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- **********************************************************************
- DDN MGT Bulletin 42 DCA DDN Defense Communications System
- 2 Nov 88 Published by: DDN Network Info Center
- (NIC@SRI-NIC.ARPA) (800) 235-3155
-
-
- DEFENSE DATA NETWORK
-
- MANAGEMENT BULLETIN
-
- The DDN MANAGEMENT BULLETIN is distributed online by the DDN Network
- Information Center under DCA 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 SRI-NIC host [26.0.0.73 or
- 10.0.0.51] using login="anonymous" and password="guest". The pathname
- for bulletins is DDN-NEWS:DDN-MGT-BULLETIN-nn.TXT (where "nn" is the
- bulletin number).
- **********************************************************************
-
-
- PHASE II OF THE MILNET DOMAIN NAME IMPLEMENTATION
-
-
- Effective with this Bulletin, the DDN Network Information Center (NIC)
- will no longer accept new registrations in the ".ARPA" domain for use
- in the Official DoD Host Internet Table or the DDN Domain Naming
- System. The NIC will handle registrations currently in progress on a
- case-by-case basis to resolve their naming issues.
-
- In addition, MILNET hosts currently registered in the ".ARPA" domain
- will undergo name changes to transfer them to the ".MIL" domain.
-
-
- BACKGROUND
-
- This action is necessary to deal with the increasing number of hosts
- joining the Internet. The host table currently consists of over 6000
- host entries, and contains more than 600,000 bytes of data. Since new
- hosts are added every time the host table is updated, and since it must be
- transfered to each host on the network, it is clearly becoming
- increasingly expensive in terms of network resources to maintain the
- table. Eventually, the host table will be impossible to maintain on a
- timely basis.
-
- The Domain Name System provides decentralized naming and addressing
- which is an efficient alternative to maintaining a centralized
- host table. A central registry need provide information only on
- where to find name and address resolvers for a relatively small number
- of organizations. Those resolvers provide information for hosts and,
- optionally, sub-organizations within the top-level organization. The
- domain system provides as many levels of sub-organizations as necessary.
-
- This bulletin describes Phase II of the transition to the Domain Name
- System. The first phase eliminated all nonconforming, old-style,
- hostnames and nicknames; all host names were changed to fully qualified
- domain names by adding the ".ARPA" domain designation to
- all names in the host table. Phase II, effective as of the date of
- this bulletin, requires that all MILNET, ARPANET, and Internet hosts
- be registered in established domains other than ARPA.
-
- As of 15 November 1988, all new hosts will be registered directly into an
- established domain other than ARPA. In addition, all currently
- registered MILNET and ARPANET hosts will undergo hostname changes so
- that they are also part of such an established domain.
-
- Please note this Bulletin requires HOSTNAME CHANGES ONLY. This action
- is being taken to set up a clear migration path for MILNET hosts into
- the DDN Domain Name System.
-
-
- ".MIL" DOMAIN NAME STRUCTURE
-
- The domain name MIL was originally defined for use by military
- organizations. Several second-level domains have been established as
- subdomains to the MIL top-level domain. All new MILNET hosts must be
- registered under one of these second-level domains as a node at the
- third level or below in the hierarchical domain naming tree.
-
- The general rule for an organization to be a second-level domain
- in the MIL domain is that it be a distinct service (Army, Air Force,
- etc.), a unified or specified command (SAC, ADCOM, etc.), or a separate
- operating agency which does not report through service chains (DCA,
- DMA, NSA, etc.). The list below is not exhaustive; other second level
- domains will be added as necessary.
-
- The current second-level domains under MIL are:
-
- AF (Air Force)
- ARMY (Army)
- CG (Coast Guard)
- DARPA (Defense Advanced Research Projects Agency)
- DCA (Defense Communications Agency)
- DDN (Defense Data Network)
- DIA (Defense Intelligence Agency)
- DIS (Defense Investigative Service)
- DMA (Defense Mapping Agency)
- MC (Marine Corps)
- NAVY (Navy)
- NSA (National Security Agency)
- SAC (Strategic Air Command)
- SDIO (Strategic Defense Initiative Organization)
-
- MILNET hosts already registered in the official host table as
- HOSTNAME.ARPA will be required to undergo changes to their names so
- that their official primary name becomes HOSTNAME.SECONDLEVEL.MIL or
- HOSTNAME.ORG.SECONDLEVEL.MIL. "SECONDLEVEL" is one of the
- second-level domains listed above. "ORG" is the organization within
- the service or agency to which the host belongs.
-
- The first form (HOSTNAME.SECONDLEVEL.MIL) will be assigned
- automatically to all registered hosts. The second form
- (HOSTNAME.ORG.SECONDLEVEL.MIL) will be used only in cases where Host
- Administrators indicate they are ready and able to manage their own
- delegated domain. It is our goal to move as many hosts as possible
- into delegated domains to reduce the need for additional name changes
- later.
