Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 931

Configuring a Custom-defined Period for NTP time Synchronization

Page 931 highlights

- start-week: (OPTIONAL) Enter one of the following as the week that daylight saving begins and then enter values for start-day through end-time: * week-number: Enter a number from 1 to 4 as the number of the week in the month to start daylight saving time. * first: Enter the keyword first to start daylight saving time in the first week of the month. * last: Enter the keyword last to start daylight saving time in the last week of the month. - start-month: Enter the name of one of the 12 months in English. You can enter the name of a day to change the order of the display to time day month year. - start-day: Enter the number of the day. The range is from 1 to 31. You can enter the name of a month to change the order of the display to time day month year. - start-year: Enter a four-digit number as the year. The range is from 1993 to 2035. - start-time: Enter the time in hours:minutes. For the hour variable, use the 24-hour format; example, 17:15 is 5:15 pm. - end-week: If you entered a start-week, enter the one of the following as the week that daylight saving ends: * week-number: Enter a number from 1 to 4 as the number of the week in the month to start daylight saving time. * first: Enter the keyword first to start daylight saving time in the first week of the month. * last: Enter the keyword last to start daylight saving time in the last week of the month. - end-month: Enter the name of one of the 12 months in English. You can enter the name of a day to change the order of the display to time day month year. - end-day: Enter the number of the day. The range is from 1 to 31. You can enter the name of a month to change the order of the display to time day month year. - end-year: Enter a four-digit number as the year. The range is from 1993 to 2035. - end-time: Enter the time in hours:minutes. For the hour variable, use the 24-hour format; example, 17:15 is 5:15 pm. - offset: (OPTIONAL) Enter the number of minutes to add during the summer-time period. The range is from 1 to1440. The default is 60 minutes. Examples of Configuring and Viewing the Clock Summer-Time Recurring Option The following example shows using the clock summer-time recurring command. Dell(conf)#clock summer-time pacific recurring Mar 14 2009 00:00 Nov 7 2009 00:00 ? Dell(conf)#02:02:13: %SYSTEM-P:CP %CLOCK-6-TIME CHANGE: Summertime configuration changed from "none" to "Summer time starts 00:00:00 Pacific Sat Mar 14 2009;Summer time ends 00:00:00 pacific Sat Nov 7 2009" NOTE: If you enter after entering the recurring command parameter, and you have already set a one-time daylight saving time/date, the system uses that time and date as the recurring setting. To view the clock summer-time recurring parameters, use the clock summer-time recurring ? command. Dell(conf)#clock summer-time pacific recurring ? Week number to start first Week number to start last Week number to start Dell(conf)#clock summer-time pacific recurring Dell(conf)#02:10:57: %SYSTEM-P:CP %CLOCK-6-TIME CHANGE: Summertime configuration changed from "Summer time starts 00:00:00 Pacific Sat Mar 14 2009 ; Summer time ends 00:00:00 pacific Sat Nov 7 2009" to "Summer time starts 02:00:00 Pacific Sun Mar 8 2009;Summer time ends 02:00:00 pacific Sun Nov 1 2009" Configuring a Custom-defined Period for NTP time Synchronization You can configure the system to send an audit log message to a syslog server if the time difference from the NTP server is greater than a threshold value (offset-threshold). However, time synchronization still occurs. To configure the offset-threshold, follow this procedure. • Specify the threshold time interval before which the system generates an NTP audit log message if the system time deviates from the NTP server. System Time and Date 931

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start-week
: (OPTIONAL) Enter one of the following as the week that daylight saving begins and then enter values for
start-day
through
end-time
:
*
week-number
: Enter a number from 1 to 4 as the number of the week in the month to start daylight saving time.
*
first
: Enter the keyword
first
to start daylight saving time in the first week of the month.
*
last
: Enter the keyword
last
to start daylight saving time in the last week of the month.
start-month
: Enter the name of one of the 12 months in English. You can enter the name of a day to change the order
of the display to
time day month year
.
start-day
: Enter the number of the day. The range is from 1 to 31. You can enter the name of a month to change the
order of the display to
time day month year
.
start-year
: Enter a four-digit number as the year. The range is from 1993 to 2035.
start-time
: Enter the time in hours:minutes. For the hour variable, use the 24-hour format; example, 17:15 is 5:15 pm.
end-week
: If you entered a start-week, enter the one of the following as the week that daylight saving ends:
*
week-number
: Enter a number from 1 to 4 as the number of the week in the month to start daylight saving time.
*
first
: Enter the keyword
first
to start daylight saving time in the first week of the month.
*
last
: Enter the keyword
last
to start daylight saving time in the last week of the month.
end-month
: Enter the name of one of the 12 months in English. You can enter the name of a day to change the order of
the display to
time day month year
.
end-day
: Enter the number of the day. The range is from 1 to 31. You can enter the name of a month to change the
order of the display to
time day month year
.
end-year
: Enter a four-digit number as the year. The range is from 1993 to 2035.
end-time
: Enter the time in hours:minutes. For the hour variable, use the 24-hour format; example, 17:15 is 5:15 pm.
offset
: (OPTIONAL) Enter the number of minutes to add during the summer-time period. The range is from 1 to1440.
The default is
60 minutes
.
Examples of Configuring and Viewing the Clock Summer-Time Recurring Option
The following example shows using the
clock summer-time recurring
command.
Dell(conf)#clock summer-time pacific recurring Mar 14 2009 00:00 Nov 7 2009 00:00 ?
Dell(conf)#02:02:13: %SYSTEM-P:CP %CLOCK-6-TIME CHANGE: Summertime configuration changed from
"none" to "Summer time starts 00:00:00 Pacific Sat Mar 14 2009;Summer time ends 00:00:00 pacific
Sat Nov 7 2009"
NOTE:
If you enter <CR> after entering the
recurring
command parameter, and you have already set a one-time daylight
saving time/date, the system uses that time and date as the recurring setting.
To view the clock summer-time recurring parameters, use the
clock summer-time
<time>
recurring ?
command.
Dell(conf)#clock summer-time pacific recurring ?
<1-4>
Week number to start
first
Week number to start
last
Week number to start
<cr>
Dell(conf)#clock summer-time pacific recurring
Dell(conf)#02:10:57: %SYSTEM-P:CP %CLOCK-6-TIME CHANGE: Summertime configuration changed from
"Summer time starts 00:00:00 Pacific Sat Mar 14 2009 ; Summer time ends 00:00:00 pacific Sat Nov
7 2009" to "Summer time starts 02:00:00 Pacific Sun Mar 8 2009;Summer time ends 02:00:00 pacific
Sun Nov 1 2009"
Configuring a Custom-defined Period for NTP time
Synchronization
You can configure the system to send an audit log message to a syslog server if the time difference from the NTP server is
greater than a threshold value (offset-threshold). However, time synchronization still occurs. To configure the offset-threshold,
follow this procedure.
Specify the threshold time interval before which the system generates an NTP audit log message if the system time deviates
from the NTP server.
System Time and Date
931