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- DDN MGT Bulletin #110 DISA DDN Defense Communications System
- 8 December 1992 Published by: DDN Network Info Center
- (NIC@NIC.DDN.MIL) (800) 365-3642
-
-
- DEFENSE DATA NETWORK
- MANAGEMENT BULLETIN
-
- The DDN MANAGEMENT BULLETIN is distributed on-line 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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-
- NSFNET T-1 Changeover to T-3 Backbone
-
- Ref: DDN Mgt Bulletin #99, Change of Architecture for MILNET/NSFNET
-
- This message provides important guidance and status information concerning
- communication between MILNET and the non-DoD Internet (i.e., NSFNET.)
-
- 1. On Wednesday, Dec. 2, the last NSFNET T-1 router was moved to
- connect to the NSFNET T-3 (140.222.0.0) backbone service. As of 12:01
- a.m. EST on Wednesday, Dec 2, the T-1 NSFNET Backbone (129.140.0.0) no
- longer exsists. With its passing, DDN customers using gateways/
- concentrators are requested to change their default IP network to
- 140.222.0.0 vs. 129.140.0.0.
-
- DEFAULT ADDRESS 129.140.0.0 WILL BE REMOVED 1 FEBRUARY 1993, SO PLEASE
- MAKE THE CHANGE BEFORE THIS DATE TO PREVENT UNNECESSARY DELAYS IN
- INTERNET TRAFFIC.
-
- 2. In an effort to provide a smooth transition to subscribers exchanging
- traffic between MILNET and NSFNET, a temporary routing mechanism has
- been implemented to interconnect MILNET and NSFNET via the FIX-East and
- FIX-West Internet Protocol routers (IPRs) on the DISN-NT Pilot Network.
- For address resolution, a static route pointing traffic destined for
- network 129.140.0.0 to network 140.222.0.0 has been added at each
- FIX-point. Note that this routing mechanism is only temporary; it will
- be removed as of 1 February, 1993.
-
- 3. MILNET hosts will continue to statically default to the IPR closest
- to them, and MILNET gateways will obtain a dynamic default for NSFNET
- traffic via EGP updates from the Mailbridges. The default IPR will now
- be advertised as the next hop to both the default NSFNET backbone
- network, 140.222.0.0, and to network 0.0.0.0 .
-
- 4. In addition to the Ciscos at FIX-West and Ft. Detrick, the Cisco IPRs
- on the Pilot Network are default gateways providing store-and-forward
- functionality for MILNET users. MILNET gateways will obtain the proper
- default IPR via EGP updates with the Mailbridges.
-
- 5. Mailbridges now provide routing information about MILNET networks,
- one NSFNET backbone network (140.222.0.0), and network 0.0.0.0 in their
- EGP updates. In addition, the Mailbridges are configured with a list of
- IPRs to use as default gateways for traffic destined for NSFNET. The
- default IPR is advertised as the next hop to BOTH network 140.222.0.0--
- the new T-3 NSFNET backbone network--and to network 0.0.0.0.
-
- 6. DISA point of contact is Mr. McDaniel:
- (DSN) 222-7580
- Coml (703) 692-7580
- E-mail: cmcmgr@ddn-conus.ddn.mil
-
-