Defining The Sntp Client Anycast Address - Patton electronics SmartNode Series Software Configuration Manual

20 • SNTP client configuration
Mode: Configure
Step
1 node (cfg)#sntp-client gmt-offset offset
Example: Setting SNTP client local time zone offset from GMT
In the following example the SNTP client local time zone offset is set to +2 hours ahead of GMT, e.g. for Swit-
zerland during Summer Time. Be aware that a space follows the + or – sign before the time offset is entered.
SN>enable
SN#configure
SN(cfg)#sntp-client gmt-offset + 02:00:00
There is a short form notation supported as shown in the following example.
SN(cfg)#sntp-client gmt-offset + 2
Defining the SNTP client anycast address
Anycast mode is designed for use with a set of cooperating servers whose addresses are not known beforehand
by the SmartNode. An anycast client (SmartNode) sends a request to the designated local broadcast or multi-
cast 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
238
Command
SmartWare Software Configuration Guide
Purpose
Specifies the SNTP client constant offset from GMT,
where offset is + or – followed by hh:mm:ss, with a
range from –24:00:00 to +24:00:00
SNTP client configuration task list