[Skunkworks] Mapping adrive on linux(red hat)

Skunks, how do i permanently map a network drive on my linux box, i have noticed that each time the box restart the mapped drive never reconnects. The cmd i use is as follows mount -t cifs //192.168.1.251/download /down The drive being mapped is a NAS drive and /down is a folder on the linux machine. Please advice Secondly any one selling NAS drives with backup utility for up to at least 20 machines on the network.