Configuration Guide SNTP Configuration
T1: time request sent by client(refer to the client time) with the mark ―Originate
Timestamp‖;
T2: time request received at server(refer to the server time) with the mark
―Receive Timestamp‖;
T3: time reply by server(refer to the server time) with the mark ―Transmit
Timestamp ‖;
T4: time reply received at client(refer to the client time) with the mark
―Destination Timestamp‖.
T: time deviation between the Server and the Client
d: time between the Server and the Client
The following formula calculates the time:
∵ T2 = T1 + t + d / 2;
∴ T2 - T1 = t + d / 2;
∵ T4 = T3 – t + d / 2;
∴ T3 - T4 = t – d / 2;
∴ d = (T4 - T1) - (T3 - T2);
t = ((T2 - T1) + (T3 - T4)) / 2;
Then, according to the value of t and d, SNTP Client gets the current time: T4+t.
Configuring SNTP
This chapter describes how to configure the SNTP.
Default Configuration
By default, the SNTP configurations are as follows:
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