Turned out to be a wrong duplex setting on the switch in that remote office. Apparently VM was more susceptible to it than OS/390, but we expect that the OS/390 applications were running very slowly even though they weren't dropping. Terry
________________________________ From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Matthew Donald Sent: Sunday, September 20, 2009 9:49 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Dropping VM 3270 Session I'm guessing that there may be TCP/IP configuration differences between z/OS and z/VM. Do they use separate OSA's? Perhaps it could be a MTU issue - the classic 1500 vs 1492? On Sun, Sep 20, 2009 at 8:00 PM, Moore, Terry A. <t.mo...@timken.com> wrote: I have a client in a small office in the UK that can not maintain a TN3270 session (Hummingbird Host Explorer) back to our VM host here in Ohio. It connect briefly and displays the logo screen then drop before he can enter a userid/password. If he goes to another of our UK offices, his PC connects perfectly. I was thinking "network problem", yet he can connect to our OS/390 system fine and can even make the VTAM jump from there to the VM system for a CMS session with no problem. Any ideas on what we should be looking for? Terry A. Moore IT Project Manager ________________________________ This message and any attachments are intended for the individual or entity named above. If you are not the intended recipient, please do not forward, copy, print, use or disclose this communication to others; also please notify the sender by replying to this message, and then delete it from your system. The Timken Company / The Timken Corporation ----------------------------------------- This message and any attachments are intended for the individual or entity named above. If you are not the intended recipient, please do not forward, copy, print, use or disclose this communication to others; also please notify the sender by replying to this message, and then delete it from your system. The Timken Company / The Timken Corporation
