Configuration guidelines

You can change the system time by configuring the relative time, time zone, and daylight saving time. The configuration result depends on their configuration order (see Table 17). In the first column of this table, 1 represents the clock datetime command, 2 represents the clock timezone command, and 3 represents the clock summer-time command. To verify the system time setting, use the display clock command. This table assumes that the original system time is 2005/1/1 1:00:00.

Table 17 System time configuration results

Command

Effective system time

Configuration example System time

1

2

1, 2

2, 1

3

date-time

clock datetime 1:00

 

2007/1/1

Original system time ±

clock timezone

zone-offset

zone-time add 1

 

clock datetime 2:00

date-time ± zone-offset

2007/2/2

clock timezone

 

 

zone-time add 1

 

clock timezone

date-time

zone-time add 1

clock datetime 3:00

 

 

2007/3/3

The original system time

 

outside the daylight

 

saving time range:

clock summer-time ss

The system time does not

one-off 1:00

2006/1/1 1:00

change until it falls into

2006/8/8 2

the daylight saving time

 

range.

 

 

 

The original system time

 

in the daylight saving time

clock summer-time ss

range:

one-off 00:30

The system time increases

2005/1/1 1:00

2005/8/8 2

by summer-offset.

 

01:00:00 UTC Mon 01/01/2007.

02:00:00 zone-time Sat 01/01/2005.

03:00:00 zone-time Fri 02/02/2007.

03:00:00 zone-time Sat 03/03/2007.

01:00:00 UTC Sat 01/01/2005.

03:00:00 ss Sat 01/01/2005.

If the original system time plus summer-offsetis beyond the daylight saving time range, the original system time does not change. After you disable the daylight saving setting, the system time automatically decreases by summer-offset.

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HP 200 Unified Threat Management (UTM) Appliance manual System time configuration results, Date-time, Zone-offset