We are planning to upgrade our SA 4000 box from 6.3r1.1 to 7.1r17.0
If any clients will be affected after the upgrade
(2) Any prerequistic?
C Can i direct upgrade to latest recommended version 7.1r17.0 frm 6.3r1.1?
You can upgrade directly to it and there are no prerequisites.
You should of course do a complete backup of your configuration files before undertaking the upgrade.