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Conference noted::atm

Title:	atm

Moderator:	NPSS::WATERS

Created:	Mon Oct 05 1992
Last Modified:	Thu Jun 05 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	970
Total number of notes:	3630

864.0. "X.25 and ATM" by TKOV51::EGAWA (Kiyoshi Egawa DTN:699-7215 SalesSupport/Japan) Wed Mar 12 1997 06:14

Hi,

I'm not familar with ATM functionalities. A technical support engineer said 
it cannot be able to do, other engineer it will be ok.

Please anyone suggest on my concern.

Customer is planning their own VAN(Value Added Network) on ATM network. One 
of issues is interoperability with the lagacy X.25 "bare" interface.
Could Digital UNIX and WAN support (X.25) support below configuration ?
Basically customer requires a box which can connect both X.25 and ATM 
directly, but I think it will be impossible.

      Legacy System
        +-------+                    +-------+
	|	|      (~~~~~~~)     |DECNIS |
	|	+-----(  X.25   )----|       |
        +-------+      (_______)     +---+---+
                                         |  LLC2 + X.25L3
                                     +---+----------+----+ Ethernet
                                                    |
                                                    |
          +--------+                            +---+---+X.25 relay system
          |        |  LANE  (~~~~~~~~)  LANE    |       |
          |    ??? +-------(   ATM    )---------+       |
          +--------+        (________)          +-------+
          ??? : I'm not sure.                   Digital UNIX 
                                                WAN support 

Any help will be appreciated.

Kiyoshi

T.R	Title	User	Personal Name	Date	Lines
864.1		SMURF::MENNER	it's just a box of Pax..	`Wed Mar 12 1997 23:02`	6
	The digital unix system could be multihoned (i.e,. be connected to both an ATM network and a X.25 network) and route between the two. Be aware although i worked some on X.25 (actually BX.25) in a prior life, i don't pretend to understand all the technical details of X.25.
864.2		netrix.lkg.dec.com::thomas	The Code Warrior	`Thu Mar 13 1997 09:02`	6
	There's no reason why couldn't put a sync interface into the same box having the ATM interface thus ridding the need for the DECNIS. Of course, there's still the issue that an X.25 kit for DIGITAL UNIX V4.0 is still a couple of months away...
864.3	FDDI, Ethernet, and more worked already...	KAMPUS::BRANDNER	That's noot eentiiirly aaacuuraate ...	`Thu Mar 13 1997 10:15`	12
	In early 1995 we already routed traffic from ATM to FDDI and Ethernet (and prototype E3- and HSSI-Adapters) and vice versa just by using a DEC 3000 500 and DIGITAL UNIX (V3.0B these days... later on V3.2). We needed it and there hadn't been any router or switch to do so at this time (at least from DIGITAL). So go ahead with .2s suggestion. Besides the time constraints there's really no reason not to do so. Rudi
864.4	In a box	TKOV51::EGAWA	Kiyoshi Egawa DTN:699-7215 SalesSupport/Japan	`Mon Mar 17 1997 07:15`	23
	Thank you very much for your replies. My understand in below is correct ? I think no customizations (application programs) are needed. Am I correct ? In an alpha box , Can WANsupport X.25 capability run on LANE ? +--------+ +--------+ -+ \| X.25L3 \| \| X.25L3 \| \| +--------+ +--------+ + WAN support X.25 PSDN ------ PBXDP-Ax \| LAPB \| \| LLC2 \| \| X.25 relay system \| +--------+ +--------+ -+ \| \| LANE \| \| \| +---+----+ \| +-------Box------------ \| -------+ \| \| ATM Thanks, Kiyoshi
864.5		netrix.lkg.dec.com::thomas	The Code Warrior	`Mon Mar 17 1997 09:37`	3
	Since LLC2 does not use multicasts, I see no reason why that configuration would not work. However, no testing of DECnet/OSI or X.25 over LANE has been done (and there are no resources to perform the testing anyway).