X.25/X.121 address registration

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4 total messages Started by Bob Whitehouse Wed, 26 Jun 1991 12:53

#1363

Author: Bob Whitehouse
Date: Wed, 26 Jun 1991 12:53

21 lines
1027 bytes

Question:  Who is responsible for the allocation of X.121
           address name space;

		1) In general ?

		2) In the UK and France ?

I am thinking in particular about public X.25 networks, and
how they integrate with private networks. This must be a common
problem for multi-national companies who have private X.25
networks in various countries and want to use an international service
(e.g. Tymnet) to bridge them. 


Is this just a free-for-all situation ? or are the public
network operators regulated ? 

I will summarise the answers and post to the group.


bobw@gapos.bt.co.uk

QLLC

#1367

Author: spencer shafer
Date: Wed, 26 Jun 1991 22:36

10 lines
948 bytes

By implementing QLLC on my IBM beastie, can I run both SNA and OSI 
protocols over the same X.25 link?  Have been told that this would
eliminate the need for a separate connection for each.  True?

Dave Love

********************************************
*             SPENCER SHAFER               *
*       shafer@handel.cs.colostate.edu     *
********************************************

Re: QLLC

#1373

Author: David Skeen
Date: Thu, 27 Jun 1991 20:47

13 lines
1300 bytes

In article <15733@ccncsu.ColoState.EDU> shafer@handel.CS.ColoState.Edu (spencer shafer) writes:
   By implementing QLLC on my IBM beastie, can I run both SNA and OSI 
   protocols over the same X.25 link?  Have been told that this would
   eliminate the need for a separate connection for each.  True?

If your beastie is a 9370, you can define one LINE under the X.25 PORT
(in the PACKET major node) with USER=VCNS.  That LINE is used for
multiple OSI/CS virtual circuits.  This holds for VM/VTAM V3R3 and the
corresponding VSE release.
--
Dave Skeen                     IBM Internal: dls@achilleus.austin.ibm.com
D61/803  Zip 2603              IBM VNET:     SKEEN at AUSTIN
Austin, TX 78758               Internet:     dls@dce.austin.ibm.com

X.25/X.121 address registration

#1378

Author: Erik Skovgaard
Date: Fri, 28 Jun 1991 15:47

15 lines
1104 bytes

Clearly, the CCITT is responsible for the allocation of the Data Country
Code (DCC) and in some cases also the Data Network Identification Code
(DNIC).

The DCC is the first 3 digits of the 4-digit DNIC.  Each contry's
Administration ((i.e. voting CCITT member) is then responsible for
the assignment of the last digit.  In some cases a country has more
than 10 data networks, so the Administration has to go to the CCITT for
additional DCC.

Some DNICs are allocated by the CCITT.  They are for instance, the maritime
packet networks (DNIC=1111 covers the Atlantic Ocean, 1112 the Pacific).

Hope that helps.
                                                    ....Erik.

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