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]

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 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]

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 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]

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       [ into the online RFC archives by BBN Corp. under the   ]
       [ direction of Alex McKenzie.                   12/96   ]

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