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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
       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.
 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

Wnetheimer [Page 1] RFC 252 October 1971

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

Wnetheimer [Page 2] RFC 252 October 1971

 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]

Wnetheimer [Page 3]

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