RFC 235

SITE STATUS 💖

Quick title-block tea 🫖: this is RFC 235, from the Network Working Group, written by E. Westheimer at BBN (NIC 7652), dated September 27, 1971. It obsoletes nothing and updates nothing 🌸

Okay so starting with this RFC, BBN is gonna report on the status of most Network Hosts about once every two weeks 🦋 The info comes from chatting with people at each site, plus some "data" 👀 That data is the result of daily login attempts to every Host that might be reachable by a Network user. The attempts are made from the BBN prototype Terminal IMP at a random time each weekday ✨

Several Hosts are currently excluded from the daily testing 🙈 They fall into two categories:

1. Hosts that aren't expected to be working on the Network as servers (available for use from other sites) for at least a month. These include:

Network             Site              Computer
Address

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

2. Hosts that are currently meant to be users only 💅 This includes the Terminal IMPs in the Network right now (AMES, MITRE, and BBN*). It also covers the Network Control Center computer (Network Address 5), which is used only for gathering statistics from the Network. And lastly, these Hosts are in here too:

Network              Site               Computer
Address

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

The tables on the next two pages sum up Host status from September 13 through September 24 📅

• The BBN Terminal IMP (Network Address 158) is a prototype 🧪 That means it's often not connected to the Network, since it's being used to refine and debug the Terminal IMP programs.

WE/jm

The Big Status Table 🎀

NETWORK   SITE         COMPUTER    STATUS OR PREDICTION     CONTRACT
ADDRESS

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

The Daily Grid, Part One 📊

   NETWORK SITE       COMPUTER     DATE AND TIME (P.M.)
   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

The Daily Grid, Part Two 📊

   NETWORK SITE      COMPUTER     DATE AND TIME (P.M.)
   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

The Decoder Ring 🔑

Here's what all the symbols mean, bestie:

• D = Dead. The Destination Host is either dead or inaccessible, due to network partitioning or a local IMP failure from the BBN Terminal IMP 💀
• R = Refused. The Destination Host sent back a CLS to the initial RFC 🙅‍♀️
• T = Timed out. The Destination Host didn't respond in any way to the initial RFC, though it isn't dead 😭
• 1/2 0 = 1/2 Open. The Destination Host opened a connection, but then either immediately closed it or stopped responding 🫠
• 0 = Open. The Destination Host opened a connection and was accessible to users ✨

* The UCLA IBM-360 can currently only handle Remote Job Service 🎧 BBN isn't set up to test that, but it's assuming that getting their canned message means RJS is working too 💜

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