RFC252

Network Working Group E. Wentheimer Request for Comments: 252 Bolt, Beranek and Newman Category: F, G.3 8 October 1971 NIC: 7696

The purpose of this RFC is to report on the recent status of most Network Hosts. During September 27 through September 29 the BBN prototype Terminal IMP (Network Address 158) was inaccessible due to hardware debugging. The Network was, therefore, not examined on these days.

Three Hosts which were not officially able to act as Server's at the time of RFC #240 are now able to do so. These Hosts are:

     NETWORK          SITE              COMPUTER
     ADDRESS
     2                SRI (NIC)         PDF-10
     6                MIT (Multics)     H-645
     9                HARVARD           PDP-10

The Harvard PDP-10, however, has limited core space. They will, therefore, run the Telnet program only occasionally.

The following two tables summarize the information on the Host status for September 30 - October 8.

NETWORK SITE COMPUTER DAY, DATE AND TIME (Eastern) ADDRESS TH F M Tu W Th F

                         9/30  10/1  10/4  10/5  10/6  10/7  10/8
                         1100  1753  1200  1600  1100  1300  1530

1     UCLA     SIGMA-7     O     T     D      O   #D    O     O

• 65 UCLA IBM-360/91 O O D O D O O

2     SRI(NIC) PDP-10      O    #D     T     #T    O    T    #D
66    SRI(AI)  PDP-10      D     D     D     D     D    D     D
3     UCSB     IBM-360/75  D     O     O     O     O    O     O
4     UTAH     PDP-10      D     D     D     D     D    D     D
69    BBN(TENEX)  PDP-10   T     T     O     O     O    D     D
6     MIT(Multics)H-645    O     O     D     T     D    T     T
70    MIT(DM)     PDP-10   D     H     D     T     D    T     T
8     SDC         IBM-360  D     D     D     D     D    D     D
9     HARVARD     PDP-10   T     D     T     D     D    T     T
10    LINCOLN     IBM-360  H     H     H     H     D    T     D

where

  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 respond in any way to the
  initial RFC, although not dead.)

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

  0 = Opened (Destination Host opened a connection and was
  accessible to user.)

  * The UCLA IMB-360/91 currently has Remote Job Service (NETRJS),
    but has not implemented a full server Telnet System.  The BBN
    Terminal IMP is not equipped to test NETRJS however, we are
    assuming that receipt of the UCLA explanatory message indicates
    that NETRJS is also functioning.

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

NETWORK SITE COMPUTER STATUS or "STATUS or PREDICTIONS" ADDRESS PREDICTION OBTAINED FROM

 1      UCLA     SIGMA-7     Server            Jon Postel
 65     UCLA     IBM-360/91  Remote Job
                             Service now,
                             Telnet in April   Bob Braden
 2      SRI(NIC) PDP-10      Server            John Melvin
 66     SRI(AI)  PDP-10      November          Len Chaiten
 3      UCSB     IBM-360/75  Server            Jim White
 4      UTAH     PDP-10      "Soon"            Barry Wessler
 5      BBN(NCC) DDP-516     Never             Alex McKenzie
 69     BBN(TENEX)  PDP-10   Server            Dan Murphy
 6      MIT(Multics)H-645    Server            Mike Padliosky
 70     MIT(DM)  PDP-10      Server            Bob Bressler
 7      RAND     IBM 360/65  User only         Eric Harslem
 71     RAND     PDP-10      January           Eric Harslem
 8      SDC      IBM-360/67  "Soon"            Bob Long
 9      HARVARD  PDP-10      Server            Bob Sundberg
 73     HARVARD  PDP-1       User only         Bob Sundberg
 10     LINCOLN  IBM-360     "Soon"            Joel Winnet
 74     LINCOLN  TX2         Uncertain         Tom Barkalow
 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 VanZoeren
 15     PAOLI    B6500       Uncertain         John Cravits
 16     AMES     TIP         User only
 17     MITRE    TIP         User only
 18     BBN(TIP) Prototype TIP   User only

      [This RFC was put into machine readable form for entry]
 [into the online RFC archives by Kelly Tardif, Via Genie 10/1999]