Of course, if we had more information, we could provide more useful answers. For example, what kind of tape library? What kind of server is it connected to, and by what means? And what kind of backup software?
Also, what exactly is it that you want to configure? If the backup software can address it and load tapes, then what else is it that you need?
Assuming it is a SCSI connected library on a Linux server, mt and mtx (http://sourceforge.net/projects/mtx
) can do pretty much everything that is normally needed from the command line. These are the tools that open source backup software uses (Amanda and Bacula).
If you are wanting to do things like firmware upgrades, then that may require either a utility from the vendor to do it "in band", i.e. over the SCSI connection, or it may have some mechanism through a web interface when it has a network connection.
There is most probably a front panel that can be used for some configuration. It could be that you can configure the IP address from the front panel.
But all of that depends on your providing us with further information.