Network Working Group Ellen Westheimer
NIC #10604 BBN
RFC #362 28 June 1972
Categories: F, G.3
Updates: RFC #353
Obsoletes: None
NETWORK HOST STATUS
This RFC reports on the status of most Network Hosts from June 5
to June 16. During this period the MIT Math Lab PDP-10 (Network
address 198) became a server.
No testing was done on June 6 due to an attempt to install the
new IMP system. No testing was done on June 9 as the prototype
Terminal IMP was being used for software debugging.
On June 16 the ARPA Terminal IMP (Network 156) was installed in
Arlington, Virginia.
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. The only Host in this category is the PDP-10 at Case
(Network address 13).
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, NOAA, RADC, SAAC, BELVOIR, ARPA, 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.
1 UCLA-NMC O O O O O #D O O
65 UCLA-CCN* O O O O O #D O O
2 SRI-ARC O D D O O O O O
66 SRI-AI O D T D D D #D D
3 UCSB-MOD75 O O O O O O O O
4 UTAH-10 0 O O D D O D O
69 BBN-TENEX D O O O O O O O
133 BBN-TENEXB #D #D #D #D #D #D #D #D
6 MIT-MULTICS O O O O O O O O
70 MIT-DMCG O O O O O O O O
134 MIT-AI H H H H H H H H
194 MIT-ML D D H D H H D H
71 RAND-CSG O D O D O O O O
8 SDC-ADEPT #D #D #D #D #D #D #D D
9 HARVARD-10 O O O O #D #D #D O
10 L.L.-360 H D H D H H H H
74 L.L.-TX-2 R #D O O O #D O O
11 STANFORD-AI D D O O O O D D
14 CMU-10 D O O O O T O O
15 AMES-ILLIAC T O O O D O O O
16 AMES-67 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.)
_______________
*The only service currently offered by the UCLA IBM-360/91 is a Network
Job Service (NETRJS), however, the BBN Terminal IMP is not equipped to
test NETRJS. We are assuming that initial connection to the NETRJS
logger indicates that NETRJS is also functioning.
#These sites advertise that they may not have their system available at
these times.