help:Lan-free backup question

[ming li]

Hi all,somebody told me that for TSM lan-free backup client(store
agent?) must need two separate fc adapters to transfer  backup data
and application data,is this ture?From store agent manual I couldn't
find any subject about this.But for Veritas Netbackup a media server
only need 1 fc adapter to do this.Who can help me?Thanks!