Mount nfs unit afther connect

[ferdinandpc]

Hi, I need your help.
I have some pcs connected throw vpn and need automount nfs units when the system up. I added the units to fstab file, but not mount because the vpn is not connect, always need login remotely to remount units.

I try to add the option --up "mount -a " but after some seconds take error and not connect. Also I tried to change --up to --route-up with the same result.
How can I mount unit after connect to vpn network?

Regards