Re: WAN design -- MIDRANGE-L

I think the term used is called SNA spoofing.  The Vanguards do local SNA
conversation with the LU before it passes the RR to the remote station. So
in essence the SNA device is really talking to the Vanguard, establishes a
conversation and then talks over the WAN to the host/controller.   The
Vanguards are great little units, however they can be a bear to set up.  No
fancy little wizards to do all the work.  Now that I have learned how to
config them, I love them.
Regards,
Carl
Carl Galgano
EDI Consulting Services, Inc.
http://cgalgano.home.mindspring.com
mailto://cgalgano@ediconsulting.com
(770) 422-2995

-----Original Message-----
From: Larry D. Bolhuis <lbolhui@ibm.net>
To: MIDRANGE-L@midrange.com <MIDRANGE-L@midrange.com>
Date: Saturday, October 03, 1998 8:34 PM
Subject: Re: WAN design


|I have used the IBM 2210 for similair functionality.  The 2210s
|support Dlsw which sends the SNA frames over TCP/IP.  An additional
|advantage is that on the host end you only need an Ethernet or
|Token-ring no SDLC serial lines to the router from the AS/400.  Dlsw
|routes the frames to the AS/400 vie the LAN on the host end, so the
|AS/400 thinks the router is on the LAN when it is actually on a standard
|SDLC serial line.  Your basic 2210 with serial two ports (One for the
|frame and one for the 53/5494) + Enet is pretty cheap too.
|
|  This solution also minimizes SNA timeouts and traffic over the Frame
|as do the Vanguards.
|
|  Larry Bolhuis
|  Arbor Solutions, Inc
|  lbolhui@ibm.net
|
|Carl Galgano wrote:
|>
|> Dave:
|> I have done the connectivity to FR 2 ways.
|> 1.  Total TCP/IP, using the Ethernet port on the AS400, Cisco routers and
|> MCI FR.  This has worked very well, but the support was only for PCs
|> connected, no dumb terminals.  I guess you could use a 5494 that
connected
|> ethernet to the router  and then hang some dumb tubes off the twinax
ports.
|>
|> 2.  SNA over RF using Motorola Vangurad family MP routers.  V35
connection
|> to the Vanguard, supporting dumb tubes hung off a 5494.
|>
|> Both solutions work well.  The SNA over FR is more complicated to set up,
|> but once in place works well.  I guess the bottom line is how much SNA
|> traffic do you need to handle.  If you are only doin IP, I'd go for #1.
The
|> cost of the Vanguard routers may offset the savings of using the green
|> screens. If I were you, I'd keep it the same for each location, either
all
|> TCP/IP or all SNA over FR.
|>
|> Just my opinions, let me know if you have any specific questions.
|>
|> Carl
|>
|> Carl Galgano
|> EDI Consulting Services, Inc.
|> http://cgalgano.home.mindspring.com
|> mailto://cgalgano@ediconsulting.com
|> (770) 422-2995
|>
|> -----Original Message-----
|> From: BORING, David <dboring@shl.com>
|> To: 'MIDRANGE-L@midrange.com' <MIDRANGE-L@midrange.com>
|> Date: Friday, October 02, 1998 8:31 PM
|> Subject: WAN design
|>
|> |I've got a project coming up where I will have the ability to completely
|> |renovate a client's LAN and WAN. I would like to get some input from all
|> |of you who may be using some of these topologies to see what seems to
|> |work best with the AS/400.
|> |
|> |First off, we will try to go TCP/IP over Ethernet as much as possible,
|> |replacing most green-screen terminals with PC's, but we will probably
|> |end up with a couple small sites using twinax terminals (1 terminal and
|> |1 printer that get used 15 minutes every other day is not what we want
|> |to try to support as a PC). My first thought is to put everything onto
|> |frame relay and use some routers to connect all the sites. Most sites,
|> |except the small ones, would probably get connected with a T1 line into
|> |the frame relay network. Could any of you shed some light on your WAN's
|> |and how you have them set up? Especially in regards to the routers (I'm
|> |green on them) and how you handle sending SDLC traffic across the frame
|> |relay network; I've read here about problems some of you have had in the
|> |past with SDLC over frame relay and I'm curious what solved the problem.
|> |
|> |We are also considering printing options. We currently have
|> |twinax-connected laser printers and a 6252 printer in place. We are
|> |thinking of replacing the twinax-connected laser printers with HP
|> |LaserJet 8000's with a MPI Blue Kit IPDS chip and a JetDirect card. We
|> |are also considering replacing the 6252 with something faster, such as a
|> |6262. What are you doing for printing to the laser printers? Should I
|> |use the MPI twinax cards as well or stick with a pure Ethernet
|> |environment? What are all of you doing for your high speed impact
|> |printing? Especially in a TCP/IP Ethernet environment.
|> |
|> |Sorry for the long post and all the questions, but I would appreciate
|> |any information anybody could provide. Please feel free to E-mail me
|> |directly at: dboring@shl.com .
|> |
|> |Thanks in advance!
|> |
|> |David Boring
|> |Systems Engineer
|> |MCI Systemhouse
|> |Direct: (562) 809-5460
|> |E-mail: dboring@shl.com
|> |
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