Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!ucsd!pacbell.com!pacbell!att!dptg!ulysses!atti07!althea!eddjp From: eddjp@althea.UUCP (Dewey Paciaffi) Newsgroups: comp.unix.aix Subject: Re: TCP/IP Over SNA Message-ID: <2337@althea.UUCP> Date: 17 Aug 90 13:33:11 GMT References: <081690.091707.heise1@ibm.com> Reply-To: eddjp@althea.UUCP (Dewey Paciaffi) Organization: Shakedown St. Public Access Unix - New Brunswick, NJ Lines: 89 In article <081690.091707.heise1@ibm.com> RAH@IBM.COM ("Russell A. Heise") writes: - - eddjp@althea.UUCP (Dewey Paciaffi) writes: - - > In article <2812@awdprime.UUCP> linas@linas.austin.ibm.com writes: - > - - > -Let me try to answer this one... - > -If you have a SNA network, there is no way in the world that - > -you can hook up a Sun to it. If you did, every airline reservation - > -system in New Jersey would probably burp. > > - > Don't tell this to my SUNs doing 3274 emulation... - Here, here... - > - > -If you have Ethernet, well, just hook the /6000 to it. It'll work. - > -Use sockets. They'll work. IBM TCP/IP is NOT implemented on top - > -of SNA. If you have to use SNA, call your IBM Mainframe service rep. - > -The /6000 supports SNA, but you'll probably have to buy special - > -hardware to hook up to your s/370 or 3090. - > - > This seems to conflict with what I've heard elsewhere. I've been told that - > the RS/6000 doesn't support SNA, but that SNA does support TCP/IP, with - > the proper Hardware/Software/Mainframe configuration. If this actually - > is the case, then the RS/6000 TCP/IP should be just as easily transported - > across the SNA as the TCP/IP from a SUN or a Xenix/386, for that matter. - - My turn. AIX V3 on the RISC System/6000 provides support for TCP/IP - over Token-Ring networks, Ethernet networks, and Serial lines (RS-232D). - This support comes in the base OS offering. In addition, you can - purchase and install a separate product, AIX SNA Services/6000, which - provides a programming level interface to an SNA network. It does not - provide a user-interface or any form of emulation, but it does allow you - to build your own interface on top. - - TCP/IP and SNA are apples and oranges, with some exceptions. The - biggest exception arises from the fact that an SNA network can include - a Token-Ring network. Therefore, (with the right software configured) - an RS/6000 can "talk" TCP/IP over a Token-Ring, or "talk" SNA over a - Token-Ring, or both. The two protocol suites can coexist on the same - Token-Ring without influence or interference. When your SUNs are doing - 327x emulation, their emulation software is talking to the controller - using SNA protocols. This has nothing to do with TCP/IP. - -Russ Heise, AIX TEchnical Support, IBM Firstly, the poster linas in Austin stated that there is "No Way" to hook Suns to an SNA Network. I have Suns doing 327x emulation, consider it a connection to our SNA network, and know the difference between it and TCP/IP. Based on your posting above, Russ, I'm confused again. I thought I was no longer confused last month when you posted the following: -From: RAH@IBM.COM ("Russell A. Heise") -Subject: RS/6000 Communications -Date: 16 Jul 90 19:29:51 GMT - eddjp@althea.UUCP (Dewey Paciaffi) writes: -> My company is buying RS/6000s. We have an SNA network that serves a number -> of sites, tied to a 3090 at the Corporate Headquarters. -> -> We would like RS/6000s at different locations to communicate over the -> SNA backbone. This communication would be preferably TCP/IP. Is there -> a product available or in development that would allow this? -Yes, you may wish to consider one of the following options: -a) o Install VM-TCP/IP (or MVS-TCP/IP) on the 3090 nearest to each RISC - System/6000. I am assuming that you have more than one 3090! - o Connect each RS/6000 to the local 3090 via Token-Ring or Ethernet. - VM-TCP/IP can talk directly to both types of networks. - o Activate the SNA Network Link feature of VM-TCP/IP to gateway TCP/IP - packets between the two local area networks *over* the SNA network. ^^^^^^^^^^^^^^^^^^^^^^^^ You said TCP/IP can be transported over SNA, with the proper hardware and software configuration. This agreed with what I had heard elsewhere. In today's posting you call SNA and TCP apples and oranges, and seem to say that TCP is not transportable over SNA. Does the VM-TCP Gateway product encapsulate the TCP-IP Packets in SNA Packets? For my purposes this constitutes transporting TCP/IP over SNA. I know that native TCP doesn't work over SNA, which is why I asked the original question in the first place. -- Dewey Paciaffi eddjp@althea.UUCP