Norbert,
        Our current infrastructure is two TSM servers running on Windows NT
4.0. Each server has three TR NICs and we're getting around 200GB through
per night. We are now re-structuring the TSM environment going to two TSM
servers running on AIX. We will have three dedicated Ethernet backup VLANS.
One each for SQL/ORACLE, Exchange and NetWare/NT. The clients will be
running 100Mb/sec switched ethernet and the TSM servers will be running
gig-E. We are looking at having all of the TDP traffic sent to one TSM
server and all the BA traffic to the other. In that case, one server would
have four NICs and the other two. We would also be using CISCO link
aggregation to have 2Gb/sec for each VLAN at the TSM server side.

Seth Forgosh