NFS from Oracle Linux 8 to Solaris 10 connection problem

Hi

# mount -o vers=3 <NFS-SERVER-IP>:/data /mnt

nfs mount: <NFS-SERVER-IP>: : RPC: Timed out

nfs mount: retrying: /mnt

the mount is made by Solaris 10

and the server is Linux

however when I'm mounting without -o vers=3 the mount doesn't show errors:

# mount <NFS-SERVER-IP>:/data /mnt

# df -h /mnt

Filesystem size used avail capacity Mounted on

<NFS-SERVER-IP>:/data 9.9G 6.5G 3.4G 66% /mnt

but when I'm trying to synchronize the mount I get permission denied:

bdk2/bin/bkr_1030_create_file_demogr.sqt -> /app/prd1/bin/bkr_1030_create_file_demogr.sqt

rsync: chown "/mnt/dev1/bdk2/bin/bkr_1030_create_send_file.sh" failed: Permission denied (13)