This object records whether the policy configuration for an interface row is stored permanently or is volatile (lost on reboot), following the standard SNMP StorageType convention, and it cannot be changed once the row's status is active. An administrator checks or sets this when deciding whether policy-role assignments on an interface should survive a device restart or be treated as temporary/lab configuration. For example, setting this object to nonVolatile before activating the row ensures the interface's role-based policy assignment persists across a reboot instead of reverting to defaults.