I am trying to add second network for back-end traffic. My setup is a 3 hosts running with gluster storage in 3+1 replicat. Now i am trying to add a second network with the UI and when i try to had a the host interface to the new network it is always failing and i lost communication with this host.  I am not sure what are the step to add a second network with already 3 Host in the cluster.

My setup us 4.2.

Any inputs would be appreciated.

Thanks