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SNTP client configuration task list 287
SmartWare Software Configuration Guide 26 • SNTP client configuration
Defining SNTP client constant offset to GMT
Setting the offset of the device local time zone from Greenwich Mean Time is required if the local time shall be
used for time dependent routing decisions or other reasons. Greenwich Mean Time (GMT) is also known as
Zulu Time and Universal Time Coordinated (UTC), refer to http://greenwichmeantime.com/ for more details
and information about your time zone and offset to GMT.
Note Be aware that summertime offset is not automatically adjusted!
Use the “clock local offset” command to configure the local clock offset.
This procedure describes how to display the local time.
Mode: Configure
This procedure describes how to use the clock local offset command.
Mode: Configure
Defining the SNTP client anycast address
Anycast mode is designed for use with a set of cooperating servers whose addresses are not known beforehand.
An anycast client sends a request to the designated local broadcast or multicast group address as described
below. For this purpose, the NTP multicast group address assigned by the IANA is used. One or more anycast
servers listen on the designated local broadcast address or multicast group address. Each anycast server, upon
receiving a request, sends a unicast reply message to the originating client. The client then binds to the first
such message received and continues operation in unicast mode. Subsequent replies from other anycast servers
are ignored.
In anycast mode, the SmartNode sends a request to a designated local broadcast or multicast group address and
expects a reply from one or more anycast servers. The SmartNode uses the first reply received to establish the
particular server for subsequent unicast operations. Later replies from this server (duplicates) or any other
server are ignored.
Other than the selection of address in the request, the operations of anycast and unicast clients are identical.
This procedure describes how to set local broadcast address or multicast group address to which the anycast
request is sent
Step Command Purpose
1 [name]#show clock local Displays the local time, UTC and the offset of the local
time from UTC.
Step Command Purpose
1 [name](cfg)#clock local offset (+|-
)hh:mm
Sets the offset from UTC to local time.