RFC 376

Network Host Status

πŸ“… published August 1972, from ietf

RFC 376: NETWORK HOST STATUS πŸŽ€

Network Working Group πŸ’– Author: Ellen Westheimer (BBN) ✨ NIC #: 11118 🌸 RFC #: 376 πŸ¦‹ Date: 8 August 1972 πŸ“… Categories: F, G.3 πŸ’… Updates: RFC #370 πŸ”₯ Obsoletes: None πŸ™ˆ


NETWORK HOST STATUS 🌈

okay so this RFC is the host status report for basically every Network Host from July 31 to August 4. it's giving real-time network gossip 🧚

Several Hosts are currently excluded from the daily testing πŸ™ˆ because they're meant to be users only, no testing needed. The Terminal IMPs are still in the Network though, and they're the main ones here: AMES, MITRE, RADC, NBS, ETAC, USC, GWC, NOAA, SAAC, ARPA, and BBN*. πŸ’œ The Network Control Center computer (Network address 5) is also in this group. It's used only for gathering statistics from the Network, so it's the stats queen πŸ‘‘. And finally, these Hosts are included too:

    Network
    Address                  Site                 Computer
    -------                  ----                 --------
        7                    Rand                 IBM-360/65
       73                    Harvard              PDP-1
      138                    Lincoln              TSP
       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 πŸ“


NOTE πŸ’Œ

ngl this part is kind of sad 😭 Ellen Westheimer left BBN to go back to school on August 4, so the team is stopping these summaries πŸŽ€ Alex says UCLA-NMC is thinking about publishing similar survey data, and it'll be more detailed too! He's hoping that data replaces these reports 🫢 MIT-DMCG has also had survey info online for a while already (see RFC #308, NIC 9259), so there are options 🌸

                                                 - Alex McKenzie -
*The BBN Terminal IMP (Network Address 158) is a prototype πŸ§ͺ and as such is frequently not connected to the Network, because it's being used to refine and debug the Terminal IMP programs.

STATUS OR PREDICTIONS πŸ“Š

The big table, where each host gets its status or prediction and who gave us the info πŸ’…

                                                             STATUS OR
                                                             PREDICTIONS
ADDRESS  SITE           COMPUTER      STATUS OR PREDICTION   OBTAINED FROM
-------  ----           --------      --------------------   -------------
   1     UCLA           SIGMA-7       Sever #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 (TENEX-A)  PDP-10        Server                 Dan Murphy
 133     BBN (TENEX-B)  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        Server                 Jeff Rubin
 198     MIT (ML)       PDP-10        Server                 Jeff Rubin
  *7     RAND           IBM-360/65    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
*138     LINCOLN        TSP           User Only              Tom Barkelow
  11     STANFORD       PDP-10        Server                 Andy Moorer
  12     ILLINOIS       PDP-11        User Only              John Cravits
  13     CASE           PDP-10        July                   Charles Rose
  14     CARNEGIE       PDP-10        Server                 Hal VanZoeren
  15     AMES           ILLIAC        Server                 John McConnell
                        (PDP-10)
  16     AMES           IBM-360/67    "Soon"                 Wayne Hathaway
*144     AMES           TIP           User Only
*145     MITRE          TIP           User Only
*146     RADC           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
*153     NOAA           TIP           User Only
*154     SAAC           TIP           User Only
*156     ARPA           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 a prior arrangement with each user.


DAILY STATUS SUMMARY πŸ—“οΈ

And here's the day-by-day breakdown, with a letter for each host and each check time πŸ¦‹

NO.    SITE                            DATE AND TIME (EASTERN)
---    ----                            -----------------------
                                  7/31    8/1     8/2     8/3     8/4
                                  1400    1830    1330    1500    1330
  1    UCLA-NMC                     H       O       O       O       O
 65    UCLA-CNN*                    O       O       O       O       O
  2    SRI-ARC                      O       O       O       O       O
 66    SRI-AI                       D       D       O       T       O
  3    UCSB-MOD75                   O       O       O       O       O
  4    UTAH-10                      O       O       O       O       O
 69    BBN-TENEX                    O       T       T       O       R
133    BBN-TENEXB                  #D      #T      #T      #T      #D
  6    MIT-MULTICS                  O       T       O       O       O
 70    MIT-DMCG                     O       H       O       O       O
134    MIT-AI                       O       H       O       O       O
194    MIT-ML                       O       H       T       O       O
 71    RAND-CSG                     D       O       O       O       O
  8    SDC-ADEPT                   #D       D      #D      #D      #D
  9    HARVARD-10                   O       O       O       D       O
 10    L.L.-360                     H       T       H       H       R
 74    L.L.-TX-2                    O       O       O       R       O
 11    STANFORD-AI                  H       H       H       H       T
 13    CASE                         D       D       D       D       D
 14    CMU-10                       O       O       O       D       O
 15    AMES-ILLIAC                  D       T       D       D       D
 16    AMES-67                      D       H       D       D       D

THE CODES πŸ”‘

Here's the decoder ring for those letters πŸ’œ

  • D = Dead πŸ’€: the Destination Host is either dead or inaccessible from the BBN Terminal IMP, whether because of network partitioning or a local IMP failure.
  • F = Full πŸ™…β€β™€οΈ: the Destination Host opened a connection, told the user that all Network ports were in use, and immediately closed the connection.
  • H = 1/2 Open πŸŒ“: the Destination Host opened a connection but then either immediately closed it, or stopped responding.
  • O = Open ✨: the Destination Host opened a connection and was accessible to users.
  • R = Refused 🚫: the Destination Host returned a CLS to the initial RFC.
  • T = Timed out ⏰: the Destination Host didn't finish 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). The BBN Terminal IMP isn't equipped to test NETRJS, though, so we're assuming that a successful initial connection to the NETRJS logger means NETRJS is also functioning.

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


MACHINE READABLE NOTE πŸ€–

       [ This RFC was put into machine readable form for entry ]
       [ into the online RFC archives by BBN Corp. under the   ]
       [ direction of Alex McKenzie.                      1/97 ]

that's the whole thing, bestie πŸŒˆπŸ‘‘

πŸ“¦ where this page comes from