RFC 306

RFC 306: Network Host Status ✨

Paperwork first, bestie 📋: this is RFC 306, written by E. Westheimer of BBN (NIC 9257) and dated February 15, 1972. It obsoletes: None, so it doesn't replace anything 🌸. The header doesn't list a category or an Updates field, so I'm not making one up 💅.

The Vibe Check

Okay so this RFC spills the tea on how most Network Hosts were doing from January 31 to February 11 🍓. Several Hosts are currently excluded from the daily testing, and they fall into two categories 🧚.

1. Hosts that aren't expected to be working as servers (available for use from other sites) on a regular basis for at least two weeks 😭. Here are the ones in this group:

NETWORK              SITE                COMPUTER
ADDRESS

133                  BBN                 PDP-10  (B)
13                   Case                PDP-10
15                   Ames/(Paoli)        ILLIAC/(B6500)

2. Hosts that are currently meant to be users only 🫶. This group includes the Terminal IMPs that are in the Network right now (AMES, MITRE, NBS and BBN*). It also includes the Network Control Center computer (Network Address 5), which only exists to gather statistics from the Network. And the rest of the group looks like this:

NETWORK              SITE                COMPUTER
ADDRESS

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

The tables on the next two pages summarize the Host status for this period 👑.

The Status Table

Here's the full host status rundown 🔥:

                                                           "STATUS OR
   SITE     SITE         COMPUTER      STATUS OR           PREDICTIONS"
   ADDRESS                             PREDICTION          OBTAINED FROM

      1     UCLA         SIGMA-7       Server # Limited   Jon Postel
     65     UCLA         IBM-360/91    NETRJS now         Bob Braden
                                       (Telnet in April)
      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        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
     *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 Winnet
     74     LINCOLN      TX-2          Server             Will Kantrowitz
     11     STANFORD     PDP-10        SOON               Andy Moorer
    *12     ILLINOIS     PDP-11        User only          John Cravits
    *13     CASE         PDP-10        March              Charles Rose
     14     CARNEGIE     PDP-10        SOON               Hal VanZoeren
     15     AMES/(PAOLI) ILLIAC        September          John McConnell
                           (B6500)
     16     AMES         IBM-360/67    SOON               Wayne Hathaway
   *144     AMES         TIP           User only
   *145     MITRE        TIP           User only
    *19     NBS          PDP-11        User only          Robert Rosenthal
   *147     NBS          TIP           User only
   *158     BBN          TIP           User only
                         (Prototype)

Quick decoder ring 💖: a * means the Host isn't in daily testing. The Terminal IMP at 158 is the BBN prototype from the footnote above.

Footnote marked #: The NMC is a research site and would like to have prior arrangement with each user 🌈.

The Connectivity Grid

Now the big one 🦋. This shows how each site was doing across the testing windows:

SITE     SITE                         DATE AND TIME (EASTERN)
NO.                1/31  2/1  2/2  2/3  2/4  2/7  2/8  2/9  2/10  2/11
                    1430 1530 1430 1630 1530 1830 1500 1730  1000 1230

1    UCLA-NMC       H     O    O    O    O    O    O    O     O    #D
65   UCLA-CCN       O     O    O    O    D    O    O    O     D    #D
2    SRI-ARC        O     O    D    O    O    O    O    T     H    O
66   SRI-AI         D     D    D    D    D    D    D    D     D    D
3    UCSB-MOD75     O     O    H    O    H    D    O    O     O    O
4    UTAH-10        D     O    T    O    D    D    D    O     D    D
69   BBN-TENEX      T     O    O    O    O    D    O    O     O    O
6    MIT-Multics    O     O    D    O    O    D    R    D     O    O
     MIT-DMCG       H     D    D    D    D    D    H    D     O    O
71   RAND-CSG       T     T    T    D    D    D    D    D     T    T
8    SDC-ADEPT      #D    #D   #D   #D   #D   D    #D   D     #D   #D
9    HARVARD        O     O    O    O    #D   #T   O    O     D    #D
10   L.L.-67        T     H    H    D    H    D    H    H     H    H
74   L.L.-TX-2      D     D    D    T    T    #D   O    #D    D    #T
11   SU-AI          D     D    D    D    D    D    D    D     D    D
14   CMU-10         D     H    H    H    H    D    D    D     D    H
16   AMES-67        D     D    D    D    D    D    D    D     D    D

Here's what the letters mean 🔮:

• D = Dead. The Destination Host is either dead or can't be reached from the BBN Terminal IMP, because of network partitioning or a local IMP failure.
• H = Half Open. The Destination Host opened a connection, then either closed it right away or stopped responding.
• O = Open. The Destination Host opened a connection and was accessible to users. Slay 💅.
• R = Refused. The Destination Host sent back a CLS to the initial RFC.
• T = Time out. The Destination Host didn't finish the ICP and open a connection within 60 seconds.

Last Notes

Footnote marked *: The only service the UCLA IBM-360/91 offers right now is Network Job Service (NETRJS). The BBN Terminal IMP isn't set up to test NETRJS, though, so we're assuming that a successful initial connection to the NETRJS logger means NETRJS is working too 🧚‍♀️.

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

This document was put into machine readable form for entry into the online RFC archives by Hélène Morin, Viagénie 10/99 🎀:

[This RFC was put into machine readable form for entry]
[into the online RFC archives by H�l�ne Morin, Viag�nie 10/99]