Fabric OS Administrator's Guide v7.0.0 (53-1002148-02, June 2011)

Fabric OS Administrator’s Guide 27
53-1002148-02
Date and time settings
2
1. Connect to the switch and log in using an account assigned to the admin role and with the
chassis-role permission.
2. Enter the tsTimeZone command.
• Use tsTimeZone with no parameters to display the current time zone setting.
• Use --interactive to list all of the time zones supported by the firmware.
• Use timeZone_fmt to set the time zone by Country/City or by time zone ID, such as Pacific
Standard Time (PST).
Example of displaying and changing 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
Setting the time zone interactively
The following procedure describes how to set the current time zone to PST using interactive mode.
1. Connect to the switch and log in using an account assigned to the admin role and with the
chassis-role permission.
2. Enter the tsTimeZone
--interactive command.
You are prompted to select a general location.
Please identify a location so that time zone rules can be set correctly.
3. Enter the appropriate number or press Ctrl-D to quit.
4. Select a country location at the prompt.
5. Enter the appropriate number at the prompt to specify the time zone region of Ctrl-D to quit.
Network time protocol
You can synchronize the local time of the principal or primary fabric configuration server (FCS)
switch to a maximum of eight external Network Time Protocol (NTP) servers. To keep the time in
your SAN current, it is recommended that the principal or primary FCS switch has its time
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, as described in “Synchronizing the local
time with an external source.”
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.
In a Virtual Fabric, all the switches in the fabric must have the same NTP clock server configured.
This includes any Fabric OS v6.2.0 or earlier switches in the fabric. This ensures that time does not
go out of sync in the logical fabric. It is not recommended to have LOCL in the server list.
When a new switch enters the fabric, the time server daemon of the principal or primary FCS switch
sends out the addresses of all existing clock servers and the time to the new switch. When a switch
with Fabric OS v6.1.0 or later enters the fabric, it stores the list and the active servers.