Chapter 1 Setting Up the ACE
Configuring the Time, Date, and Time Zone
1-16
Cisco 4700 Series Application Control Engine Appliance Administration Guide
OL-11157-01
Follow these guidelines when you use NTP to automatically configure the ACE
system clock:
•
If you wish to use the Network Time Protocol (NTP) to automatically
synchronize the ACE system clock to an authoritative time server (such as a
radio clock or an atomic clock), see the
“Synchronizing the ACE with an NTP
Server”
section. In this case, the NTP time server automatically sets the ACE
system clock.
•
If you previously configured NTP on an ACE, the ACE prevents you from
using the
clock set
command and displays an error message. To manually set
the ACE system clock, remove the NTP peer and NTP server from the
configuration before setting the clock on an ACE. See the
“Synchronizing the
ACE with an NTP Server”
section for more information.
Setting the Time Zone
To set the time zone for the ACE, use the
clock timezone
command in
configuration mode. The ACE keeps time internally in Universal Time
Coordinated (UTC) offset.
The syntax of this command is as follows:
clock timezone
{
zone_name
{
+
|
–
}
hours minutes
} | {
standard
timezone
}
The keywords, arguments, and options are:
•
zone_name
—Eight-character name of the time zone (for example, PDT) to be
displayed when the time zone is in effect.
Table 1-1
lists the common time
zone acronyms used for the zone argument.
•
{
+
|
–
}
hours
—Hours offset from UTC (plus or minus).
•
minutes
—Minutes offset from UTC. The range is from 0 to 59 minutes.
•
standard
timezone
—Displays a list of well-known time zones that include an
applicable UTC hours offset. Available choices are as follows:
–
ACST
—Australian Central Standard Time as UTC +9.5 hours
–
AKST
—Alaska Standard Time as UTC –9 hours
–
AST
—Atlantic Standard Time as UTC –4 hours
–
BST
—British Summer Time as UTC +1 hour
