Xref: utzoo comp.protocols.appletalk:2263 comp.protocols.tcp-ip:7808
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!bionet!apple!rutgers!dptg!att!pacbell!pbseps!rdp
From: rdp@pbseps.UUCP (Richard Perlman)
Newsgroups: comp.protocols.appletalk,comp.protocols.tcp-ip
Subject: Macintosh SLIP
Message-ID: <579@pbseps.UUCP>
Date: 25 Jul 89 05:20:40 GMT
Reply-To: rdp@pbseps.PacBell.COM (Richard Perlman)
Organization: Pacific Bell Separations, San Francisco, CA
Lines: 71

[]
I am planning on "bridging" a remote located Mac to the Office LAN.  I
have developed a variety of possibilities...  and would like some help.  

I should note the following 'facts':
	Connection will be at 9600 over async modems (actually Data 
	Over Voice 'modems'; 'DOVs') at each end connected through an
	X.25 Packet switch.  (Connection could be raised to 19.2 
	in the future.)

	Office LAN consists of one LocalTalk zone bridged to
	one ethernet LAN through a FastPath 4.  There is a Shiva
	NetSerial on the LocalTalk and an Annex II terminal server 
	on the e-net.  The Annex can run SLIP.

	One spare Shiva net serial is available for use at the
	remote location if necessary.  The Shiva AppleTalk 'modem'
	driver is installed on the remote.

	My major interest is connecting with our UNIX minicomputer, 
	so getting AppleTalk to work isn't essential if a "really
	good" tcp/ip solution is available.  By the way, we are 
	running CAP on the UNIX box.

Diagram of proposed network possibilities:

        Remote                 9.6 remote/office link         Office
        ^^^^^^                 ^^^^^^^^^^^^^^^^^^^^^^         ^^^^^^
AppleTalk or SLIP
          v
 +-----+  v
 | mac |  v +---------+     packet switched x.25 net     +---------+
 +-----+-_-_| 9.6 DOV |-_-_([][][][][][][][][][][][])-_-_| 9.6 DOV |==rs232
 |_____| x  +---------+                                  +---------+ 
         ^---<Note: Could place NetSerial here

~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-

 Office (cont'd)    {  +-----------+    +----------+
 ^^^^^^^^^^^^^^^    {  | NetSerial |-_-_| FastPath |-_-_-(LocalTalk LAN)
                    {  +---------+-+    +----------+
		    {   AppleTalk+
		    {      +
(rs232 from DOV)-_-_{-_-_-_+         or
                    {      +
                    {    SLIP+
		    {  +-----+----+     {   +-----------+
		    {  |     rs232|-_-_ { -_| NetSerial |-_-_-(LocalTalk LAN)
		    {  |          |     {   + ----------+
		    {  | Annex II |     { or
		    {  |          |     {  
		    {  |  ethernet|xxxx { xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
		    {  +----------+     {            X                 X
		                        { +----------X---------+  +----X-----+
		                        { | UNIX mini computer |  | FastPath |
		                        { +--------------------+  +----------+

So, does anyone know of an "EtherTalk" SLIP driver, or even plain
SLIP for the MAC?  Could I connect to the Annex using slip and
then go back out of the annex serially to the NetSerial?  And what 
experience have you had using 1 (or 2) Net Serials to create a bridge?

Or, what other bright ideas do you have... ?

Preferred; replies by e-mail.  I will summarize and post/forward
results as interest warrants.

Thnx...
-- 
Richard Perlman * rdp@pbseps.pacbell.com || {ames,sun,att}!pacbell!pbseps!rdp
180 New Montgomery St. rm 602,  San Francisco, CA  94105  |*| 1(415) 545-0233