Can mount successfully; but cannot wite

ISI-1# isi nfs exports list --zone dev -v
Zone: Dev
Paths: /ifs/dev/home
Description:
Clients: nesprd
Root Clients: nesprd
Read Only Clients: -
Read Write Clients: nesprd
All Dirs: No
Map Lookup UID: No
Map Retry: Yes
Map Root
Enabled: True
User: root
Primary Group: wheel
Secondary Groups: -
Map Non Root
Enabled: False
User: nobody
Primary Group: -
Secondary Groups: -
Map Failure
Enabled: False
User: nobody
Primary Group: -
Secondary Groups: -

ISI-1# ls -lead /ifs/dev/home
drwxr-xr-x + 2 root wheel 0 Nov 17 18:48 /ifs/dev/home
OWNER: user:root
GROUP: group:wheel
0: user:root allow dir_gen_read,dir_gen_write,dir_gen_execute,std_write_dac,delete_child
1: group:wheel allow dir_gen_read,dir_gen_execute
2: everyone allow dir_gen_read,dir_gen_execute

On Linux

nesprd:/root# mount  -overs=3 172.20.165.21:/ifs/dev/home   /mnt1

nesprd:/root# touch /mnt1/test
touch: cannot touch ‘/mnt1/test’: Permission denied