Clock Commands on the Cisco€IOS€XR Software

Clock Commands on the Cisco€IOS€XR Software
Clock Commands on the Cisco IOS XR Software
This module describes the commands used to set and display the internal clock settings in Cisco IOS XR
software.
For more information about manually setting the router clock, see Cisco IOS XR Getting Started Guide for
the Cisco XR 12000 Series Router.
For more information about configuring the router to synchronize to Network Time Protocol (NTP), see the
Implementing NTP on Cisco IOS XR Software module in Cisco IOS XR System Management Configuration
Guide for the Cisco XR 12000 Series Router.
• clock read-calendar, page 2
• clock set, page 4
• clock summer-time, page 7
• clock timezone, page 10
• clock update-calendar, page 15
• locale country, page 17
• locale language, page 19
• show clock, page 21
• show clock sync, page 23
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clock read-calendar
clock read-calendar
To manually copy the hardware clock (calendar) settings into the software clock, use the clock read-calendar
command in EXEC mode.
clock read-calendar
Command Default
Read calendar is disabled.
Command Modes
EXEC
Command History
Usage Guidelines
Release
Modification
Release 3.2
This command was introduced.
Release 3.3.0
No modification.
Release 3.4.0
No modification.
Release 3.5.0
No modification.
Release 3.6.0
No modification.
Release 3.7.0
No modification.
Release 3.8.0
No modification.
Release 3.9.0
No modification.
To use this command, you must be in a user group associated with a task group that includes appropriate task
IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator
for assistance.
The calendar clock is a hardware system clock that runs continuously, even if the router is powered off or
rebooted. The hardware system clock is separate from the software clock settings, which are erased when the
router is power cycled or rebooted.
Use the clock read-calendar command to manually copy the hardware clock setting into the software clock.
Task ID
Task ID
Operations
host-services
execute
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clock read-calendar
Examples
In the following example, the hardware clock settings are copied to the software clock with the clock
read-calendar command. The show clock command is then entered to display the new software clock settings.
RP/0/0/CPU0:router# clock read-calendar
RP/0/0/CPU0:router# show clock
14:31:57.089 PST Tue Feb 10 2008
Related Commands
Command
Description
clock set
Changes the software clock settings.
clock update-calendar
Copies the software clock settings to the hardware clock (calendar).
show clock
Displays the system clock.
update-calendar
Updates the calendar periodically from NTP.
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clock set
clock set
To change the software clock settings, use the clock set command in EXEC mode.
clock set hh:mm:ss {day month| month day} year
Syntax Description
hh:mm:ss
Current time in hours (24-hour format), minutes, and seconds. Colons are
required between values.
day
Current day (by date) in the month.
month
Current month (by name).
year
Current year (no abbreviation). Enter a valid four-digit year.
Command Default
Clock is not set.
Command Modes
EXEC
Command History
Usage Guidelines
Release
Modification
Release 3.2
This command was introduced.
Release 3.3.0
No modification.
Release 3.4.0
No modification.
Release 3.5.0
No modification.
Release 3.6.0
No modification.
Release 3.7.0
No modification.
Release 3.8.0
No modification.
Release 3.9.0
No modification.
To use this command, you must be in a user group associated with a task group that includes appropriate task
IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator
for assistance.
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clock set
Generally, if the system is synchronized by a valid outside timing mechanism, such as a Network Time Protocol
(NTP) clock source, or if you have a networking device with calendar capability, you need not set the software
clock. Use the clock set command if no other time sources are available. The time specified in this command
is relative to the configured time zone.
Task ID
Task ID
Operations
host-services
execute
Examples
Setting the Software Clock
This example shows how to set the software clock using the clock set command with the day month arguments
first.
RP/0/0/CPU0:router# clock set 14:12:00 10 feb 2005
14:12:00.114 JST Fri Feb 10 2009
This example shows how to set the software clock using the clock set command with the month day arguments
first.
RP/0/0/CPU0:router# clock set 14:38:00 feb 10 2005
14:38:00.069 PST Tue Feb 10 2009
Examples
This example shows how to display the settings of the software clock:
RP/0/0/CPU0:router# show clock
14:38:11.292 PST Tue Feb 10 2009
Examples
This example shows how to display the available months using the online help (?) function:
RP/0/0/CPU0:router# clock set 06:10:00 12 ?
january
february
march
april
may
june
july
august
september
october
november
december
Month of the Year
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clock set
Related Commands
Command
Description
clock summer-time
Configures the system to switch automatically to daylight saving
time.
clock timezone
Sets the time zone for display.
show clock
Displays the system clock.
