************************************************************************ 
DDN MGT Bulletin : 9302          DISA DDN Defense Communications System   
12 Nov 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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               Update on the MILNET Transition to BGP

BGP Cutover Less Critical
=========================

        DDN MGT Bulletin 130 stated that all DDN clients must convert
        from EGP to BGP protocol by 1 October 1993. This was based on
        the growth in the number of MILNET gateways advertised in
        routing updates. This number was approaching the 510 gateway
        limit imposed by EGP.

        With the downsizing and reconfiguration of the MILNET, the
        number of gateways has dropped, and it no longer appears that
        the 510 limit will be reached under the current MILNET
        architecture. As a result, there is no longer a critical need
        to transition from EGP to BGP.

        However, BGP remains the recommended external gateway
        protocol and subscribers should maintain the goal of converting
        to BGP:

            1) It is a more efficient protocol which reduces network
               traffic.

            2) It is more robust, better able to detect and prevent
               routing loops.

            3) It will prepare subscribers for upcoming network
               architectures which will likely eliminate EGP.

        At this time DISA has not established a mandatory BGP implementation 
        deadline. When a new deadline is established, we will notify all 
        users at the earliest possible date.

        Please refer questions concerning this matter to Capt Lent, 
        DISA/UTDS, DSN 222-2757/COMM (703) 692-2757 or E-Mail address
        lentj@cc.ims.disa.mil.


Required Software/Firmware Versions
===================================
  
        GateD users should run 3.0Alpha software or later.

        Cisco users should refer to "Notes for Cisco Users", below.

        ROUTER/GATEWAY ADMINISTRATORS FOR NON-CISCO OR NON-GateD ROUTERS
        SHOULD CONTACT THE APPROPRIATE VENDOR(S) TO DETERMINE THE 
        REQUIRED SOFTWARE VERSION TO DO BGP.


Notes for Cisco Users
=====================

        The following information is provided by cisco systems:

        The following recommendations will assure interoperability
        between Cisco "customer premise" routers and the MILNET BBN
        T/20 backbone nodes. STAYING WITH 9.0.x SOFTWARE FOR CSC/3
        BASED SYSTEMS WILL HELP AVOID THE MEMORY ISSUES CURRENTLY
        BEING EXPERIENCED ON SOME CSC/3 SYSTEMS running 9.1.x.

                System Type             Cisco software revision
        ---------------------------     -----------------------
        CSC/3 68020 CPU w/ 4MB RAM          9.0.5    (or later)
        CSC/4 68040 CPU w/ 16MB RAM         9.1.4(3) (or later)


        APPROXIMATE #OF IP ROUTES WHICH CAN BE HELD IN MEMORY:

                System Type         Total IP Routing Table Entries
        ------------------------    ------------------------------
        CSC/3  4MB RAM  9.0.X SW                4000-5000
        CSC/3  4MB RAM  9.1.X SW                1000-2000
        CSC/4 16MB RAM  9.1.X SW                40,000

        CLNP/CLNS routing table entries can be significantly larger,
        hence less entries may be accommodated.

        CISCO SYSTEMS STRONGLY RECOMMENDS THAT ALL CUSTOMERS UPGRADE
        TO CSC/4 68040 W/ 16MB RAM AND THE MOST CURRENT SOFTWARE
        RELEASE IN THE 9.1 TREE (CURRENTLY 9.1.7)

        SOFTWARE UPGRADES MAY REQUIRE MICROCODE UPGRADES FOR ROUTER
        INTERFACE CARDS. Software upgrades and microcode upgrades are
        free of charge to cisco maintenance customers or customers
        under standard warranty (90 days).

        CSC/4 CPU card upgrade can be accomplished via ordering:

        Part# CSC/4U @ $3600 (GSA schedule GSOOK-91-AGS-5016 PS07
        (expires 3/31/94)) (SOFTWARE NOT INCLUDED).

        Software upgrades for non-maintenance customers is $495.00
        per chassis (GSA schedule GSOOK-91-AGS-5016 PS07 (expires
        3/31/94)).

        Microcode upgrades for non-maintenance customers is $500.00
        per interface card.

        Contact cisco systems for additional upgrade information and
        specific microcode upgrade part numbers.