Root cannot write to NFS export . root squashed?

On Isilion

ISI-1# ls -lead /ifs/dev/home
drwxr-xr-x 4 root wheel 62 Nov 19 16:04 /ifs/dev/home
OWNER: user:root
GROUP: group:wheel

Mounted on Linux Box

nesprd:/# df -h isi
Filesystem Size Used Avail Use% Mounted on
isilion:/ifs/dev/home 57G 6.6G 26G 21% /isi

nesprd:/# ls -ld /isi
drwxr-xr-x 4 root root 62 Nov 19 11:04 /isi

nesprd:/# touch /isi/test
touch: cannot touch ‘/isi/test’: Permission denied              -Why Failing ?

On Isilion

ISI-1# isi nfs export view 2 --zone Dev
ID: 2
Zone: Dev
Paths: /ifs/dev/home
Description:
Clients: -
Root Clients: nesprd
Read Only Clients: -
Read Write Clients: -
All Dirs: No
Chown Restricted: No
Commit Asynchronous: No

Map Lookup UID: No
Map Retry: Yes
Map Root
Enabled: True
User: root

Primary Group: -
Secondary Groups: -
Map Non Root
Enabled: False
User: nobody
Primary Group: -
Secondary Groups: -
Map Failure
Enabled: False
User: nobody
Primary Group: -
Secondary Groups: -
Map Full: Yes
Max File Size: 8192.00P
Name Max Size: 255
No Truncate: No
Read Only: No
Security Type: unix