too many nfs error messages

[ESGLinux]

Hi all,

I have a nfs server that I use to store my backups and in the client machine
I get a lot of messages like these:

Aug 31 09:03:47 SERVER kernel: nfs: server 192.168.1.111 not responding,
still trying
Aug 31 09:03:47 SERVER kernel: nfs: server 192.168.1.111 not responding,
still trying
Aug 31 09:03:48 SERVER kernel: nfs: server 192.168.1.111 not responding,
still trying
Aug 31 09:03:51 SERVER kernel: nfs: server 192.168.1.111 OK

I have mounted the export this way:

192.168.1.111:/nas/NASDisk-00002/share on /backup type nfs
(rw,noatime,noacl,rsize=8192,wsize=8192,hard,timeo=10,intr,addr=192.168.1.111)

which can be the problem? Is there any problem with de mount options?

I have tried with the soft option but with this option the server gives the
error and the backup process stops. (which is worse)

any idea?

Thank in advance

ESG