IMP/TIP preventive maintenance schedule
A monthly schedule for preventive maintenance on IMPs and TIPs.
McKenzie, A.M., "IMP/TIP preventive maintenance schedule", RFC 445, DOI 10.17487/RFC0445, January 1973, <https://www.rfc-editor.org/info/rfc445>.
@misc{rfc445,
series = {Request for Comments},
number = 445,
howpublished = {RFC 445},
publisher = {RFC Editor},
doi = {10.17487/RFC0445},
url = {https://www.rfc-editor.org/info/rfc445},
author = {A.M. McKenzie},
title = {{IMP/TIP preventive maintenance schedule}},
pagetotal = 2,
year = 1973,
month = jan,
} RFC text
Network Working Group Alexander A. McKenzie
RFC # 445 BBN-NET
NIC # 14028 January 22, 1973
IMP/TIP Preventive Maintenance Schedule
This note presents the current IMP/TIP Preventive Maintenance schedule.
Preventive Maintenance is scheduled on a monthly basis, and a given
machine is normally scheduled at the same time each month; wherever
possible the time is chosen to coincide with the PM time for the Host(s)
at the site.
It is sometimes necessary to reschedule PM's because of network
connectivity considerations or for other reasons. Whenever such
rescheduling occurs, we will announce the fact as soon as possible via
two mechanisms - the TIP NEWS and a Journal note (NOT an RFC) to
Technical Liaisons. Any permanent changes to the schedule will be
announced via the RFC mechanism.
All times show below are Eastern Time.
First Monday (of each month)
BBN IMP [0830-1130]
First Tuesday
BBN TIP [0830-1130]
UCSB [1130-1430]
First Wednesday
CARNEGIE [0830-1130]
SRI [1130-1430]
XEROX [1500-1800]
First Thursday
SAAC [0830-1130]
UTAH [1030-1330]
Second Monday
MIT [0830-1130]
NOAA [1030-1330]
Second Tuesday
MITRE [0830-1130]
USC [1130-1430]
Second Wednesday
CCA [0830-1130]
STANFORD [1130-1430]
RADC [1430-1730]
Second Thursday
BELVOIR [0830-1130]
UCSD [1130-1430]
PATRICK [0930-1230]
Third Monday
HARVARD [0830-1130]
UCLA [1000-1300]
Third Tuesday
RAND [1130-1430]
SDC [1530-1830]
Third Wednesday
ILLINOIS [0930-1230]
ARPA [0830-1130]
AMES IMP [1130-1430]
Third Thursday
ETAC [0830-1130]
FNWC [1130-1430]
Fourth Monday
CASE [0830-1130]
HAWAII [1330-1630]
Fourth Tuesday
NBS [0830-1130]
LBL [1130-1430]
Fourth Wednesday
LINCOLN [0830-1130]
AMES TIP [1130-1430]
Fourth Thursday
GWC [0930-1230]
ISI [1300-1600]
ABERDEEN [0830-1130]
[ This RFC was put into machine readable form for entry ]
[ into the online RFC archives by Alex McKenzie with ]
[ support from GTE, formerly BBN Corp. 9/99 ]
ISO Plain Language
On this page
§1A Monthly Maintenance Schedule
RFC 445 presents the current preventive maintenance schedule for network IMPs and TIPs. A machine is normally scheduled at the same time each month, and the schedule tries to match maintenance on hosts at the same site.
All listed times are Eastern Time. The schedule is grouped by week and weekday.
Network equipment has a planned maintenance window each month. The schedule tries to align it with host maintenance at the same site.
§2When a Schedule Changes
The RFC says maintenance may need to be rescheduled because of network connectivity or other reasons. Such changes would be announced as soon as possible through TIP NEWS and a Journal note to Technical Liaisons.
Permanent changes to the schedule would be announced through the RFC process.
Temporary changes would be announced through TIP NEWS and a Journal note. Permanent schedule changes would be announced in an RFC.
§3Maintenance Windows by Site
The list assigns sites and equipment to recurring windows such as the first Monday, second Wednesday, or fourth Thursday of each month. It includes separate entries for some sites' IMPs and TIPs.
The RFC presents the timetable as the current schedule, rather than specifying a maintenance protocol.
The table says which network machines are scheduled on each week and weekday. It is an operations notice, not a technical protocol.