Network Working Group
Request for Comments: 235
NIC: 7652
Obsoletes: None
Updates: None
E. Westheimer
September 27, 1971


Beginning with this RFC, BBN will report on the status of most Network Hosts approximately once every two weeks. The information for these reports will be gained from talking to people at each site, and from experimental "data". These data will be the results of daily attempts to log into each of the Hosts which might be accessible to a Network user; the attempts will have been made from the BBN prototype Terminal IMP at a random time each weekday.

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) for at least a month. Included here are:

            Network             Site              Computer
             71                 Rand              PDP-10
             74                 Lincoln           TX2
             11                 Stanford          PDP-10
             13                 Case              PDP-10
             14                 Carnegie          PDP-10
             15                 Paoli             B6500

2) Hosts which are currently intended to be users only. Included here are the Terminal IMPs presently in the Network (AMES, MITRE, 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              Site               Computer

7 Rand IBM-360

73 Harvard PDP-1

12 Illinois PDP-11

The tables on the next two pages condense the information on Host status for September 13 through September 24.

* 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.




1        UCLA          SIGMA-7   Server                   John Postel
65       UCLA          IBM-360   Remote Job Service now,
                                 Time-sharing in January  Steve Wolf
2        SRI(NIC)      PDP-10    October11                John Melvin
66       SRI(AI)       PDP-10    November                 Len Chaiten
3        UCSB          IBM-360   Server                   Jim White
4        UTAH          PDP-10    soon                     Barry Wessler
5        BBN           DDP-516   NCC                      Alex McKenzie
69       BBN           PDP-10    Server                   Dan Murphy
6        MIT(Multics)  H-465     Soon                     Mike Padlipsky
70       MIT(DM)       PDP-10    Server                   Bob Bressler
7        RAND          IBM-360   User only                Eric Harslem
71       RAND          PDP-10    January                  Eric Harslem
8        SDC           IBM-360   October 11               Bob Long
9        HARVARD       PDP-10    Soon                     Bob Sundberg
73       HARVARD       PDP-1     User only                Bob Sundberg
10       LINCOLN       IBM-360   Soon                     Joel Winnet
74       LINCOLN       TX2       Uncertain                Tom Barklow
11       STANFORD      PDP-10    November                 Andy Moorer
12       ILLINOIS      PDP-11    User only                John Cravits
13       CASE          PDP-10    December 15              Charles Rose
14       CARNEGIE      PDP-10    January                  Hal Van Zoeren
15       PAOLI         B6500     Uncertain                John Cravits
16       AMES          DDP-316   Terminal IMP             Does not apply
17       MITRE         DDP-316   Terminal IMP             Does not apply
30       BBN           DDP-316   Terminal IMP(Prototype)  Does not apply

   ADDRESS                        9/13  9/14  9/15  9/16   9/17
                                  4:30  3:30  6:00  10:30  1:30
   1     UCLA         SIGMA 7        0     0     0      D     D
   *65   UCLA         PDP-10         0     0     0      0     0
   2     SRI(NIC)     PDP-10         D     D     D      D     D
   66    SRI(AI)      PDP-10         D     D     D      D     D
   3     UCSB         IBM-360        0     0     0      0     0
   4     UTAH         PDP-10         D     D     D      D     D
   69    BBN          PDP-10         0   1/2 0   0      T   1/2 0
   6     MIT(Multics) DDP-645        R     R     R      D   1/2 0
   70    MIT(DM)      PDP-10         T     T     T      O     0
   8     SDC          IBM-360        D     D     D      D     T
   9     HARVARD      PDP-10         T     D     T      T     T
   10    LINCOLN      IBM-360        D    1/2 0 1/2 0   D     T

   ADDRESS                        9/20   9/21  9/22  9/23  9/24
                                  12:30  4:30  3:30  2:00  5:00
   1     UCLA         SIGMA  7        D     0     D     T     0
   *65   UCLA         PDP-10          D     0     0     0     0
   2     SRI(NIC)     PDP-10          D     D     0     D     D
   66    SRI(AI)      PDP-10          D     D     D     D     D
   3     UCSB         IBM-360         0     0     0     0     0
   4     UTAH         PDP-10          D     D     D     D     D
   69    BBN          PDP-10          0   1/2 0   0   1/2 0   0
   6     MIT(Multics) DDP-645         D   1/2 0   T     T     R
   70    MIT(DM)      PDP-10          T   1/2 0   0     D     TD
   8     SDC          IBM-360         D     D     D     D     D
   9     HARVARD      PDP-10          T     D     T     D     D
   10    LINCOLN      IBM-360         D     D     D   1/2 0   D


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

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

T = Timed out. (Destination Host did not responding any way to the initial RFC, although not dead.)

1/2 0 = 1/2 Open. (Destination Host opened a connection but then either immediately closed it, or did not respond any further.)

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

* The UCLA IBM-360 is at the moment only able to handle Remote Job Service. BBN is not equipped to test this, but is assuming that receipt of their canned message indicates that RJS is also functioning.

        [This RFC was put into machine readable form for entry]
     [into the online RFC archives by Kelly Tardif, Viagénie 10/99]