Displaying The System Clock - 3Com 4500G Family Configuration Manual

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Displaying the system clock

The system clock is decided by the commands clock datetime, clock timezone and clock
summer-time. If these three commands are not configured, the display clock command displays the
original system clock. If you combine these three commands in different ways, the system clock is
displayed in the ways shown in
are as follows:
1 indicates date-time has been configured with the clock datetime.
2 indicates time-zone has been configured with the clock timezone command and the offset time
is zone-offset.
3 indicates daylight saving time has been configured with the clock summer-time command and
the offset time is summer-offset.
[1] indicates the clock datetime command is an optional configuration.
The default system clock is 2005/1/1 1:00:00 in the example.
Table 1-1 Relationship between the configuration and display of the system clock
Configuration
1
2
1 and 2
[1], 2 and 1
3
Use the command...
clock summer-time
zone-name repeating
start-time start-date end-time
end-date add-time
Table 1-1. The meanings of the parameters in the configuration column
System clock displayed by the
display clock command
date-time
The original system clock ± zone-offset
date-time ± zone-offset
date-time
If the original system clock is not in the
daylight saving time range, the original
system clock is displayed.
If the original system clock is in the
daylight saving time range, the original
system clock + summer-offset is
displayed.
is configured on the device, and
the UTC time zone is applied.
Configure: clock datetime 1:00
2007/1/1
Display: 01:00:00 UTC Mon
01/01/2007
Configure: clock timezone zone-time
add 1
Display: 02:00:00 zone-time Sat
01/01/2005
Configure: clock datetime 2:00
2007/2/2 and clock timezone
zone-time add 1
Display: 03:00:00 zone-time Fri
02/02/2007
Configure: clock timezone zone-time
add 1 and clock datetime 3:00
2007/3/3
Display: 03:00:00 zone-time Sat
03/03/2007
Configure: clock summer-time ss
one-off 1:00 2006/1/1 1:00 2006/8/8 2
Display: 01:00:00 UTC Sat 01/01/2005
Configure: clock summer-time ss
one-off 00:30 2005/1/1 1:00 2005/8/8 2
Display: 03:00:00 ss Sat 01/01/2005
1-4
Remarks
Example