

rup