[comp.dcom.sys.cisco] Replacing and SNA VAN with a TCP/IP one

remaker@brahms.amd.com (Phillip Remaker) (11/06/90)

Currently, our company uses a SNA VAN to service the field offices. 
I contend that we could probably get a TCP/IP VAN cheaper and that
we could get increased functionality from it.

The problem is that we have to transparently replace the current VAN
before we can get management buy in.

The only thing they do in those offices is terminal and print service
from a 3174 cluster controller, which in turn has a xxx kbps SLDC 
connection to the VAN.

Now, is there anything I can do with a cisco product to make a virtual 
SDLC circuit over a TCP/IP VAN?  I figured a 19.2k or 38.4k circuit
from terminal server to terminal server would do fine as the terminal 
server packetizes the data at one end and unpacketizes it at the other.
Is this possible?  I have asked about forming virtual circuits before and
I seem to remember that they are not supported, or not yet or something.

Also, if the brute force virtual circuit is not the answer, can we
do it a more elegant way?  Ideally, we'd have them all run tn3270, but
it is hard to just throw out so many cluster controllers.  The migration
is a long-term strategy, but we have to proceed slowly and show that 
there is more functionality to be had by using TCP/IP.

I admit that my SDLC knowledge is SLIM, and my proposals may be way
too naive.  However, I am open to suggestion.  Has this been done with
cisco products?

Help stamp out SNA!  Send me some hints 8-).


--
Phillip A. Remaker A.M.D. M/S 167 P.O. Box 3453 Sunnyvale, CA 94088-3000
TCP/IP internetworking from hell. DoD #185 remaker@amd.com  408-749-2552   
   Things to do today:  1) Get a clue.  2) Get a job.  3) Get a life.