What is the maximum number of groups (GIDs) a user can belong to when using NFS with AUTH_UNIX / AUTH_SYS on RHEL?

Issue

• GIDs of users in more than 16 groups are not recognized properly on NFS.

• I can not change ownership of subdirectory of nfs filesystem, following is the error messages:

  $ chown USER:GROUP /nfs-mount-point/file
  chown: changing ownership of `/nfs-mount-point/file': Operation not permitted
  

• User getting "Permission Denied" error while creating a file on NFS share:

  # su - testuser1
  $ touch example
  touch: cannot touch `example`: Permission denied 
  

• What limits are in place for group settings on NFS ?