-
-
- NAMING TRANSITION STRATEGY
-
- The transition period for this changeover begins 1 month after this
- bulletin is issued and continues until complete. We anticipate it
- will take approximately seven months to change the primary host names,
- and nineteen months to eliminate the ARPA domain from the host table.
-
- The name transition will be accomplished in four steps:
-
- Step 1: Unless otherwise directed by the sponsoring host system,
- Operations & Maintenance Commands, or other authority,
- the NIC will assign each currently registered host a new "MIL"
- name (with the consensus of the Host Administrator) that will
- at first become its nickname.
-
- Step 2: After a short adjustment period, the new host nickname will
- become the official primary name, and the original primary name
- will become a nickname.
-
- Step 3: Effective 7 months from the date of this bulletin, primary
- hostnames ending in ".ARPA" will NOT be allowed in the host table
- or domain system files; however, the nicknames ending in ".ARPA"
- will be retained in the host table for a one-year adjustment period.
-
- Step 4: The nickname HOSTNAME.ARPA will be permitted only until
- 1 June 1990. After that time, all nicknames ending in ".ARPA"
- will be disallowed in the host table and DDN Domain Naming System.
-
- During the next seven months, the NIC will notify each Host Administrator
- of the new assigned name for his or her host. Name changes to hosts
- on net 26 during the transition period will require no paper work
- other than EMAIL between the NIC Hostmaster and Host Administrators.
-
- This timetable applies as well to all net 10 (ARPANET) and Internet
- hosts who will be required to join other domains such as EDU, GOV, or
- COM. However, hosts that currently belong to one of several
- already-established MIL subdomains will be granted exceptions to the
- transition timetable. These subdomains administer large numbers of
- hosts whose names conform to the naming scheme of the domain by which
- they are administered (i.e. BRL.MIL, NOSC.MIL, and USNA.MIL.) They
- will be required to change their subdomain names and hostnames by 1
- September 1989 to fit within the newly defined MIL domain.
-
-
- EXAMPLE
-
- During the transition period the NIC host will also undergo a name
- change from SRI-NIC.ARPA to NIC.DDN.MIL. Here is an illustration
- of the name change process using the NIC host as an example.
-
- NIC host table entry before the bulletin:
-
- HOST : 26.0.0.73, 10.0.0.51 : SRI-NIC.ARPA : DEC-2060 : TOPS20 :
-
- Step 1: Addition of nickname during transition period
- (bulletin+1month - bulletin+7months)
-
- HOST : 26.0.0.73, 10.0.0.51 : SRI-NIC.ARPA, NIC.DDN.MIL : DEC-2060 : TOPS20 :
-
- Steps 2 and 3: NIC host table entry at end of 7 month transition,
- and during one-year adjustment period
- (bulletin+7months - bulletin+19months)
-
- HOST : 26.0.0.73, 10.0.0.51 : NIC.DDN.MIL, SRI-NIC.ARPA : DEC-2060 : TOPS20 :
-
- Step 4: NIC host table entry after MIL transition is complete
- (bulletin+19months)
-
- HOST : 26.0.0.73, 10.0.0.51 : NIC.DDN.MIL : DEC-2060 : TOPS20 :
-
-
- TRANSITION TO DOMAIN NAME RESOLVERS
-
- Domain name resolvers are not yet required of MILNET hosts; however,
- voluntary establishment of domain name servers and resolvers by MILNET
- sites will be encouraged. Required establishment of domain name
- servers and resolvers will occur during Phase III of the transition.
- Until that time, the NIC will be providing domain name service for the
- MIL domain. All domains under ".MIL" will be managed by the NIC as
- "undelegated domains" unless and until an organization is ready to
- take responsibility for its domain.
-
- As a minimum, all hosts attached to nets 10 and 26, all hosts acting
- as name servers for ".MIL" subdomains, and other hosts as requested
- will continue to be registered and listed in the host table.
-
-
-
- FURTHER INFORMATION
-
- Background information on the MILNET transition to the DDN Domain
- Naming System can be found in DDN Management Bulletins Nos. 22 and 32,
- and in RFC 1031. General information about the DDN domain naming
- system can be found in several documents available from the NIC: RFC
- 1031, RFC 1032, RFC 1033, RFC 1034, and RFC 1035. For information on
- obtaining copies, contact the NIC by phone at 800-235-3155 or
- 415-859-3695; or send an Email message to HOSTMASTER@SRI-NIC.ARPA.
-
-
- TIMETABLE FOR MILNET DOMAIN TRANSITION
-
- 15 November 1988 Begin hostname changes from ARPA to MIL
-
- 1 June 1989 Completion of changes to all primary host names
-
- 1 June 1990 End phase-out period for ARPA nicknames
-
-
-