Brocade Communications Systems 6510 Installation Guide download pdf (Page 24)

• You can view the time zone settings. However, only those with administrative permissions can set

the time zones.

• The tsTimeZone setting automatically adjusts for Daylight Savings Time.

• Changing the time zone on a switch updates the local time zone setup and is reflected in local time

calculations.

• By default, all switches are in the GMT time zone (0,0). If all switches in a fabric are in one time

zone, it is possible for you to keep the time zone setup at the default setting.

• System services that have already started will reflect the time zone changes only after the next

reboot.

• Time zone settings persist across failover for high availability.

Local time synchronization

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 will automatically take their time from

the principal or primary FCS switch.

All switches in the fabric maintain the current clock server value in non-volatile 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 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. If a switch with

v5.3.0 or later has entered the fabric it will be able to store the list and the active servers; pre-5.3.0

Fabric OS switches will ignore the new list parameter in the payload and will update only the active

server address.

If the active NTP server configured is IPv6, then distributing the same information in the fabric will not

be possible to switches earlier than v5.3.0 because IPv6 is supported for Fabric OS version 5.3.0 and

later. The default value LOCL will be distributed to pre-5.3.0 switches.

The tsClockServer command accepts multiple server addresses in either IPv4, IPv6, or DNS name

formats. When multiple NTP server addresses are passed, tsClockServer sets the first obtainable

address as the active NTP server. The rest are stored as backup servers that can take over if the

active NTP server fails. The principal or primary FCS switch synchronizes its time with the NTP server

every 64 seconds.

Setting the date

1. Log into the switch using the default password, which is password .

2. Enter the date command , using the following syntax (the double quotation marks are required):

date "mmddHHMMyy"

The values are:

• mm is the month; valid values are 01 through 12.

• dd is the date; valid values are 01 through 31.

• HH is the hour; valid values are 00 through 23.

• MM is minutes; valid values are 00 through 59.

• yy is the year; valid values are 00 through 99 (values greater than 69 are interpreted as 1970

through 1999, and values less than 70 are interpreted as 2000-2069).

switch:admin> date

Fri Sep 29 17:01:48 UTC 2007

switch:admin> date "0927123007"

Local time synchronization

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