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clock summer-time
clock summer-time
To configure the system to switch automatically to summer time (daylight saving time), use the clock
summer-time command in global configuration mode. To remove the daylight saving time setting, use the
no form of this command.
clock summer-time zone {date {date month year hh:mm date month year hh:mm| month date year hh:mm
month date year hh:mm}| recurring week day month hh:mm week day month hh:mm} [ offset ]
no clock summer-time
Syntax Description
Command Default
zone
Name of the time zone (for example, PDT) to be displayed when summer time
is in effect. Table 1: Common Time Zone Acronyms, on page 11 lists common
time zone acronyms used for the zone argument.
date
Indicates that summer time should start on the first specific date listed in the
command and end on the second specific date in the command.
date
Date of the month.
month
Month.
year
Year (no abbreviation).
hh:mm
Time (24-hour format) in hours and minutes.
recurring
Indicates that summer time should start and end on the corresponding specified
days every year.
week
Week of the month (values are 1 to 5, first or last).
day
Day of the week.
offset
(Optional) Number of minutes to add during summer time.
Summer time is not configured.
offset: 60
Command Modes
Command History
Global configuration
Release
Modification
Release 3.2
This command was introduced.
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clock summer-time
Usage Guidelines
Release
Modification
Release 3.3.0
No modification.
Release 3.4.0
No modification.
Release 3.5.0
No modification.
Release 3.6.0
No modification.
Release 3.7.0
No modification.
Release 3.8.0
No modification.
Release 3.9.0
No modification.
To use this command, you must be in a user group associated with a task group that includes appropriate task
IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator
for assistance.
Use the clock summer-time command if you want the system to switch automatically to summer time (for
display only):
• Use the recurring keyword to apply the rules on the configured day each year. If clock summer-time
zone recurring is specified without parameters, the summer time rules default to United States standards.
The default for the offset argument is 60 minutes.
• Use the date keyword to specify a start and end date for summer time if you cannot use the first form.
In both forms of the command, the first part of the command specifies when summer time begins and the
second part specifies when it ends. All times are relative to the local time zone. The start time is relative to
standard time. The end time is relative to summer time. If the starting month is after the ending month, the
system assumes that you are in the Southern Hemisphere.
Task ID
Examples
Task ID
Operations
host-services
read, write
The following example specifies that summer time starts on the first Sunday in April at 02:00 and ends on
the last Sunday in October at 02:00. The recurring keyword indicates that the rules apply every year.
RP/0/0/CPU0:router(config)# clock summer-time PDT recurring 1 Sunday April 2:00 last Sunday
October 2:00
If you live where summer time does not follow the pattern in the first example, you could set it to start on
October 12, 2008 at 02:00 and end on April 26, 2009 at 02:00, with the following example. The date keyword
indicates that the rules apply for the current year only.
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clock summer-time
RP/0/0/CPU0:router(config)# clock summer-time PDT date 12 October 2008 2:00 26 April 2009
2:00
Related Commands
Command
Description
clock set
Changes the software clock settings.
clock timezone
Sets the time zone for display.
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clock timezone
clock timezone
To set the time zone for display, use the clock timezone command in global configuration mode. To remove
the time zone setting, use the no form of this command.
clock timezone zone hours-offset [ minutes-offset ]
no clock timezone
Syntax Description
zone
Name of the time zone to be displayed when standard time is in effect.
hours-offset
Hours offset from Coordinated Universal Time (UTC). Range is from –23
to +23.
minutes-offset
(Optional) Minutes offset from UTC.
Command Default
UTC
Command Modes
Global configuration
Command History
Usage Guidelines
Release
Modification
Release 3.2
This command was introduced.
Release 3.3.0
No modification.
Release 3.4.0
No modification.
Release 3.5.0
No modification.
Release 3.6.0
No modification.
Release 3.7.0
No modification.
Release 3.8.0
No modification.
Release 3.9.0
No modification.
To use this command, you must be in a user group associated with a task group that includes appropriate task
IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator
for assistance.
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clock timezone
Use the clock timezone command to display the time zone only when setting the time manually. The system
keeps time internally in UTC.
This table lists common time zone acronyms used for the zone argument.
Table 1: Common Time Zone Acronyms
Acronym
Time Zone Name and UTC Offset
Europe
GMT
Greenwich Mean Time, as UTC.
BST
British Summer Time, as UTC plus 1 hour.
IST
Irish Summer Time, as UTC plus 1 hour.
WET
Western Europe Time, as UTC.
WEST
Western Europe Summer Time, as UTC plus 1 hour.
CET
Central Europe Time, as UTC plus 1 hour.
