Root on one server should not necessarily have root access on another box, therefore, by default the root userid is mapped to userid nobody in NFS.
nobody UID -2 GID -2 (or 65534 65534 for unixes that don't allow negative numbers)
If this is not the desired behaviour, set up /etc/exports as follows:
This allows server host1 normal root behaviour on /home/work . (Instead of a hostname, a netgroup can be specified).
To disable suid on NFS mounted filesystems:
host1:/usr/local/bin /usr/local/bin nfs ro,nosuid 0 0
the following:/home/work -anon=100 means, instead of using nobody, use UID 100.