Before OES 2018 SP1 (Update 2) patch, when you access the NSS volume with ZID value greater than the 32-bit limit using AFP, users might experience abnormal behavior while performing the file operations on that volume because of Apple Filing Protocol (AFP) limitation. Beginning with this patch, few commands are introduced in nss utility to restrict the ZID value from crossing the 32-bit limit.
For more information, see AFP Does Not Support NSS Volumes With ZID Value Greater Than the 32-bit Limit in the OES 2018 SP3: OES AFP for Linux Administration Guide.