CEST
Central Europe Summer Time, as UTC plus 2 hours.
EET
Eastern Europe Time, as UTC plus 2 hours.
EEST
Eastern Europe Summer Time, as UTC plus 3 hours.
MSK
Moscow Time, as UTC plus 3 hours.
MSD
Moscow Summer Time, as UTC plus 4 hours.
United States and Canada
AST
Atlantic Standard Time, as UTC minus 4 hours.
ADT
Atlantic Daylight Time, as UTC minus 3 hours.
ET
Eastern Time, either as EST or EDT, depending on place and time of
year.
EST
Eastern Standard Time, as UTC minus 5 hours.
EDT
Eastern Daylight Saving Time, as UTC minus 4 hours.
CT
Central Time, either as CST or CDT, depending on place and time of
year.
CST
Central Standard Time, as UTC minus 6 hours.
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clock timezone
Acronym
Time Zone Name and UTC Offset
CDT
Central Daylight Saving Time, as UTC minus 5 hours.
MT
Mountain Time, either as MST or MDT, depending on place and time
of year.
MST
Mountain Standard Time, as UTC minus 7 hours.
MDT
Mountain Daylight Saving Time, as UTC minus 6 hours.
PT
Pacific Time, either as PST or PDT, depending on place and time of
year.
PST
Pacific Standard Time, as UTC minus 8 hours.
PDT
Pacific Daylight Saving Time, as UTC minus 7 hours.
AKST
Alaska Standard Time, as UTC minus 9 hours.
AKDT
Alaska Standard Daylight Saving Time, as UTC minus 8 hours.
HST
Hawaiian Standard Time, as UTC minus 10 hours.
Australia
WST
Western Standard Time, as UTC plus 8 hours.
CST
Central Standard Time, as UTC plus 9.5 hours.
EST
Eastern Standard/Summer Time, as UTC plus 10 hours (plus 11 hours
during summer time).
This table lists an alternative method for referring to time zones, in which single letters are used to refer to
the time zone difference from UTC. Using this method, the letter Z is used to indicate the zero meridian,
equivalent to UTC, and the letter J (Juliet) is used to refer to the local time zone. Using this method, the
International Date Line is between time zones M and Y.
Table 2: Single-Letter Time Zone Designators
Letter Designator
Word Designator
Difference from UTC
Y
Yankee
UTC minus 12 hours.
X
Xray
UTC minus 11 hours.
W
Whiskey
UTC minus 10 hours.
V
Victor
UTC minus 9 hours.
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clock timezone
Task ID
Letter Designator
Word Designator
Difference from UTC
U
Uniform
UTC minus 8 hours.
T
Tango
UTC minus 7 hours.
S
Sierra
UTC minus 6 hours.
R
Romeo
UTC minus 5 hours.
Q
Quebec
UTC minus 4 hours.
P
Papa
UTC minus 3 hours.
O
Oscar
UTC minus 2 hours.
N
November
UTC minus 1 hour.
Z
Zulu
Same as UTC.
A
Alpha
UTC plus 1 hour.
B
Bravo
UTC plus 2 hours.
C
Charlie
UTC plus 3 hours.
D
Delta
UTC plus 4 hours.
E
Echo
UTC plus 5 hours.
F
Foxtrot
UTC plus 6 hours.
G
Golf
UTC plus 7 hours.
H
Hotel
UTC plus 8 hours.
I
India
UTC plus 9 hours.
K
Kilo
UTC plus 10 hours.
L
Lima
UTC plus 11 hours.
M
Mike
UTC plus 12 hours.
Task ID
Operations
host-services
read, write
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clock timezone
Examples
The following example shows how to set the time zone to PST and offset 8 hours behind UTC:
RP/0/0/CPU0:router(config)# clock timezone PST -8
The following example shows how to set the time zone to Newfoundland Standard Time (NST) for
Newfoundland, Canada, which is 3.5 hours behind UTC:
RP/0/0/CPU0:router(config)# clock timezone NST -3 30
Related Commands
Command
Description
clock set
Changes the software clock settings.
clock summer-time
Configures the system to switch automatically to daylight saving time.
show clock
Displays the system clock.
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clock update-calendar
clock update-calendar
To copy the software clock settings to the hardware clock (calendar), use the clock update-calendar command
in EXEC mode.
clock update-calendar
Syntax Description
This command has no keywords or arguments.
Command Default
No default behavior or values
Command Modes
EXEC
Command History
Usage Guidelines
Release
Modification
Release 3.2
This command was introduced.
Release 3.3.0
No modification.
Release 3.4.0
No modification.
Release 3.5.0
No modification.
