Reference Guide

System Time and Date | 1149
Default
Not configured.
Command Modes
CONFIGURATION
Command
History
Usage
Information
Coordinated Universal Time (UTC) is the time standard based on the International Atomic Time
standard, commonly known as Greenwich Mean time. When determining system time, you must
include the differentiator between UTC and your local timezone. For example, San Jose, CA is the
Pacific Timezone with a UTC offset of -8.
clock update-calendar
c e s z
Set the switch hardware clock based on the software clock.
Syntax
clock update-calendar
Defaults
Not configured.
Command Modes
EXEC Privilege
Command
History
Usage
Information
Use this command only if you are sure that the hardware clock is inaccurate and the software clock is
correct. You cannot delete this command (that is, there is not a “no” form of this command).
Related
Commands
debug ntp
c e s z
Display Network Time Protocol (NTP) transactions and protocol messages for troubleshooting.
Syntax
debug ntp {adjust | all | authentication | events | loopfilter | packets | select | sync}
To disable debugging of NTP transactions, use the no debug ntp {adjust | all | authentication | events |
loopfilter | packets | select | sync} command.
Parameters
Version 8.3.11.1 Introduced on Z9000
Version 7.6.1.0 Support added for S-Series
Version 7.5.1.0 Support added for C-Series
pre-Version 6.1.1.0 Introduced for E-Series
Version 8.3.11.1 Introduced on Z9000
Version 7.6.1.0 Support added for S-Series
Version 7.5.1.0 Support added for C-Series
pre-Version 6.1.1.0 Introduced for E-Series
calendar set Set the hardware clock.
adjust Enter the keyword adjust to display information on NTP clock adjustments.
all Enter the keyword all to display information on all NTP transactions.
authentication Enter the keyword authentication to display information on NTP authentication
transactions.