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Network Working Group Ellen Westheimer
NIC #10421 BBN
RFC #342 15 May 1972
Categories: F. G.3
Updates: RFC #332
Obsoletes: None
NETWORK HOST STATUS
This RFC reports on the status of most Network Hosts from April
24 to May 5. During this interval the IBM 360/44 at the University
of Southern California (Network Address 23) became a Network user.
Several Hosts are currently excluded from the daily testing.
These Hosts fall into two categories:
1) Hosts which are not expected to be functioning on the Network
as servers (available for use from other sites) on a regular basis
for at least two weeks. Included here are:
Network
Address Site Computer
------- ---- --------
134 MIT-AI PDP-10
13 Case PDP-10
2) Hosts which are currently intended to be users only.
Included here are the Terminal IMPs, which are presently in the
Network (AMES, MITRE, NBS, ETAC, USC, GWC, and BBN*). This category
also includes the Network Control Center computer (Network Address 5)
which is used solely for gathering statistics from the Network.
Finally, included among these Hosts are the following:
Network
Address Site Computer
------- ---- --------
7 Rand IBM-360/65
73 Harvard PDP-1
12 Illinois PDP-11
19 NBS PDP-11
23 USC IBM-360/44
The tables on the next two pages summarize the Host status for
this period.
_____________
*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.
[Page 1]
SITE
NO. SITE DATE AND TIME (EASTERN)
---- ---- -----------------------
4/24 4/25 4/26 4/27 4/28 5/1 5/2 5/3 5/4 5/5
1700 1600 1300 1430 1700 1300 1300 1700 1430 1430
1 UCLA-NMC O O D O O O O O O O
65 UCLA-CCN* O O D O O D O O O O
2 SRI-ARC O O O O O O T D O O
66 SRI-AI D D D D D O D D D D
3 UCSB-MOD75 O H O O O O O O O O
4 UTAH -10 O D O D T T O T T O
69 BBN-TENEX O O T T O O O O O O
133 BBN-TENEXB #D #D #D #D #D #D #D #D #D T
6 MIT-MULTICS R D O O O O D O D O
70 MIT-DMCG O O F F O F O O O F
71 RAND-CSG O O O T O #O! D O O O
8 SDC-ADEPT D #D #D #D D #D D #D D #D
9 HARVARD-10 O O O O O O O O #D D
10 L.L.-360 D D D H H D D H D D
74 L.L-TX-2 O T #D O O O O #D O O
11 STANFORD-AI D D D D D D D T D D
14 CMU-10 O O D O D D D D O O
15 AMES-ILLIAC T D T T D T T T D T
16 AMES-67 D D D D D D D D D D
where
D = Dead (Destination Host either dead or inaccessible [due to network
partitioning or local IMP failure] from the BBN Terminal IMP.)
F = Full (Destination Host opened a connection, informed user that all
Network ports were in use, and immediately closed the connection.
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.)
____________