RFC 267

Network Host Status

πŸ“… published November 1971, from ietf

RFC 267 πŸ’– Network Status, November 1971

Okay bestie, so this is RFC 267 from the Network Working Group πŸŽ€. Ellen Westheimer of BBN wrote it on 22 November 1971 (NIC #7815). It's filed under Categories: F, G.3. It updates RFC #266 ✨, and it obsoletes None, so nothing gets replaced here 🫢.

This RFC reports on the status of most Network Hosts from November 8 to November 19. On November 18, though, the BBN prototype Terminal IMP (Network Address 158) was inaccessible because of hardware debugging πŸ”§.

Who's Sitting Out Daily Testing 🌸

Several Hosts are currently excluded from the daily testing, and they fall into two groups πŸ’…:

  1. Hosts that aren't expected to be working on the Network as servers (available for use from other sites) for at least two weeks. These are:
Network
Address        Site             Computer

  71           Rand             PDP-10
  74           Lincoln          TX2
  13           Case             PDP-10
  14           Carnegie         PDP-10
  15           Ames             B6500
  16           Ames             IBM-360/67
  1. Hosts that are currently meant to be users only πŸ™ˆ. This group includes the Terminal IMPs that are presently on the Network (AMES, MITRE, and BBN*). It also includes the Network Control Center Computer (Network Address 5), which is used solely for gathering statistics from the Network. Finally, these Hosts are in here too:
Network
Address        Site             Computer

   7           Rand             IBM-360/65
  73           Harvard          PDP-1
  12           Illinois         PDP-11

During these two weeks, the Lincoln Labs TX2 Hosts became a Network User πŸŽ€. The SDC IBM 360/67 is now a server ✨.

The tables on the next two pages sum up the Host status for this period πŸ“‹.

  • The BBN Terminal IMP (Network Address 158) is a prototype, so it's frequently not connected to the Network. It's being used to refine and debug the Terminal IMP programs 🧚.

The Big Host Status Table πŸ’œ

NETWORK                            STATUS or            STATUS or
ADDRESS    SITE        COMPUTER    PREDUCTION           PREDUCTION
                                                        OBTAINED FROM

   1       UCLA        SIGMA-7     Server               Jon Postel
   5       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      "Soon"               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 Padlipsky
  70       MIT
             (DM)      PDP-10      Server               Bob Bressler
  *7       RAND        IBM-360/65  User only            Eric Harslem
 *71       RAND        PDP-10      January '72          Eric Harslem
   8       SDC         IBM-360/67  Server               Bob Long
   9       HARVARD     PDP-10      Server               Bob Sundberg
 *73       HARVARD     PDP-1       User only            Bob Sundberg
  20       LINCOLN     IBM-360/67  "Soon"               Joel Winnet
 *74       LINCOLN     TX2         December             Tom Barkalow
  11       STANFORD    PDP-10      "Soon"               Andy Moorer
 *12       ILLINOIS    PDP-11      User only            John Cravits
 *13       CASE        PDP-10      March '72            Charles Rose
 *14       CARNEGIE    PDP-10      January '72          Hal vanZoeren
 *15       AMES        B6500       September '72        John McConnel
 *16       AMES        IBM-360/67  January '72          Wayne Hathaway
*144       AMES        TIP         User only
*145       MITRE       TIP         User only
*158       BBN         TIP         User only
                  (Proto-type)

* host not included in daily testing.

The Daily Testing Grid πŸ“…

Here's the first week (November 8 to 12) 🌈:

NETWORK
ADDRESS   SITE       COMPUTER       DAY, DATE and TIME (Eastern)

                                   M      Tu       W       Th      F
                                 11/8    11/9    11/10   11/11   11/12

  1     UCLA         SIGMA-7       O       D       O       O       O
*65     UCLA         IBM-360/91    O       D       O       D       O
  2     SRI (NIC)    PDP-10        O       O       O       O       T
 66     SRI (AI)     PDP-10        D       D       D       D       D
  3     UCSB         IBM-360/75    O       T       O       O       D
  4     UTAH         PDP-10        D       D       H       D       D
 69     BBN (TENEX)  PDP-10        H       O       O       O       O
  6     MIT (Mulics) H-645         D       D       D       O       O
 70     MIT (DM)     PDP-10        O       H       T       D       O
  8     SDC          IBM-360/67   #D      #D      #D      #D      #D
  9     HARVARD      PDP-10        D       D       D       D       T
 10     LINCOLN      IBM-360/67    H       H       H       H       D
 11     STANFORD     PDP-10        D       T       D       D       D

And here's the second week (November 15 to 19) πŸ¦‹:

                                   M       Tu       W       F
                                 11/15   11/16    11/17   11/19

  1     UCLA         SIGMA-7       O       O       O       O
*65     UCLA         IBM-360/91    O       O       D       O
  2     SRI (NIC)    PDP-10        T       T       O       O
 66     SRI (AI)     PDP-10        D       D       D       D
  3     UCSB         IBM-360/75    O       O       O       O
  4     UTAH         PDP-10        D       D       D       D
 69     BBN (TENEX)  PDP-10        O       D       O       O
  6     MIT (Mulics) H-645         T       D       O       H
 70     MIT (DM)     PDP-10        O       O       O       D
  8     SDC          IBM-360/67   #D      #D      #D      #D
  9     HARVARD      PDP-10        T       D       D       T
 10     LINCOLN      IBM-360/67    D       H       D       D
 11     STANFORD     PDP-10        D       D       D       D

Decoder Ring πŸ”‘

Here's what each code in the grid means:

  • 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 further.)
  • O = Open (Destination Host opened a connection and was accessible to users.)
  • The UCLA IBM-360/91 currently has Remote Job Service (NETRJS), but it hasn't implemented a full server Telnet System. The BBN Terminal IMP isn't equipped to test NETRJS, so we're assuming that receiving the UCLA explanatory message means NETRJS is working too 🀞.

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

[ This RFC was put into machine readable form for entry ] [ into the online RFC archives by Simone Demmel 1/98 ] πŸ“Ό
πŸ“¦ where this page comes from