Movatterモバイル変換

Network Working Group                              J. McQuillanRFC #331                                           BBN-NETNIC #9924                                          19 April 1972Category:  B.1                     IMP System Change Notification     We are planning to release IMPSYS 2600 on May 15, 1972, be- tween12 noon and 3 p.m. E.D.T.As discussed at the March 16 seminar heldat BBN, this release constitutes a major change to the IMP program.Because of the magnitude of the change, the system will be released onan experimental basis.  If problems develop, then the current system,IMPSYS 2514, will be reloaded and the cutover for IMPSYS 2600 will berescheduled for some later time.     The actual transfer over to IMPSYS 2600 will require assis- tancefrom site personnel, and we hereby request this assistance.  A newtape of IMPLOD 2600 will be mailed to all sites shortly, and the staffat BBN will request each site in turn on May 15 to load the new IMPLODtape and will detail other procedures to follow thereafter.  We preferthat each site have someone who is familiar with IMP system operationon hand at this time.  At some sites, we may request additionalassistance from the computer operations staffs or programmers in thecase of any problems.  We also advise site personnel to refrain fromscheduling produc- tion over the Network during the hours ofswitchover, since unforeseen difficulties may arise.     It is anticipated that the Hosts will not see any first- ordereffects from the switchover.  Leader formats and message types are notchanged.  On the other hand, the statistics package has beenextensively modified, and the NMC has been notified of these changes.The Very Distant Host option will also be included in this new systemrelease, and it is expected to be activated for use about June 1.  Thedetailed changes to the IMP system will be described in a forthcomingrevision to BBN Report 1822.     Finally, your patience is requested if the new system causesunforeseen problems.JMcQ/jm       [ This RFC was put into machine readable form for entry ]       [ into the online RFC archives by BBN Corp. under the   ]       [ direction of Alex McKenzie.                   12/96   ]                                                                [Page 1]