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Cisco SCE 8000 10GBE Software Configuration Guide
OL-30621-02
Chapter 6 Global Configuration
Configuring Time Clocks and Time Zone
The day on which the transition takes place may be defined in several ways:
•
Specific date—For example, March 29, 2004. A specific date, including the year, is defined for a not
recurring configuration.
•
First/last occurrence of a day of the week in a specified month—For example, the last Sunday in
March. This is used for a recurring configuration.
•
Day of the week in a specific week in a specified month—For example, Sunday of the fourth week
of March. (This would be different from the last Sunday of the month whenever there were five
Sundays in the month). This is used for a recurring configuration.
The following options are available:
•
zone—
The time zone code for daylight saving time
•
week
(recurring only)— the week of the month on which daylight saving begins (week1) and ends
(week2)
•
day
(recurring only)—The day of the week on which daylight savings begin (day1) and ends (day2)
•
date
(non-recurring only)—The date of the month on which daylight saving begins (date1) and ends
(date2)
•
month—
The month in which daylight saving begins (month1) and ends (month2)
•
year
(non-recurring only)—The year in which daylight saving begins (year1) and ends (year2)
•
offset—
The difference in minutes between standard time and daylight saving time.
Default = 60 minutes
Guidelines
General guidelines for configuring daylight saving time transitions:
•
Specify the time zone code for daylight saving time.
•
recurring—Specify a day of the month (week#|first|last/day of the week/month).
•
not recurring—Specify a date (month/day of the month/year).
•
Define two days:
–
Day1 = beginning of daylight saving time.
–
Day2 = end of daylight saving time.
•
In the Southern hemisphere, month2 must be before month1, as daylight saving time begins in the
fall and ends in the spring.
•
Specify the exact time that the transition should occur (24 hour clock).
–
Time of transition into daylight saving time—According to local standard time.
–
Time of transition out of daylight saving time—According to local daylight savings time.
•
For the
clock summer-time recurring
command, the default values are the United States transition
rules:
–
Daylight saving time begins: 2:00 (AM) on the second Sunday of March.
–
Daylight saving time ends: 2:00 (AM) on the first Sunday of November.