Release 3.6.0
No modification.
Release 3.7.0
No modification.
Release 3.8.0
No modification.
Release 3.9.0
No modification.
To use this command, you must be in a user group associated with a task group that includes appropriate task
IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator
for assistance.
The hardware clock (calendar) runs continuously, even if the router is powered off or rebooted. If the software
clock and calendar are not synchronized and the software clock is more accurate, use this command to update
the hardware calendar clock to the correct date and time.
Task ID
Task ID
Operations
host-services
execute
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clock update-calendar
Examples
The following example shows how to copy the current time from the software clock to the hardware clock:
RP/0/RP0/CPU0:router# clock update-calendar
Related Commands
Command
Description
clock read-calendar
Manually copies the hardware clock (calendar) settings into the
software clock.
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locale country
locale country
To set the default country of use, use the locale country command in global configuration mode. To remove
the country setting, use the no form of this command.
locale country country
no locale country
Syntax Description
country
Country, where country is a two-character country code. Case is not important.
Command Default
No default behavior or values
Command Modes
Global configuration
Command History
Usage Guidelines
Note
Release
Modification
Release 3.2
This command was introduced.
Release 3.3.0
No modification.
Release 3.4.0
No modification.
Release 3.5.0
No modification.
Release 3.6.0
No modification.
Release 3.7.0
No modification.
Release 3.8.0
No modification.
Release 3.9.0
No modification.
To use this command, you must be in a user group associated with a task group that includes appropriate task
IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator
for assistance.
This command is not fully supported at this time.
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locale country
To display a complete listing of the available country codes, use the online help ( ? ) function:
RP/0/0/CPU0:router(config)# locale country ?
AD
Andorra
AE
United Arab Emirates
AF
Afghanistan
AG
Antigua and Barbuda
AI
Anguilla
AL
Albania
AM
Armenia
AN
Netherlands Antilles
AO
Angola
AQ
Antarctica
AR
Argentina
AS
American Samoa
AT
Austria
AU
Australia
AW
Aruba
AZ
Azerbaijan
BA
Bosnia and Herzegovina
BB
Barbados
BD
Bangladesh
BE
Belgium
--More--
Task ID
Examples
Task ID
Operations
host-services
read, write
The following example shows how to set the country of use to Australia:
RP/0/0/CPU0:router(config)# locale country au
Related Commands
Command
Description
locale language
Sets the default language of use.
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locale language
locale language
To set the default language of use, use the locale language command in global configuration mode. To
remove the language setting, use the no form of this command.
locale language language
no locale language
Syntax Description
language
Command Default
No default behavior or values
Command Modes
Global configuration
Command History
Usage Guidelines
Note
Two-character code that specifies the language. Case is not important.
Release
Modification
Release 3.2
This command was introduced.
Release 3.3.0
No modification.
Release 3.4.0
No modification.
Release 3.5.0
No modification.
Release 3.6.0
No modification.
Release 3.7.0
No modification.
Release 3.8.0
No modification.
Release 3.9.0
No modification.
To use this command, you must be in a user group associated with a task group that includes appropriate task
IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator
for assistance.
This command is not fully supported at this time.
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locale language
To display a complete listing of the available language codes, use the online help (?) function:
RP/0/0/CPU0:router(config)# locale language ?
aa
Afar
ab
Abkhazian
af
Afrikaans
am
Amharic
ar
Arabic
as
Assamese
ay
Aymara
--More--
Task ID
Examples
Task ID
Operations
host-services
read, write
The following example shows how to set the language of use to English:
RP/0/0/CPU0:router(config)# locale language en
Related Commands
Command
Description
locale country
Sets the default country of use.
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show clock
show clock
To display the system clock, use the show clock command in EXEC mode.
show clock [detail]
Syntax Description
(Optional) Indicates the time zone, time source, and current summer time setting
(if any).
detail
Command Default
No default behavior or values
Command Modes
EXEC
Command History
Usage Guidelines
Release
Modification
Release 3.2
This command was introduced.
Release 3.3.0
No modification.
Release 3.4.0
No modification.
Release 3.5.0
No modification.
Release 3.6.0
No modification.
Release 3.7.0
No modification.
Release 3.8.0
No modification.
Release 3.9.0
No modification.
To use this command, you must be in a user group associated with a task group that includes appropriate task
IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator
for assistance.
The system clock keeps an “authoritative” flag that indicates whether the time is authoritative (believed to be
accurate). If the system clock has been set by a timing source, such as system calendar or Network Time
Protocol (NTP), the flag is set. If the time is not authoritative, it is used only for display. Until the clock is
authoritative and the “authoritative” flag is set, the flag prevents peers from synchronizing to the clock when
the peers have invalid times.
