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- ************************************************************************
- DDN MGT Bulletin #102 DISA DDN Defense Communications System
- 6 October 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 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).
- ************************************************************************
-
- MILNET PSN SCHEDULED SERVICE INTERRUPTIONS
-
- This DDN Management Bulletin is provided as guidance on how to submit
- requests for DDN MILNET PSN Scheduled Service Interruption requests
- for approval. In the past few months DISA/DODM has received numerous
- requests for scheduled downtime at DDN MILNET PSN facilities without
- proper coordination and end user validation. Further, DISA/DODM has
- received requests thru the CONUS MILNET Monitoring Center (CMMC) from
- Node Site Coordinators. The CMMC is not authorized to approve Scheduled
- Service Interruption requests without prior approval from DONC/DODM.
- Also requests for Scheduled Service Interruptions should not be submitted
- to the CMMC, unless as INFORMATION ONLY.
-
- Procedures and guidelines for DDN MILNET PSN Scheduled Service
- Interruptions are in DISA (DCA) Circular 310-70-1*, DCS Systems Control,
- Volume II, Operational Procedures TCF/PTF/MTC's, Change 1, 22 December
- 1989, Chapter 8. Data Switched Networks, paragraph 2.r, pages 8-16 thru
- 8-19. This DISA Circular applies to military departments (MilDeps), and
- other activities of DOD or governmental agencies responsible for
- operation, maintenance and management of the DCS (Defense Communications
- System), which includes DDN MILNET PSNs and its Interswitch Trunks (ISTs).
-
- Request all future requests for DDN MILNET PSNs Scheduled Service
- Interruptions be submitted as directed by DISA Circular referenced above.
- If your DDN MILNET PSN site does not have a copy of this DISA Circular,
- please check with your local Techincal Control Facility (TCF), Patch and
- Test Facility (PTF) or Nodal and Access Switch Monitoring and Test Centers
- (MTCs), they are required to have copy of this DISA Circular, which you
- could use for your scheduled service interruption request. This DISA
- Circular can also be ordered thru your local Publication Distribution
- Office (PDO) or Base administration office. All Node Site Coordinators
- should either have this DISA Circular on hand or be made available from
- your local Technical Control Facility.
-
- The following excert from 310-70-1, DISA(DCA) Circular 310-70-1, Volume II,
- Chapter 8, Data Switched Networks, paragraph 2.r, pages 8-16 thru 8-19 is
- quoted for your guidance:
-
- QUOTE.
- r. SCHEDULED SERVICE INTERRUPTIONS. Chapter 4 of this
- Circular estabilishes the policy and procedures for scheduling
- DCS service interupptions. For DDN, all PSN interruptions are
- scheduled according to chapter 4, paragraph 2c, "Interruption of
- user service (other than complete DCS station)". All other
- facilities supporting the DDN backbone are scheduled as directed
- in chapter 4, paragraph 2h, "Interruption of user service (DCS
- tail station)". Paragraphs referenced in chapter 4 only task
- the TCF/PTF of the station being interrupted to take action.
- For DDN, this tasking is expanded to any DCS supporting agency
- requesting a DDN facility be taken out of service. The
- following exceptions to chapter 4 apply to DDN:
-
- (1) Interruption of service of one (1) hour or less.
- Requests for service interruption will be verbally passed to the
- appropriate area DOCC element when the projected service
- interruption is expected to be one (1) hour or less and impairs
- the operational capability of any DDN backbone element.
-
- (a) This coordination shall be accomplished no
- later than 24 hours prior to the start of the outage.
-
- (b) All approved service interruption requests
- will be documented in the master station log in each affected
- DOCC element.
-
- (c) The appropriate MC (Monitoring Center) will notify
- affected node site coordinator (NSC) no later than 18 hours prior to an
- approved outage. Any downtime adjustments will be made during
- this coordination and final downtime will be set.
-
- (d) Thirty minutes prior to the actual outage, the
- person(s) taking the element(s) out of service will telephone
- the appropriate DOCC element for final approval. This is
- necessary to confirm current network posture and avoid any
- operational conflicts caused by real-time operating problems.
-
- (2) MC directed cancellations. Any service
- interruption request which may cause or contribute to a problem
- which will seriously impact the operational capability of the
- respective DDN backbone, will be cancelled by the respective
- area DOCC element. The appropriate MC(s) will immediately
- notify the service interruption requestor of any cancellations.
