Network Working Group Alex A. McKenzie Request for Comments: 638 BBN-NET NIC: 30538 April 25, 1974 IMP/TIP Preventive Maintenance Schedule This RFC corrects numerous inaccuracies in RFC #633. Rather than trying to list all the changes, I urge all Liaisons and other interested parties to look carefully at the times now listed for the sites they are interested in. 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 this is necessary we will follow the usual procedure for scheduling down time with our "primary contact" at the site. Permanent changes to the schedule will he announced via the RFC mechanism. PM's normally do not require the IMP/TIP to be taken down. However, machines must be taken down in some cases, so no one should rely on the machine remaining available through the PM period. PLEASE REMEMBER THAT TUESDAY MORNINGS FROM 7am TO 9am ARE RESERVED FOR NETWORK SOFTWARE MAINTENANCE. All times shown below are Eastern Time. First Monday (of each month) 5 BBN IMP [0830-1130] 40 NCC TIP [1130-1430] 47 WRIGHT-PATTERSON [1300-1700] First Tuesday 30 BBN TIP [0830-1130] 3 UCSB [1130-1430] McKenzie [Page 1] RFC 638 IMP/TIP Preventive Maintenance Schedule April 1974 First Wednesday 14 CARNEGIE [0830-1130] 2 SRI [1200-1500] First Thursday 26 SDAC [0830-1130] 4 UTAH [1030-1330] 41 NORSAR [0830-1130] 42 LONDON [0830-1130] Second Monday 6 MIT-MAC [0830-1130] 44 MIT-IPC [1200-1500] 25 DOCB [1030-1330] Second Tuesday 17 MITRE [0830-1130] 23 USC [1130-1430] Second Wednesday 31 CCA [0830-1130] 11 STANFORD [1200-1500] 32 XEROX [1400-1700] 18 RADC [0900-1200] Second Thursday 27 BELVOIR [0830-1130] 35 UCSD [1130-1430] 37 RML [0930-1230] McKenzie [Page 2] RFC 638 IMP/TIP Preventive Maintenance Schedule April 1974 Second Friday 43 TYMSHARE [1200-1500] Third Monday 9 HARVARD [0830-1130] 1 UCLA [1000-1300] 48 KIRTLAND [1600-1900] Third Tuesday 7 RAND [1130-1430] 8 SDC [1530-1830] Third Wednesday 12 ILLINOIS [0930-1230] 28 ARPA [1700-2000] 15 AMES IMP [1200-1500] 16 AMES TIP [1300-1600] 36 HAWAII [1430-1730] 45 MOFFETT [1400-1700] Third Thursday 20 ETAC [0830-1130] 33 FNWC [1300-1600] Third Friday 21 LLL [1230-1530] Fourth Monday 13 CASE [0830-1130] McKenzie [Page 3] RFC 638 IMP/TIP Preventive Maintenance Schedule April 1974 Fourth Tuesday 19 NBS [0830-1130] Fourth Wednesday 10 LINCOLN [0830-1130] 46 RUTGERS [1000-1400] Fourth Thursday 24 GWC [1500-1800] 22 ISI [1300-1600] 29 ABERDEEN [1300-1600] [ 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. 2/2000 ] McKenzie [Page 4]