Status of Network Hosts
RFC 287

Document Type RFC - Unknown (December 1971; No errata)
Obsoleted by RFC 288
Obsoletes RFC 267
Last updated 2013-03-02
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Network Working Group                                   Ellen Westheimer
Request for Comments: #287                                           BBN
NIC: #8273                                              22 December 1971
Categories: F, G.3
Updates: RFC #267
Obsoletes: None

                        Status of Network Hosts

     This RFC reports on the status of most Network Hosts from
December 6 to December 18.  Due to hardware debugging, the BBN
prototype Terminal IMP (Network Address 158) was unavailable for most
of the two weeks from November 22 to December 6. There was, therefore,
no Host status reports for that 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:

   Address              Site                Computer
   -------              ----                --------

     133                BBN                 PDP-10 (B)
      71                Rand                PDP-10
      13                Case                PDP-10
      15                Ames/(Paoli)        ILLIAC/(B6500)
      16                Ames                IBM-360/67

   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 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:

                                                                [Page 1]
   Address              Site                Computer
   -------              ----                --------

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

     The NBS Terminal IMP (Network Address 147) was installed in
Washington at the beginning of December.

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

* 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 2]
------- ----          --------           ----------------------------
                                      M      Tu       W      Th       F
                                    12/6    12/7    12/8    12/9    12/10
                                    1300    1700    1300    1300    1630

   1    UCLA          SIGMA-7         D       O       O       H       T

 *65    UCLA          IBM-360/91      H       H       D       H       H

   2    SRI (NIC)     PDP-10          D       T       D       D       D

  66    SRI (AI)      PDP-10          D       D       D       D       D

   3    UCSB          IBM-360/75      O       D       O       R       D

   4    UTAH          PDP-10          T       D       D       D       T

  69    BBN           PDP-10          D       D       D       D       T

   6    MIT (Multics) H-645           O       O       O       T       O

  70    MIT (DM)      PDP-10          O       O       D       D       O

   8    SDC           IBM-360/67     #D      #D      #D      #D      #D

   9    HARVARD       PDP-10          D       T       D       O       D

  10    LINCOLN LAB   IBM-360/67      D       D       D       D       H

  74    LINCOLN LAB   TX2             D       D       D       D       D

  11    STANFORD      PDP-10          D       D       D       D       D

  14    CARNAGIE      PDP-10          D       D       O       D       D

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
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.)

                                                                [Page 3]
------- ----          --------           ----------------------------
                                      M      Tu       W      Th       F
                                    12/13   12/14   12/15   12/16   12/17
                                    1300    1700    1700    1600    1400
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