Path: utzoo!utgpu!ugw.utcs.utoronto.ca!CUNYVM!IBMTCP-L Date: Fri, 9 Feb 90 15:31:58 EST Reply-To: IBM TCP/IP For VM List Sender: IBM TCP/IP For VM List From: Arthur Yeh Subject: SNA over IP? To: UofToronto LAN redistribution Message-ID: <90Feb9.171037est.58767@ugw.utcs.utoronto.ca> Newsgroups: list.ibmtcp-l Distribution: ut Approved: devnull@gpu.utcs.toronto.edu My use of the term 'tunnel' gateway refers to the function of passing data composed on one protocol stack and transporting it, or them, across another. This would allow us to, for instance, encapsulate all SNA traffic on a LAN within IP packets, transport it across our IP backbone, and then unencapsulate it for use by a T-R 3174 or T-R 37X5. Reverse traffic follows the same logic. I wonder if such a thing exists and how feasible it might be to develop the software. In response to suggestions to use telnet or tn3270, my concern is for the functionality provided by native 3270 services(e.g. local copy printing and multiple logical terminal support), the effort in maintaining a, therefore, greatly enlarged IP network, and the learning curve imposed on staff and administrators that, must now, learn something about TCP/IP to get their jobs done. Of course, this is still an alternative, albeit a somewhat distasteful one. Arthur C. Yeh Systems Programmer University of South Carolina 803/777-4409 (C0298@UNIVSCVM)