Network Working Group Ellen Westheimer
Request for Comments: #287 BBN
NIC: #8273 22 December 1971
Categories: F, G.3
Updates: RFC #267
Obsoletes: None
Status of Network Hosts
This RFC reports on the status of most Network Hosts from
December 6 to December 18. Due to hardware debugging, the BBN
prototype Terminal IMP (Network Address 158) was unavailable for most
of the two weeks from November 22 to December 6. There was, therefore,
no Host status reports for that period.
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
------- ---- --------
133 BBN PDP-10 (B)
71 Rand PDP-10
13 Case PDP-10
15 Ames/(Paoli) ILLIAC/(B6500)
16 Ames IBM-360/67
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 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 DAY, DATE AND TIME (EASTERN)
------- ---- -------- ----------------------------
M Tu W Th F
12/6 12/7 12/8 12/9 12/10
1300 1700 1300 1300 1630
1 UCLA SIGMA-7 D O O H T
*65 UCLA IBM-360/91 H H D H H
2 SRI (NIC) PDP-10 D T D D D
66 SRI (AI) PDP-10 D D D D D
3 UCSB IBM-360/75 O D O R D
4 UTAH PDP-10 T D D D T
69 BBN PDP-10 D D D D T
6 MIT (Multics) H-645 O O O T O
70 MIT (DM) PDP-10 O O D D O
8 SDC IBM-360/67 #D #D #D #D #D
9 HARVARD PDP-10 D T D O D
10 LINCOLN LAB IBM-360/67 D D D D H
74 LINCOLN LAB TX2 D D D D D
11 STANFORD PDP-10 D D D D D
14 CARNAGIE PDP-10 D D O D D
where
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.)
NETWORK
ADDRESS SITE COMPUTER DAY, DATE AND TIME (EASTERN)
------- ---- -------- ----------------------------
M Tu W Th F
12/13 12/14 12/15 12/16 12/17
1300 1700 1700 1600 1400
1000 1400 1400 1300 1100
1 UCLA SIGMA-7 D #D D O O
*65 UCLA IBM-360/91 O #D D O O
2 SRI (NIC) PDP-10 D D D T O
66 SRI (AI) PDP-10 D D D D D
3 UCSB IBM-360/75 T O D O D
4 UTAH PDP-10 D D D D D
69 BBN PDP-10 T H H O T
6 MIT (Multics) H-645 O H O D D
70 MIT (DM) PDP-10 D O D O O
8 SDC IBM-360/67 #D #D #D #D #D
9 HARVARD PDP-10 O D O D T
10 LINCOLN LAB IBM-360/67 H D H H H
74 LINCOLN LAB TX2 D D D H D
11 STANFORD PDP-10 D D D D D
14 CARNAGIE PDP-10 D D D D D
*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 NETJRS. We are assuming that initial connection to the NETRJS
logger indicates that NETJRS is also functioning.
# These sites advertise that they may not have their systems available
at these times.