Synchronizing Local Time - HP SN6000B Hardware Reference Manual

The time zone setting has the following characteristics:
Automatically adjusts for Daylight Savings Time.
Changing the time zone updates the local time zone setup and is reflected in local time
calculations.
By default, switches are in the GMT time zone (0,0). If all switches in a fabric are in one time
zone, you can keep the time zone setup at the default setting.
System services that have already started reflect the time zone changes only after the next
reboot.
In the event of failover, time zone settings are retained to ensure high availability.
You need only set the time zone once on each switch because the value is written to nonvolatile
memory. The following examples show how to set the time zone. The first example uses the time
zone selection; the second uses the country location selection.
The following procedure sets the current time zone to Central Standard Time using the
timezone_fmt command:
1. Log in to the switch using the default password password.
2. Use timezone_fmt to set the time zone by Country/City or by time zone ID, such as PST.
The following example shows how to change the time zone to US/Central:
switch:admin> tstimezone
Time Zone : US/Pacific
switch:admin> tstimezone US/Central
switch:admin> tstimezone
Time Zone : US/Central
The following procedure sets the time zone to Pacific Standard Time using interactive mode:
1. Enter the tstimezone command:
switch:admin> tstimezone --interactive
A list of timezones appears followed by a prompt for you to select a general location:
Please identify a location so that time zone rules can be set
correctly.
2. Enter the appropriate number (an offset of GMT) or press Ctrl+D to quit.
3. At the prompt, select a country location.
4. At the prompt, enter the appropriate number to specify the time zone region, or press Ctrl+D
to quit.

Synchronizing local time

You can synchronize the local time of the principal or primary FCS switch to a maximum of eight
external NTP servers. To keep the time current in your SAN, HP recommends that the principal or
primary FCS switch time is synchronized with at least one external NTP server. The other switches
in the fabric automatically take their time from the principal or primary FCS switch.
All switches in the fabric maintain the current clock server value in nonvolatile memory. By default,
this value is the local clock server LOCL of the principal or primary FCS switch. Changes to the
clock server value on the principal or primary FCS switch are propagated to all switches in the
fabric.
When a switch has been added to the fabric, the time server daemon of the principal or primary
FCS switch sends the addresses of all existing clock servers and the time to that switch. If a switch
running HP B-series Fabric OS 5.3.0 or later has been added to the fabric, it can store the list and
the active servers. Switches running HP B-series Fabric OS 5.3.0 or earlier ignore the new list
parameter in the payload and update only the active server address.
If the active NTP server configured is IPv6, distributing the same information in the fabric is not
possible to switches running HP B-series Fabric OS versions earlier than 5.3.0, because IPv6 is
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