Start with the
Installation Guide for Unix and Linux.
See where to find install media in the section called 'Contents of the NetBackup media kit'.
On p. 89 follow the steps under 'Installing UNIX clients locally'.
Before adding a policy for the Unix client, verify hostname lookup between server and client. Also verify that IP address can be resolved to valid hostname in both directions.
Easiest is to add hosts entries for one another on both server and client.
Create bpcd log directory under /usr/openv/netbackup/logs on new client. This will help to troubleshoot possible connectivity problems.
Create policy for client and select type as Standard.