You can use either of the following methods for to configure root user access to an NFS file system that is secured with Kerberos.
Configure the nfs client.
# kclient -a adminuser -k kdc-list -R realm
See the kclient (1M) man page for more information.
Configure the Kerberos client, following procedures in Chapter 4, Configuring the Kerberos Service, in Managing Kerberos and Other Authentication Services in Oracle Solaris 11.3 .