7-12
Catalyst 2975 Switch Software Configuration Guide
OL-19720-02
Chapter 7 Administering the Switch
Managing the System Time and Date
Beginning in privileged EXEC mode, follow these steps to set the system clock:
This example shows how to manually set the system clock to 1:32 p.m. on July 23, 2001:
Switch#
clock set 13:32:00 23 July 2001
Displaying the Time and Date Configuration
To display the time and date configuration, use the
show clock
[
detail
] privileged EXEC command.
The system clock keeps an
authoritative
flag that shows whether the time is authoritative (believed to
be accurate). If the system clock has been set by a timing source such as NTP, the flag is set. If the time
is not authoritative, it is used only for display purposes. Until the clock is authoritative and the
authoritative
flag is set, the flag prevents peers from synchronizing to the clock when the peers’ time is
invalid.
The symbol that precedes the
show clock
display has this meaning:
•
*—Time is not authoritative.
•
(blank)—Time is authoritative.
•
.—Time is authoritative, but NTP is not synchronized.
Configuring the Time Zone
Beginning in privileged EXEC mode, follow these steps to manually configure the time zone:
Command
Purpose
Step 1
clock set
hh
:
mm
:
ss
day
month
year
or
clock set
hh
:
mm
:
ss
month day year
Manually set the system clock using one of these formats.
•
For
hh
:
mm
:
ss
, specify the time in hours (24-hour format), minutes,
and seconds. The time specified is relative to the configured time
zone.
•
For
day
, specify the day by date in the month.
•
For
month
, specify the month by name.
•
For
year
, specify the year (no abbreviation).
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
clock timezone
zone
hours-offset
[
minutes-offset
]
Set the time zone.
The switch keeps internal time in universal time coordinated (UTC), so
this command is used only for display purposes and when the time is
manually set.
•
For
zone
, enter the name of the time zone to be displayed when
standard time is in effect. The default is UTC.
•
For
hours-offset
, enter the hours offset from UTC.
•
(Optional) For
minutes-offset
, enter the minutes offset from UTC.
Step 3
end
Return to privileged EXEC mode.
