Netgear XCM8806 - 8800 SERIES 6-SLOT CHASSIS SWITCH ユーザーズマニュアル

broadcast NTP updates. In addition, the switch supports the configured setting for Greenwich 
Mean time (GMT) offset and the use of Daylight Saving Time. 

Configuring and Using SNTP

To use SNTP:

Identify the host(s) that are configured as NTP server(s). Additionally, identify the 
preferred method for obtaining NTP updates. The options are for the NTP server to send 
out broadcasts or for switches using NTP to query the NTP server(s) directly. A 
combination of both methods is possible. You must identify the method that should be 
used for the switch being configured.

Configure the Greenwich Mean Time (GMT) offset and Daylight Saving Time preference. 
The command syntax to configure GMT offset and usage of Daylight Saving Time is as 
follows:

configure timezone {name <tz_name>} <GMT_offset> 



{autodst {name <dst_timezone_ID>} {<dst_offset>} 



{begins [every <floatingday> | on <absoluteday>] {at <time_of_day_hour> 

<time_of_day_minutes>} 



{ends [every <floatingday> | on <absoluteday>] {at <time_of_day_hour> 

<time_of_day_minutes>}}}

By default beginning in 2007, Daylight Saving Time is assumed to begin on the second 
Sunday in March at 2:00 AM, and end the first Sunday in November at 2:00 AM and to be 
offset from standard time by one hour. If this is the case in your time zone, you can set up 
automatic daylight saving adjustment with the command:

configure timezone <GMT_offset> autodst

If your time zone uses starting and ending dates and times that differ from the default, you 
can specify the starting and ending date and time in terms of a floating day, as follows:

configure timezone name MET 60 autodst name MDT begins every last sunday march at 

1 30 ends every last sunday october at 1 30

You can also specify a specific date and time, as shown in the following command: 

configure timezone name NZST 720 autodst name NZDT 60 begins every first sunday 

october at 2 00 ends on 3 16 2004 at 2 00

The optional time zone IDs are used to identify the time zone in display commands such 
as 

show switch {detail}

. 

 describes the command options in detail.

tz_name

Specifies an optional name for this timezone specification. May be up to six characters 
in length. The default is an empty string. 

GMT_offset

Specifies a Greenwich Mean Time (GMT) offset, in + or - minutes. 

autodst

Enables automatic Daylight Saving Time.