- The affected NSC will be notified of cancellations, as time
- permits.
-
- (3) Inter-area outages. Service interruptions
- impacting inter-area connectivity will be requested of an
- approved by the responsible area DOCC element. The responsible
- DOCC element will coordinate all inter-area outages with the
- distant-end area DOCC element prior to granting final approval.
-
- (4) Interruption of service to tail PSN(s). PSN's
- which are connected to the DDN backbone through a single IST,
- are considered tail PSN's (commonly referred to as "stub" or
- "string" PSN's). Tail PSN's will follow procedures outlined in
- chapter 4, paragraph 2c although chapter 4, para 2h, refers to
- minimum requirements for tail stations.
-
- (5) Relocation of PSN(s). To accomodate changes at
- the local site level, relocation of a PSN is occasionally
- required. Due to the lead-time needed to move the PSN equipment
- and supporting telecommunications, a one year notification is
- required in addition to the notification identified in chapter
- 4.
-
- (a) One year advance notice of a proposed PSN
- equipment relocation is required to properly plan, schedule,
- survey, and accomplish the relocation. Notice will be made by
- the PSN sponsoring command or agency via AUTODIN message to DCA
- Washington DC//DDO// with an information copy to the appropriate
- DCA area and O&M command. This message will contain, as a
- minimum, the following information:
-
- 1. Node name and number.
-
- 2. Node site coordinator (NSC): Name, DSN
- and commercial phone numbers, AUTODIN plain language address
- (PLA) and E-mail address.
-
- 3. Current node location: Building, room,
- address.
-
- 4. Proposed node location: Building, room,
- address.
-
- 5. Date relocation must be completed.
-
- 6. Reason relocation required: Include
- impact if not accomplished by date specified.
-
- 7. TSR actions: Explain, in detail, all
- circuit actions.
-
- 8. Proposed schedule: Begin with proposed
- site survey date and show complete sequence of required
- actions. Include resource requirements (i.e. local
- communications unit, engineering and installation units, DDN
- contractor, etc.) proposed for accomplishing the relocation.
-
- 9. Office of primary responsibility: Name,
- DSN and commercial phone numbers, AUTODIN and E-mail address.
-
- (b) Exceptions to the 1 year advance notice will
- be made on a case by case basis. For example, a shorter lead
- time may be possible if all actions can be accomplished by the
- sponsoring command or agency and only record TSR(s) are
- needed. Minimum lead time will be 21 days required for a
- service interruption request. The service interruption request
- will be modified to include the information above.
-
- (c) Headquarters, DCA, code DDO in concert with
- the appropriate DCA area, will review and approve all relocation
- request. When approved, the responsible DCA DDN Installation
- Management Branch will issue scheduled service interruption
- request notifications, following the procedures identified
- chapter 4, paragraph 2c.
-
- (d) At no time, is the site authorized to move
- equipment without prior DCA approval. Normally, a site survey
- will be performed and relocations accomplished with DCA,
- sponsoring O&M service agency, local command, and support
- contractor participation. Additionally, the requesting
- organization may be required to provide funding to support the
- cost of the site survey.
- UNQUOTE.
-
- If your organization is unable to comply with Chapter 8, above, due
- to EMERGENCY notification of a scheduled service interruption, then
- please contact DISA/DODM DSN 222-7582, commercial 703-692-7582,
- immediately for verbal approval of the scheduled service interruption.
- However, pleaee remember this only be done on a case by case basis and
- IS NOT to be used for ROUTINE scheduled service interruptions. Don't
- forget, that DDN direct connect users to the PSN's also must concur
- with the scheduled serivce interruption time frame. Also for EMERGENCY
- type scheduled service interruptions (CONUS Only) they can be
- submitted via E-mail to the following addresses:
-
- Action: milnetmgr@ddn-conus.ddn.mil
- cmcmgr@ddn-conus.ddn.mil
- aopsmgr@ddn-conus.ddn.mil
-
- Information: dca-mmc@cmsc.ddn.mil
-
- For Pacific and European sites, please forward these requests for
- scheduled serivce interruptions to the appropriate DOCC area element.
-
- DISA/DODM point of contact is Mr McDaniel, CONUS Monitoring Center,
- Manager, DSN 222-7582, commercial (703) 692-7582, email address:
- cmcmgr@ddn-conus.ddn.mil.
-