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Networking Group Request for Comments: 240 NIC #7665 Categories: F, G.3 Updates: none Obsoletes: RFC 235

A. McKenzie BBN 30 September 1971 Rand 50ctu

SITE STATUS Due to extensive typographic errors in RFC #235, I have decided to reissue the first of our experimental site status reports. In compiling RFC #235, I followed the principle that timeliness was somewhat more important than extremely careful editing; this seemed to me to be in keeping with the original RFC philosophy. I am sorry for any embarrassment this may have caused to anyone associated with the Network, and accept full responsibility for the content of RFC #235. I will try to do a better job in the future.

Alex McKenzie

SITE STATUS

Beginning with this RFC, BBN will report on the status of most Network Hosts approximately once every two weeks. The information for these reports will be gained from talking to people at each site, and from experimental "data". These data will be the results of daily attempts to log into each of the Hosts which might be accessible to a Network user; the attempts will have been made from the BBN prototype Terminal IMP at a random time each weekday. Several Hosts are currently excluded from the daily testing. These Hosts fall into two categories: 1) Hosts which are note expected to be functioning on the Network as servers (available for use from other sites) for at least a month. Included here are: Network Address 71 74 11 Site Computer

Rand Lincoln Stanford

PDP-10 TX2 PDP-10

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RFC #240

13 14 15 2)

Case Carnegie Paoli

PDP-10 PDP-10 B6500

Hosts which are currently intended to be users only. Included here are the Terminal IMPs presently in the Network (AMES, MITRE, and BBN[1]). This category also includes the Network Control Center computer (Network Address 5) which is use solely for gathering statistics from the Network. Finally, included among these Hosts are the following: Network Address 7 73 12 Site Computer

Rand Harvard Illinois

IBM-360/65 PDP-1 PDP-11

The tables on the next two pages condense the information on Host status for September 13 through September 24. PREDICTIONS OBTAINED FROM Jon Postel Steve Wolf John Melvin Len Chaiten Jim White Barry Wessler Alex McKenzie Dan Murphy Mike Padlipsky Bob Bressler Eric Harslem Eric Harslem Bob Long Bob Sundberg Bob Sundberg Joel Winnet Tom Barkalow Andy Moorer John Cravits Charles Rose Hal VanZoeren John Cravits

NETWORK SITE ADDRESS 1 65 2 66 3 4 5 69 6 70 7 71 8 9 73 10 74 11 12 13 14 15 UCLA UCLA

COMPUTER

STATUS or PREDICTION

SIGMA - 7 Server IBM-360/91 Remote Job Service now, Time-sharing in January SRI(NIC) PDP-10 October 11 SRI(AI) PDP-10 November UCSB IBM-360-75 Server UTAH PDP-10 "Soon" BBN DDP-516 NCC BBN PDP-10 Server MIT(Multics) H-645 "Soon" MIT(DM) PDP-10 Server RAND IBM 360/65 User only RAND PDP-10 January SDC IBM-360/67 October 11 HARVARD PDP-10 "Soon" HARVARD PDP-1 User only LINCOLN IBM-360/67 "Soon" LINCOLN TX2 Uncertain STANFORD PDP-10 November ILLINOIS PDP-11 User only CASE PDP-10 December 15 CARNEGIE PDP-10 January PAOLI B6500 Uncertain

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16 17 30

AMES MITRE BBN

TIP TIP TIP

Installed Installed Prototype

NETWORK ADDRESS 1 65[2] 2 66 3 4 69 6 70 8 9 10

SITE

COMPUTER

UCLA SIGMA-7 UCLA IBM 360/91 SRI(NIC) PDP-10 SRI(AI) PDP-10 UCSB IBM-360/75 UTAH PDP-10 BBN PDP-10 MIT(Multics) H-645 MIT(DM) PDP-10 SDC IBM-360/67 HARVARD PDP-10 LINCOLN IBM-360/67

DATE AND TIME (P.M.) 9/13 9/14 9/15 9/16 9/17 9/20 4:30 3:30 6:00 10:30 1:30 12:30 O O O D D D O O O O O D D D D D D D D D D D D D O O O O O O D D D D D D O 1/2 0 O T 1/2 O O R R R D 1/2 O D T T T O O T D D D D T D T D T T T T D 1/2 0 1/2 0 D T D

NETWORK ADDRESS

SITE

COMPUTER

DATE AND TIME (P.M.) 9/21 9/22 9/23 9/24 4:30 3:30 2:00 5:00 O O D D O D O R D D D D

1 65[2] 2 66 3 4 69 6 70 8 9 10

UCLA SIGMA-7 O D T UCLA IBM 360/91 O O O SRI(NIC) PDP-10 D O D SRI(AI) PDP-10 D D D UCSB IBM-360/75 O O O UTAH PDP-10 D D D BBN PDP-10 O 1/2 O O MIT(Multics) H-645 1/2 O T T MIT(DM) PDP-10 1/2 O O D SDC IBM-360/67 D D D HARVARD PDP-10 D T D LINCOLN IBM-360/67 D D 1/2 0

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where D = Dead.

(Destination Host either dead orinaccessible (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.) 1/2 0 = 1/2 Open. (Destination Host opened a connection but then either immediately close it, or did not respond any further.) O = Open. (Destination Host opened a connection and was accessible to users.)

Endnotes [1] The BBN Terminal IMP (Network Address 158) is a prototype, and as such is frequently not connected to the Network, but being used to refine and debug the Terminal IMP programs. [2] The UCLA IBM-360 is at the moment only able to handle Remote Job Service. BBN is not equipped to test this, but is assuming that receipt of their canned message indicates that RJS is also functioning.

[ This RFC was put into machine readable form for entry ] [ into the online RFC archives by Roy Zimmer 9/97 ]

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