you have to have the MSQL server (this is the one with the database) configured to have a FC card the is then attached to a Tape drive, you will need a Netbackup SSO license.
NetBackup SAN Client and Fibre Transport Troubleshooting Guide (Revision B) (updated July 15, 2008)
http://seer.entsupport.symantec.com/docs/288437.htm
DOCUMENTATION: SAN Client Deployment - Best Practices and Performance Metrics
http://seer.entsupport.symantec.com/docs/293110.htm
If these are virtual server OS's then you could use the LAN-free VCB proxy method.
For configuring LAN Free backups , you will have to make the windows clients as SAN Clients and you will have to configure Fiber Transport Media Servers which connect to the SAN Fabric , these are different from the normal Media Servers