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Differences in NFS user and group ID formats

NFSv3 handles user and group IDs as 32-bit numeric values. NFSv4 handles user and group IDs by default as strings in the form of user_name@domain_name. However, NFSv4 clients can also specify user and group IDs as numeric strings, which Data ONTAP can handle two different ways.

The Data ONTAP NFSv4 implementation expects clients to send the user and group ID as strings and handles them in accordance with the NFSv4 standards. However, if an NFSv4 client specifies a user or group ID as a numeric string, Data ONTAP can handle the numeric string two different ways:

The way Data ONTAP handles numeric strings depends on how you configure the option nfs.v4.id.allow_numerics.