restart portmapper service.
This can be achieved by following command:
#/etc/init.d/portmap restart
Stopping portmap: [FAILED]
Starting portmap: [ OK ]
# rpcinfo -p
program vers proto port
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper
Also ask customer to check if nfs services are running on the NFS server. you can provide the following commands
# chkconfig --list | grep -i nfs
nfs 0:off 1:off 2:off 3:off 4:off 5:off 6:off --> in this case nfs was not running
nfslock 0:off 1:off 2:off 3:on 4:on 5:on 6:off
if not running please change the chkconfig and the restart nfs services
# chkconfig --levels 345 nfs on
# chkconfig --list | grep -i nfs
nfs 0:off 1:off 2:off 3:on 4:on 5:on 6:off
nfslock 0:off 1:off 2:off 3:on 4:on 5:on 6:off
# service nfs start
Starting NFS services: [ OK ]
Starting NFS quotas: [ OK ]
Starting NFS daemon: [ OK ]
Starting NFS mountd: [ OK ]
Once nfs services are running on the NFS server check them on the IQ side with the same commands
Finally mount the NFS