    Network Working Group                            Ellen Westheimer
    NIC #10421                                       BBN
    RFC #342                                         15 May 1972
    Categories:  F. G.3
    Updates:  RFC #332
    Obsoletes:  None

                              NETWORK HOST STATUS

            This RFC reports on the status of most Network Hosts from April
       24 to May 5.  During this interval the IBM 360/44 at the University
       of Southern California (Network Address 23) became a Network user.

            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

            2) Hosts which are currently intended to be users only.
       Included here are the Terminal IMPs, which are presently in the
       Network (AMES, MITRE, NBS, ETAC, USC, GWC, and BBN*).  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
                23               USC                 IBM-360/44

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

                                                                    [Page 1]

    SITE
     NO.    SITE                         DATE AND TIME (EASTERN)
    ----    ----                         -----------------------
                        4/24  4/25  4/26  4/27  4/28  5/1   5/2   5/3   5/4   5/5
                        1700  1600  1300  1430  1700  1300  1300  1700  1430  1430
      1    UCLA-NMC       O     O     D     O     O     O     O     O     O     O
     65    UCLA-CCN*      O     O     D     O     O     D     O     O     O     O
      2    SRI-ARC        O     O     O     O     O     O     T     D     O     O
     66    SRI-AI         D     D     D     D     D     O     D     D     D     D
      3    UCSB-MOD75     O     H     O     O     O     O     O     O     O     O
      4    UTAH -10       O     D     O     D     T     T     O     T     T     O
     69    BBN-TENEX      O     O     T     T     O     O     O     O     O     O
    133    BBN-TENEXB    #D    #D    #D    #D    #D    #D    #D    #D    #D     T
      6    MIT-MULTICS    R     D     O     O     O     O     D     O     D     O
     70    MIT-DMCG       O     O     F     F     O     F     O     O     O     F
     71    RAND-CSG       O     O     O     T     O    #O!    D     O     O     O
      8    SDC-ADEPT      D    #D    #D    #D     D    #D     D    #D     D    #D
      9    HARVARD-10     O     O     O     O     O     O     O     O    #D     D
     10    L.L.-360       D     D     D     H     H     D     D     H     D     D
     74    L.L-TX-2       O     T    #D     O     O     O     O    #D     O     O
     11    STANFORD-AI    D     D     D     D     D     D     D     T     D     D
     14    CMU-10         O     O     D     O     D     D     D     D     O     O
     15    AMES-ILLIAC    T     D     T     T     D     T     T     T     D     T
     16    AMES-67        D     D     D     D     D     D     D     D     D     D

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

    F = Full (Destination Host opened a connection, informed user that all
        Network ports were in use, and immediately closed the connection.

    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.
    !Rand opened a connection but requested users to logout immediately.

                                                                    [Page 2]

                                                               "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 June)
       2     SRI(NIC)     PDP-10       Server                  Jim White
      66     SRI(AI)      PDP-10       Server                  Len Chaiten
       3     UCSB         IBM-360/75   Server                  Ron Stoughton
       4     UTAH         PDP-10       Server                  Barry Wessler
      *5     BBN(NCC)     DDP-516      Never                   Alex McKenzie
      69     BBN(TENEXA)  PDP-10       Server                  Dan Murphy
     133     BBN(TENEXB)  PDP-10       Server(Exper.)          Dan Murphy
       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-370/65   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         ILLIAC       Server                  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
     *23     USC          IBM-360/44   User Now                James Pepin
    *151     USC          TIP          User Only
    *152     GWC          TIP          User Only
    *158     BBN          TIP          User Only
                          (Prototype)
    ________________
    *Host not included in daily testing.

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

                                                                    [Page 3]

           [ 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 4]