Brocade Communications Systems Brocade 6520, Справочное руководство

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12 Brocade 6520 Hardware Reference Manual
53-1002705-01
Brocade 6520 configuration
2
DRAFT: BROCADE CONFIDENTIAL
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"
Thu Sep 27 12:30:00 UTC 2007
switch:admin>