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DDN MGT Bulletin 122             DISA DDN Defense Communications System   
16 April 1993                    Published by: DDN Network Info Center
                                      (NIC@NIC.DDN.MIL)  (800) 365-3642


                        DEFENSE  DATA  NETWORK
                         MANAGEMENT  BULLETIN

  The DDN MANAGEMENT BULLETIN is distributed online by the DDN Network
  Information Center under DISA contract as a means of communicating
  official policy, procedures and other information of concern to
  management personnel at DDN facilities.  Back issues may be read
  through the TACNEWS server ("@n" command at the TAC) or may be
  obtained by FTP (or Kermit) from the NIC.DDN.MIL host [192.112.36.5]
  using login="anonymous" and password="guest".  The pathname
  for bulletins is ddn-news/ddn-mgt-bulletin-nn.txt (where "nn" is the
  bulletin number).
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	Autonomous System Numbers of the Core Servers on MILNET


1. This message provides information on the current autonomous system
numbers of the core server systems on MILNET, including those for the
Pilot Network which interfaces with NSFNET. These numbers are relevant
in initiating BGP sessions, and in deciphering AS-Path information of
BGP routes.

2. The autonomous system numbers are:

		Entity				AS #
	--------------------------------     ---------

	The T/20 core route servers		2490

	FIX-East cisco router			19

	FIX-West cisco router, and		568
	all other Pilot Net routers
	except FIX-East	

	NSFNET/ANSNET T3 backbone		690

	Mailbridge route servers		164
	(will be obsolete by 10 May 1993)

Please note that autonomous system numbers 19 and 568 replace
autonomous system numbers 184 and 164, respectively, in NSFNET/ANSNET's
routing database for DDN routers on FIX-East and FIX-West.

3.  The point of contact for questions/information is:

Mr Mike Eason, DSN 312-222-5584 or 5589
               Commercial 703-692-5584 or 5589
	       e-mail: meason@bbn.com     

Support is available 0800 to 1700 EDT, Monday - Friday.