    Network Working Group                                   Ellen Westheimer
    Request for Comments: 319                                            BBN
    NIC: 9349                                                 March 21, 1972
    Updates: RFC 315

                              NETWORK HOST STATUS

       This RFC reports on the status of most Network Hosts from February 28
       to March 10.  The ETAC Terminal IMP (Network address 148) was
       installed during this period.

       Several Hosts are currently excluded from the daily testing.  These
       Hosts fall into two categories:

          1) Hosts which are not expected to be functioning on the Network
             as servers (available for use from other sites) on a regular
             basis for at least two weeks.  Included here are:

             Network
             Address          Site            Computer
             -------          ----            --------
             134              MIT-AI          PDP-10
              13              Case            PDP-10
              15              Ames/(Paoli)    ILLIAC/(B6500)

          2) Hosts which are currently intended to be users only.  Included
             here are the Terminal IMP's which are presently in the Network
             (AMES, MITRE, NBS and BBN).  [The BBN Terminal IMP (Network
             Address 158) is a prototype and as such is frequently not
             connected to the Network, but being used to refine and debug
             the Terminal IMP programs.]  This category also includes the
             Network Control Center computer (Network Address 5) which is
             used solely for gathering statistics from the Network.
             Finally, included among these Hosts are the following:

             Network
             Address          Site            Computer
             -------          ----            --------
              7               Rand            IBM-360/65
             73               Harvard         PDP-1
             12               Illinois        PDP-11
             19               NBS             PDP-11

       The tables on the next two pages summarize the Host status for this
       period.

    Westheimer                                                      [Page 1]

    RFC 319                   Network Host Status                 March 1972

                                                              "STATUS OR
    SITE                                                      PREDICTIONS"
    ADDRESS  SITE          COMPUTER    STATUS OR PREDICTION  OBTAINED FROM
    -------  ----          --------     ------------------- --------------
       1     UCLA          SIGMA-7      Server #Limited     Jon Postel
      65     UCLA          IBM-360/91   NETRJS now          Bob Braden
                                        (Telnet in April)
       2     SRI(NIC)      PDP-10       Server              John Melvin
      66     SRI(AI)       PDP-10       "Soon"              Len Chaiten
       3     UCSB          IBM-360/75   Server              Jim White
       4     UTAH          PDP-10       Server              Barry Wessler
      *5     BBN(NCC)      DDP-516      Never               Alex McKenzie
      69     BBN(TENEX-A)  PDP-10       Server              Dan Murphy
    *133     BBN(TENEX-B)  PDP-10       Server(Exper.)      Dan Murphy
    *158     BBN           TIP          User Only
                           (Prototype)
      6      MIT(Multics)  H-645        Server              Mike Padlipsky
      70     MIT(DM)       PDP-10       Server              Bob Bressler
    *134     MIT(AI)       PDP-10       User Now            Jeff Rubin
      *7     RAND          IBM-360/65   User only           Eric Harslem
      71     RAND          PDP-10       Server              Eric Harslem
      *8     SDC           IBM-370/155  Server              Bob Long
       9     HARVARD       PDP-10       Server              Bob Sundberg
     *73     HARVARD       PDP-1        User Only           Bob Sundberg
      10     LINCOLN       IBM-360/67   "Soon"              Joel Winett
      74     LINCOLN       TX-2         Server              Will Kantrowitz
      11     STANFORD      PDP-10       "Soon"              Andy Moorer
     *12     ILLINOIS      PDP-11       User Only           John Cravits
     *13     CASE          PDP-10       June                Charles Rose
      14     CARNEGIE      PDP-10       "Soon"              Hal VanZoeren
     *15     AMES/(PAOLI)  ILLIAC       September           John McConnell
                           (B6500)
      16     AMES          IBM-360/67   "Soon"              Wayne Hathaway
    *144     AMES          TIP          User Only
    *145     MITRE         TIP          User Only
     *19     NBS           PDP-11       User Only           Robert Rosenthal
    *147     NBS           TIP          User Only
    *148     ETAC          TIP          User Only

       _________________
       *Host not included in daily testing.

       #The NMC is a research site and would like to have prior arrangement
       with each user.

