Managing the APR signature database

You can update or roll back the version of the APR signature database on the device.

For a successful APR signature database update or rollback, do not delete the /dpi/ folder in the root directory on the device storage media.

Do not update or roll back the APR signature database when the remaining system memory reaches any alarm threshold. Insufficient memory causes update or rollback failure and affects the function of NBAR. For information about memory alarm thresholds, see Fundamentals Configuration Guide.