RFC 315

NETWORK HOST STATUS 🌸

📄 RFC 315 from the Network Working Group, written by Ellen Westheimer at BBN 🎀 It's NIC 9345, dated March 8, 1972, and it Updates: 306 (RFC 306) 💅

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The Vibe Check 🦋

Okay so this RFC is a status report on most of the Network Hosts from February 14 to February 25. It's giving snapshot of the whole network that week 📸 Also, on February 21, Massachusetts celebrated Washington's Birthday 🇺🇸 And during those two weeks, the MIT Artificial Intelligence (MIT-AI) PDP-10, Network address 134, became a Network User 🎉 Iconic glow-up.

Several Hosts are currently excluded from the daily testing 🙈 They're sorted into two groups:

1. Hosts that aren't expected to be working as servers (aka available for other sites to use) on a regular basis for at least two weeks ⏳ Here's the list:

Network
Address          Site            Computer
-------          ----            --------
134              MIT-AI          PDP-10
 13              Case            PDP-10
 15              Ames/(Paoli)    ILLIAC/(B6500)

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

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

The tables on the next two pages sum up the Host status for this period 💖

*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 🛠️

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The Big Status Table 💅

Here's the full tea on each Host's status or predictions, and who gave us the info 🍓

                                                          "STATUS OR
 SITE                                                     PREDICTIONS"
 ADDRESS  SITE          COMPUTER    STATUS OR 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
 *134     MIT(AI)       PDP-10      User Now             Jeff Rubin
   *7     RAND          IBM-360/65  User only            Eric Harslem
   71     RAND          PDP-10      Server               Eric Harslem
   *8     SDC           IBM-370/15  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
   11     STANFORD      PDP-10      "Soon"               Andy Moorer
  *12     ILLINOIS      PDP-11      User Only            John Cravits
  *13     CASE          PDP-10      June                 Charles Rose
   14     CANERGIE      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)

*Host not included in daily testing.

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

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The Day-by-Day Grid 🗓️

Here's the daily schedule of who's up and who's down ✨

 SITE
  NO.  SITE               DATE AND TIME (EASTERN)
 ----  ----               -----------------------
                  2/14  2/15  2/16  2/17  2/18  2/22  2/23  2/24  2/25
                  1830  1030  1730  1600  1200  1030  1500  1100  1500
   1   UCLA-NMC     O     O     O     O     0     O     D    #D     O
  65   UCLA-CCN     O     D     O     O     D     D     O     O     O
   2   SRI-ARC      O     O     O     O     D     O     O     O     O
  66   SRI-AI       D     D     D     D     D     D     D     D     D
   3   UCSB-MOD75   D    #D     O     O     O    #D     O     O     O
   4   UTAH-10      O     D     O     O     O     D     O     O     O
  69   BBN-TENEX    O     O     O     O     T     T     O     O     O
 133   BBN-TENEXB  #D    #D    #D    #D    #D    #D    #D    #D    #D
   6   MIT-Multic   O     O     T     T     O     D     D     D     D
  70   MIT-DMCG     O     O     O     D     T     O     H     O     D
  71   RAND-CSG     T     T     O     T     O     H     D     O     O
   8   SDC-ADEPT   #D    #D     H    #D    #D    #D    #D    #D    #D
   9   HARVARD-10  #D     D    #D     O     O     D    #D    #D    #D
  10   L.L.-67      H     D     H     H     H     H     H     H     H
  74   L.L.-TX-2   #T     O    #D     O     O     O    #D     O     O
  11   SU-AI        D     D     D     D     D     D     D     D     D
  14   CMU-10       D     D     H     D     H     H     H     D     D
  16   AMES-67      D     D     D     D     D     D     D     D     D

Here's what the codes mean 🔑

• D = Dead (Destination Host either dead or inaccessible [due to network partitioning or local IMP failure] from the BBN Terminal IMP.) 💀
• H = 1/2 Open (Destination Host opened a connection but then either immediately closed it, or did not respond any further.) 🙃
• O = Open (Destination Host opened a connection and was accessible to users.) ✨
• R = Refused (Destination Host returned a CLS to the initial RFC.) 🚫
• T = Timed out (Destination Host did not complete 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 an initial connection to the NETRJS logger means NETRJS is working too 🤞

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

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📼 [This RFC was put into machine readable form for entry] [into the online RFC archives by H�l�ne Morin, Viag�nie, 12/99]