François, Sounds like TRACERTE might show you where the slowness might be. I would compare the "path" between the pc->linux and mainframe->linux and look for the differences. My guess is there is a firewall/router in the path that is misbehaving... but then there are so many wonderful things that can happen on a network.
I think the packet trace is a good idea as well. Just another thought.. are you transmitting the same file in each of the tests? (just making sure) Rob Schramm Sirius Computer Solutions ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
