Using the Simple Network Time Protocol
ExtremeWare XOS 11.3 Concepts Guide
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NTP updates are distributed using GMT time. To properly display the local time in logs and other time-
stamp information, the switch should be configured with the appropriate offset to GMT based on
geographical location. Table 15 lists GMT offsets.
Table 15: Greenwich Mean Time offsets
GMT
Offset in
Hours
GMT Offset
in Minutes
Common Time Zone References Cities
+0:00 +0 GMT - Greenwich Mean
UT or UTC - Universal (Coordinated)
WET - Western European
London, England; Dublin, Ireland;
Edinburgh, Scotland; Lisbon, Portugal;
Reykjavik, Iceland; Casablanca, Morocco
-1:00 -60 WAT - West Africa Cape Verde Islands
-2:00 -120 AT - Azores Azores
-3:00 -180 Brasilia, Brazil; Buenos Aires, Argentina;
Georgetown, Guyana
-4:00 -240 AST - Atlantic Standard Caracas; La Paz
-5:00 -300 EST - Eastern Standard Bogota, Columbia; Lima, Peru; New York,
NY, Trevor City, MI USA
-6:00 -360 CST - Central Standard Mexico City, Mexico
-7:00 -420 MST - Mountain Standard Saskatchewan, Canada
-8:00 -480 PST - Pacific Standard Los Angeles, CA, Santa Clara, CA,
Seattle, WA USA
-9:00 -540 YST - Yukon Standard
-10:00 -600 AHST - Alaska-Hawaii Standard
CAT - Central Alaska
HST - Hawaii Standard
-11:00 -660 NT - Nome
-12:00 -720 IDLW - International Date Line West
+1:00 +60 CET - Central European
FWT - French Winter
MET - Middle European
MEWT - Middle European Winter
SWT - Swedish Winter
Paris France; Berlin, Germany;
Amsterdam, The Netherlands; Brussels,
Belgium; Vienna, Austria; Madrid, Spain;
Rome, Italy; Bern, Switzerland;
Stockholm, Sweden; Oslo, Norway
+ 2:00 +120 EET - Eastern European, Russia Zone 1 Athens, Greece; Helsinki, Finland;
Istanbul, Turkey; Jerusalem, Israel;
Harare, Zimbabwe
+3:00 +180 BT - Baghdad, Russia Zone 2 Kuwait; Nairobi, Kenya; Riyadh, Saudi
Arabia; Moscow, Russia; Tehran, Iran
+4:00 +240 ZP4 - Russia Zone 3 Abu Dhabi, UAE; Muscat; Tblisi;
Volgograd; Kabul
+5:00 +300 ZP5 - Russia Zone 4
+5:30 +330 IST - India Standard Time New Delhi, Pune, Allahabad, India
+6:00 +360 ZP6 - Russia Zone 5
+7:00 +420 WAST - West Australian Standard
+8:00 +480 CCT - China Coast, Russia Zone 7
+9:00 +540 JST - Japan Standard, Russia Zone 8