    Westheimer                                                      [Page 2]

    RFC 319                   Network Host Status                 March 1972

       SITE
        NO.    SITE                   DATE AND TIME (EASTERN)
       ----    ----                   -----------------------
                                     2/28  2/29   3/1   3/2   3/3
                                    1200  1330  1100  1320  1700
         1     UCLA-NMC               O     O    #D     O     0
        65     UCLA-CCN               O     O    #D     O     O
         2     SRI-ARC                O     O    #D     T     D
        66     SRI-AI                 D     D     D     D     D
         3     UCSB-MOD75             O     O     O     O     O
         4     UTAH-10                O     O    #D     O     O
        69     BBN-TENEX              O     O     O     O     O
       133     BBN-TENEXB            #D    #D     O    #D    #T
         6     MIT-Multics            O     O     O     O     O
        70     MIT-DMCG               O     H     D     O     O
        71     RAND-CSG               O     T     O     O     D
         8     SDC-ADEPT             #D    #D    #D    #D    #D
         9     HARVARD-10             O    #D     T     O     O
        10     L.L.-67                H     H     T     H     H
        74     L.L.-TX-2              O     O    #D     T     O
        11     SU-AI                  D     D     D     D     D
        14     CMU-10                 H     D     D     H     D
        16     AMES-67                D     D     D     D     D

       SITE
        NO.    SITE                   DATE AND TIME (EASTERN)
       ----    ----                   -----------------------
                                     3/6   3/7   3/8   3/9  3/10
                                    1530  1600  1430  1400  1700
         1     UCLA-NMC               O     O     O     O    #D
        65     UCLA-CCN               D     O     O     O     O
         2     SRI-ARC                O     O     H     D     O
        66     SRI-AI                 D     D     D     D     D
         3     UCSB-MOD75             O     O     O     O     O
         4     UTAH-10                O     O     O     O     O
        69     BBN-TENEX              D     O     O     O     O
       133     BBN-TENEXB            #D    #D    #D    #D    #D
         6     MIT-Multics            O     O     D     D     O
        70     MIT-DMCG               D     D     O     O     O
        71     RAND-CSG               D     D     O     O     O
         8     SDC-ADEPT             #D    #D    #D    #D     D
         9     HARVARD-10             O     O     O     O     O
        10     L.L.-67                H     D     H     H     H
        74     L.L.-TX-2              O     O    #D     O     O
        11     SU-AI                  D     D     D     D     D
        14     CMU-10                 D     D     D     D     D
        16     AMES-67                D     D     D     D     D

    Westheimer                                                      [Page 3]

    RFC 319                   Network Host Status                 March 1972

       where

          D = Dead (Destination Host either dead or inaccessible [due to
          network partitioning or local IMP failure] from the BBN Terminal
          IMP.)

          H = 1/2 Open (Destination Host opened a connection but then either
          immediately closed it, or did not respond any further.)

          O = Open (Destination Host opened a connection and was accessible
          to users.)

          R = Refused (Destination Host returned a CLS to the initial RFC.)

          T = Timed out (Destination Host did not complete the ICP and open
          a connection within 60 seconds.)

       The only service currently offered by the UCLA IBM-360/91 is a
       Network Job Service (NETRJS), however, the BBN Terminal IMP is not
       equipped to test NETRJS.  We are assuming that initial connection to
       the NETRJS logger indicates that NETRJS is also functioning.

          ____________
          #These sites advertise that they may not have their system
          available at these times.

            [This RFC was put into machine readable form for entry]
        [into the online RFC archives by Hilhne Morin, Viaginie, 12/99]

    Westheimer                                                      [Page 4]