Anyone see this "Do you want to use RSH instead? [y,n] (n) " before

Hi All,

When I installed new media server 7.5.0.6 on linux redhat  2.6.32-431.23.3.el6.x86_64, it asked a question: "

sfmsap1blpc  sfmsap1clpc nodes are not ssh equivalent
Passwordless SSH is not configured between cluster nodes
It is recommended to use SSH for secure communication
Do you want to use RSH instead? [y,n] (n) n

after I said Yes , I think itnstallation failed because I am not able to see /usr/openv/netbackup/bp.conf

Anyone see that message before and how can I fix that issue? Thank you.

Tom