In Pi.3b with Raspbian (Jessie) I want to mount a USB that is attached to a HomeHub 3000 Router

When i enter the following.
mount -t cifs //192.168.2.1/mynetwork/PNY32GBA

This is the error Msg.
mount: can't find //192.168.2.1/mynetwork/PNY32GBA in /etc/fstab

I tried to create /etc/fstab But with no success.

127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
127.0.1.1 raspberrypi-WW

I added the following and saved the file.
192.168.2.1 //mynetwork/PNY32GBA

No error Msg. but cannot see the file in the Directory Listing.

Do not know what it is, that I am missing / doing wrong.

Thanks for your time.