Configuration Guide User guide

32 FastIron Configuration Guide
53-1002494-02
Configuring the device as an SNTP server
New start and end dates for US daylight saving time
NOTE
This feature applies to US time zones only.
The system will automatically change the system clock to Daylight Saving Time (DST), in compliance
with the new federally mandated start of daylight saving time, which is extended one month
beginning in 2007. The DST will start at 2:00am on the second Sunday in March and will end at
2:00am on the first Sunday in November.
The DST feature is automatic, but to trigger the device to the correct time, the device must be
configured to the US time zone, not the GMT offset. To configure your device to use the US time
zone, enter the clock timezone us pacific command.
Brocade(config)# clock timezone us pacific
Syntax: [no] clock timezone us <timezone-type>
Enter pacific, eastern, central, or mountain for <timezone-type>.
This command must be configured on every device that follows the US DST.
To verify the change, run a show clock command.
Brocade# show clock
Refer to October 19, 2006 - Daylight Saving Time 2007 Advisory, posted on kp.foundrynet.com for
more information.
Limiting broadcast, multicast, and unknown unicast traffic
Brocade devices can forward all flooded traffic at wire speed within a VLAN. However, some
third-party networking devices cannot handle high rates of broadcast, multicast, or
unknown-unicast traffic. If high rates of traffic are being received by the Brocade device on a given
port of that VLAN, you can limit the number of broadcast, multicast, or unknown-unicast packets or
bytes received each second on that port. This can help to control the number of such packets or
bytes that are flooded on the VLAN to other devices.
Broadcast, multicast, and unknown unicast configuration notes and feature
limitations
The following describes feature differences on FastIron devices: