configure timezone
ExtremeWare 7.7 Command Reference Guide
97
Usage Guidelines
Network Time Protocol (NTP) server updates are distributed using GMT time. To properly display the
local time in logs and other timestamp information, the switch should be configured with the
appropriate offset to GMT based on geographic location.
The
gmt_offset
is specified in +/- minutes from the GMT time.
Automatic DST changes can be enabled or disabled. The default configuration, where DST begins on the
first Sunday in April at 2:00 AM and ends the last Sunday in October at 2:00 AM, applies to most of
North America, and can be configured with the following syntax:
configure timezone <gmt_offst> autodst
.
As of ExtremeWare 6.2.1, the starting and ending date and time for DST may be specified, as these vary
in time zones around the world.
•
Use the
every
keyword to specify a year-after-year repeating set of dates (e.g. the last Sunday in
March every year)
•
Use the
on
keyword to specify a non-repeating, specific date for the specified year. If you use this
option, you will need to specify the command again every year.
•
The
begins
specification defaults to
every
first sunday april
.
•
The
ends
specification defaults to
every
last sunday october
.
•
The
ends
date may occur earlier in the year than the
begins
date. This will be the case for countries
in the Southern Hemisphere.
•
If you specify only the starting or ending time (not both) the one you leave unspecified will be reset
to its default.
•
The
time_of_day
specification defaults to
2:00
•
The timezone IDs are optional. They are used only in the display of timezone configuration
information in the
show switch
command.
To disable automatic DST changes, re-specify the GMT offset using the
noautodst
option:
configure timezone <gmt_offst> noautodst.
NTP updates are distributed using GMT time. To properly display the local time in logs and other
timestamp information, the switch should be configured with the appropriate offset to GMT based on
geographical location. Table 5 describes the GMT offsets.
Table 5: 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
Azores, Cape Verde Islands
-2:00
-120
AT - Azores
-3:00
-180
Brasilia, Brazil; Buenos Aires, Argentina;
Georgetown, Guyana;
-4:00
-240
AST - Atlantic Standard
Caracas; La Paz
Summary of Contents for ExtremeWare 7.7
Page 60: ...60 ExtremeWare 7 7 Command Reference Guide Contents ...
Page 72: ...72 ExtremeWare 7 7 Command Reference Guide Command Reference Overview ...
Page 404: ...404 ExtremeWare 7 7 Command Reference Guide VLAN Commands ...
Page 472: ...472 ExtremeWare 7 7 Command Reference Guide QoS Commands ...
Page 492: ...492 ExtremeWare 7 7 Command Reference Guide NAT Commands ...
Page 890: ...890 ExtremeWare 7 7 Command Reference Guide Security Commands ...
Page 1130: ...1130 ExtremeWare 7 7 Command Reference Guide Security Commands ...
Page 1164: ...1164 ExtremeWare 7 7 Command Reference Guide Configuration and Image Commands ...
Page 1436: ...1436 ExtremeWare 7 7 Command Reference Guide Wireless Commands ...
Page 1490: ...1490 ExtremeWare 7 7 Command Reference Guide EAPS Commands ...
Page 1576: ...1576 ExtremeWare 7 7 Command Reference Guide ESRP Commands ...
Page 1774: ...1774 ExtremeWare 7 7 Command Reference Guide IP Unicast Commands ...
Page 1914: ...1914 ExtremeWare 7 7 Command Reference Guide IGP Commands ...
Page 2000: ...2000 ExtremeWare 7 7 Command Reference Guide BGP Commands i Series Switches Only ...
Page 2140: ...2140 ExtremeWare 7 7 Command Reference Guide IPX Commands i Series Platforms Only ...
Page 2156: ...2156 ExtremeWare 7 7 Command Reference Guide ARM Commands BlackDiamond Switch Only ...
Page 2168: ...2168 ExtremeWare 7 7 Command Reference Guide Remote Connect Commands ...
Page 2346: ...2346 ExtremeWare 7 7 Command Reference Guide PoS Commands BlackDiamond Switch Only ...
Page 2446: ...2446 ExtremeWare 7 7 Command Reference Guide LLDP Commands ...
Page 2496: ...2496 ExtremeWare 7 7 Command Reference Guide H VPLS Commands BlackDiamond Switch Only ...
Page 2620: ...2620 ExtremeWare 7 7 Command Reference Guide Index of Commands ...