The leading symbols that precede the show clock command display are shown in this table
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show clock
Table 3: show clock Display Leading Symbol Descriptions
Task ID
Examples
Symbol
Description
*
Time is not authoritative.
(blank)
Time is authoritative.
.
Time is authoritative, but NTP is not synchronized.
Task ID
Operations
basic-services
read
The following sample output shows the current clock settings:
RP/0/0/CPU0:router# show clock
16:18:28.927 PST Tue Feb 10 2009
The following sample output shows the current clock detail, including the time zone and time source:
RP/0/0/CPU0:router# show clock detail
16:18:07.164 PST Tue Feb 10 2009
Timezone: PST8PST Timesource: User configured
Related Commands
Command
Description
clock set
Changes the software clock settings.
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show clock sync
show clock sync
To show the time difference between the clocks on route processors (RPs) and other line cards (LCs), use the
show clock sync command in EXEC command mode.
show clock sync
Command Default
Displays the clock time for each RP or LC in a secure domain router (SDR), relative to the clock time on the
RP where the command is entered.
Command Modes
EXEC
Usage Guidelines
Release
Modification
Release 3.2
This command was introduced.
Release 3.3.0
No modification.
Release 3.4.0
No modification.
Release 3.5.0
No modification.
Release 3.6.0
No modification.
Release 3.7.0
No modification.
Release 3.8.0
No modification.
Release 3.9.0
No modification.
To use this command, you must be in a user group associated with a task group that includes appropriate task
IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator
for assistance.
In a router running Cisco IOS XR software the time clock in the primary RP is synchronized with the other
RPs, DRPs, and LCs in the system. This synchronization ensures that the standby RP has an accurate time
setting if it assumes the primary role and that the events in logs between different RPs and LCs can be easily
correlated during debugging.
The show clock sync command verifies that the cards in the router are synchronized with the primary RP.
When this command is run, the primary RP queries the clocks on each card in the system and displays the
time difference between each card and the primary RP. If the time setting on the card is different from the
time on the primary RP, the display shows if the clock on the card is being adjusted to synchronize with the
primary RP.
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show clock sync
Note
Task ID
Examples
The show clock sync command shows the relative time difference between the RP where it is run and the
cards in that SDR. If the command is run on the primary RP for the owner SDR, then the results show the
relative time settings for the cards assigned to the owner SDR. If the command is run on the DSDRSC
for a non-owner SDR, then the results are for the cards in that SDR. The show clock sync command can
also be run on the standby RP, but the times displayed are relative to that RP.
Task ID
Operations
ip-services
read
basic-services
read
The following example illustrates sample output from the show clock sync command:
RP/0/0/CPU0:router# show clock sync
RoundTrip
Time
Slot
Card
Delay
Offset
Local Time
---------------------------------------------------------------------0 RP
Card
0 ms
0.000 s
16:00:05.798 UTC Sun Apr 09 2006
1 RP
Card
1 ms
0.001+s +16:00:05.798 UTC Sun Apr 09 2006
2 Line Card
2 ms
0.000 s -16:00:05.798 UTC Sun Apr 09 2006
3 Line Card
15 ms
0.004+s -16:00:05.802 UTC Sun Apr 09 2006
4 Line Card
1 ms
0.001+s -16:00:05.798 UTC Sun Apr 09 2006
5 Line Card
2 ms
0.002+s +16:00:05.799 UTC Sun Apr 09 2006
Table 4: show clock sync Field Descriptions
Field
Description
Slot
Physical slot number of the card.
Card
Type of card on the specified slot.
RoundTrip Delay
Time (in milliseconds) required for the test message
to travel between the RP and LC and back.
Time Offset
Time difference (in seconds) between cards shown
in the display.
Local Time
Displays the system clock setting. This is the same
as the output displayed with the show clock
command. The positive (+) or negative (-) sign is
added if the card is being adjusted to run faster or
slower.
Cisco IOS XR System Management Command Reference for the Cisco XR 12000 Series Router, Release 3.9
24
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Clock Commands on the Cisco IOS XR Software
show clock sync
Related Commands
Command
Description
clock set
Changes the software clock settings.
show clock
Displays the system clock.
Cisco IOS XR System Management Command Reference for the Cisco XR 12000 Series Router, Release 3.9
OL-20310-01
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Clock Commands on the Cisco IOS XR Software
show clock sync
Cisco IOS XR System Management Command Reference for the Cisco XR 12000 Series Router, Release 3.9
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OL-20310-01
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