Usage Guidelines - Extreme Networks ExtremeWare XOS Command Reference Manual

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 is specified in +/- minutes from the GMT time.
gmt_offset
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
The starting and ending date and time for DST may be specified, as these vary in time zones around the
world.
Use the keyword to specify a year-after-year repeating set of dates (for example, the last
●
every
Sunday in March every year)
Use the keyword to specify a non-repeating, specific date for the specified year. If you use this
●
on
option, you will need to specify the command again every year.
The specification defaults to
●
begins
The specification defaults to
●
ends
The date may occur earlier in the year than the
●
ends
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 specification defaults to
●
time_of_day
The timezone IDs are optional. They are used only in the display of timezone configuration
●
information in the
show switch
To disable automatic DST changes, re-specify the GMT offset using the
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 6
Table 6: Greenwich Mean Time offsets
GMT Offset GMT Offset
in Hours in Minutes
+0:00 +0
-1:00 -60
-2:00 -120
-3:00 -180
-4:00 -240
-5:00 -300
-6:00 -360
ExtremeWare XOS 11.3 Command Reference
.
every first sunday april
every last sunday october
2:00.
command.
describes the GMT offsets.
Common Time Zone References
GMT - Greenwich Mean
UT or UTC - Universal (Coordinated)
WET - Western European
WAT - West Africa
AT - Azores
AST - Atlantic Standard
EST - Eastern Standard
CST - Central Standard
.
.
date. This will be the case for countries
begins
noautodst
Cities
London, England; Dublin, Ireland;
Edinburgh, Scotland; Lisbon, Portugal;
Reykjavik, Iceland; Casablanca, Morocco
Cape Verde Islands
Azores
Brasilia, Brazil; Buenos Aires, Argentina;
Georgetown, Guyana;
Caracas; La Paz
Bogota, Columbia; Lima, Peru; New York,
NY, Trevor City, MI USA
Mexico City, Mexico
configure timezone
option:
69