[comp.protocols.tcp-ip] Serial line IP packages over a net

swansonc@acc.stolaf.edu (Chris Swanson DDN:(CDS6)) (03/04/91)

Helo out there in netland,

I am looking for a way to hook my system into an Internet feed in
another town.  The simplest method would be to hang a modem off of
both machines (mine an Amiga 3000UX and the other site a SparcStation
2) and run SLIP, PPP, or dialupip over a regular phone line between
us.  There are two problems with this, first the LD charges (same area
code, different local telcoms) and second the use of a valuable serial
port in the back of the SS2.

Another method of accessing the SS2 seems to clean up both of these
problems, but I am not sure if one of the serial line ip packages
would work over it, some have said that it would and others have said
that it wouldn't as part of the connection is itself packetized.

Here's the set up.  Let's say I am in city A and the SS2 is in city B.
There is a terminal server in city A that has modems hanging off of it
and can connect to the SS2 in city B over a DECnet or TCP-IP
connection (I am not sure which).  Here's the question, would any of
the serial line ip packages (SLIP, PPP, or dialupip) be able to run
over this kind of connection ([mybox]-[modem]-[modem]-[terminal
server]-[SS2])?  Has anybody done this or know if it could be done or
not?

On a related note, has anyone run one of the SLIP or like packages
over a connection facilitated by a pair of 2400 bps V42.bis (4 to 1
compression) modems (I know - SLOW, but they are cheap and what I have
available to me right now.)

Please respond via e-mail as I can not always read news.  I will share
any answers either via e-mail or, if volume dictates, I will post a
summary.

Thank's in advance,

	-Chris
--
Chris Swanson, Chem/CS/Pre-med Undergrad, St. Olaf College, Northfield,MN 55057
  DDN: (CDS6)	INTERNET:  swansonc@acc.stolaf.edu	UUCP: swansonc@stolaf
  AT&T:		Work: (507)-645-6845			Home: (507)-663-6424
	I would deny this reality, but that wouldn't pay the bills...

swansonc@acc.stolaf.edu (Chris Swanson) (03/06/91)

Well here is the followup I said I would post.  It seems that, using a
"plain, no frills" terminal server, you are out of luck, however there
are terminal servers that do support SLIP (some even support PPP).
With these servers, you connect to the server as a regular session and
then do the commands to start SLIP (something like "set terminal
internet slip enable") and go back and start your SLIP connection
without dropping the line.

With these servers (Xyplex, Cisco, and some others) you do not even
need to continue your SLIP link to a "gateway" machine.  The server,
in fact, acts like a slow router.  Once you are SLIP'd to the terminal
server, that is on the desired network, you are connected and
_shuldn't_ need to do anything else then set up some nameservers if
needed.

There has been concern expressed about running a SLIP connection with
a lot of high-density trafic over a terminal server as possibly being
detrimental to throughput for other users.  My application will be a
very low density connection, however.

Any more comments or questions are wlcome.

Thank's again,

	-Chris

--
Chris Swanson, Chem/CS/Pre-med Undergrad, St. Olaf College, Northfield,MN 55057
  DDN: (CDS6)	INTERNET:  swansonc@acc.stolaf.edu	UUCP: swansonc@stolaf
  AT&T:		Work: (507)-645-6845			Home: (507)-663-6424
	I would deny this reality, but that wouldn't pay the bills...

BILLW@MATHOM.CISCO.COM (William "Chops" Westfield) (03/06/91)

    Here's the set up.  Let's say I am in city A and the SS2 is in city B.
    There is a terminal server in city A that has modems hanging off of it
    and can connect to the SS2 in city B over a DECnet or TCP-IP
    connection (I am not sure which).  Here's the question, would any of
    the serial line ip packages (SLIP, PPP, or dialupip) be able to run
    over this kind of connection ([mybox]-[modem]-[modem]-[terminal
    server]-[SS2])?

A good number of todays terminal servers support SLIP directly.  Some
even support PPP.  This would solve your problem more convieniently.

Bill Westfield
cisco Systems.
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