Ruijie RG-S2900G-E Series, Руководство по настройке

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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:
Function Default
SNTP state Disabled.
IP address for the NTP server Null
SNTP Sync Interval 1800s
Local Time-zone GMT+8
Enabling SNTP
To enable SNTP, run the following commands in the global configuration mode:
Command Function