************************************************************************ 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.