Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!uakari.primate.wisc.edu!unmvax!ncar!gatech!emcard!wa4mei!nanovx!msa3b!kevin From: kevin@msa3b.UUCP (Kevin P. Kleinfelter) Newsgroups: comp.protocols.ibm Subject: Re: TCP/IP over SNA Message-ID: <1133@msa3b.UUCP> Date: 25 Sep 89 23:47:35 GMT References: <8909250654.AA16455@jade.berkeley.edu> Organization: Management Science America, Inc., Atlanta, GA Lines: 43 robert@peregrine.UUCP (Robert Young) writes: >In article <1079@ks.UUCP> drake@ibmarc.UUCP (Sam Drake) writes: >>This isn't a commercial, but ... >> >>IBM's VM and MVS TCP/IP products can transport TCP/IP over SNA networks, >>and there's a PRPQ available from IBM to allow the RT to do the same. >> >>Sam Drake / IBM Almaden Research Center [Stuff about connections suggested by IBM omitted.] >So far it looks like the IBM people we deal with are not completely sure >about any clear solutions. >Any clues would really be appreciated. O.K. I have spent quit a bit of time hashing this out with many different people, and this is how it looks to me: 1. You CAN send TCP/IP over SNA -- in SOME cases. To attach SNA to TCP/IP (using AVAILABLE hardware/software) you MUST have a host (i.e. a 370) and a host adapter (I think it is an 8232). To route TCP/IP over SNA would look as follows: workstation---8232--370====(SNA NETW)===370--8232---workstation There are plans involving RT's and SDLC links, but they do not seem (to me) to really be routing TCP/IP over an SNA network. 2. The "normal" IBM communications hardware (3705, 3174, etc) do not support TCP/IP connections. You have to attach to a host at each end of your link. Future versions of the 3705 and 3174 will probably support TCP/IP, according to an IBM employee I met at an IBM class, but that is "unofficial." 3. We don't like the above. We are looking at multiplexing TCP/IP and SNA over our existing lines, or using an X.25 service, or using other alternatives to running TCP/IP over SNA. If you find a better solution, PLEASE POST! (Other people seem to be interested!) -- Kevin Kleinfelter @ Management Science America, Inc (404) 239-2347 gatech!nanovx!msa3b!kevin