How to configure NetBackup SSO with NDMP?

The problem: Configure the filer to support NetBackup Shared Storage Option (SSO)

Explanation:
Data ONTAP 7.1.1 and 7.2.1 (not in 7.2) add the support for SCSI Reserve/Release, replacing the old Persistent Reservations code that previously existed in ONTAP, and is now supported for NetBackup SSO (starting with NetBackup 6.0).

To enable:

options tape.reservations scsi