Up to three locations can be set for each file type, using the primary-url, secondary-url, and tertiary-url fields. The auto-provisioning process attempts to download all files using the primary-url information for each file. If this attempt is unsuccessful, the process reattempts using the secondary-url information for each file. If this attempt is not successful, the process reattempts, using the tertiary-url information.
A ZTP operation is considered successful when all files named in the provisioning file are downloaded. If all file locations are attempted and all named files are not successfully downloaded, the auto-provisioning process fails and ZTP reattempts the provisioning process using the next valid interface.