The NFS version 4 protocol (the default in Oracle Solaris) uses UTF-8 to handle file names and other strings. Therefore, so in most use cases no charset-related adjustments should be necessary. However, note that the charset option can be used if some or all clients are using a specified character set.
For example, to share the /export directory using the ISO8859-1 character set, the following command would be used:
# share -o iso8859-1 /export
To share a directory using a specific character set for some machines only, the charset=access_list option can be used:
# share -o iso-8859-1=isomachine.example.com,koi8-r=koimachine.example.com /export
All file and path names created by the clients will be converted to UTF-8 at the server.
For more information, see the share_nfs(1M) man page.