SNTP client is included in the system package. RouterOS implements SNTP protocol defined in RFC4330. Manycast mode is not supported. NTP server and a NTP client is included in the separate ntp package, that is not installed by default.
Client configuration is located in the /system ntp client console path, and the "System > NTP Client" WinBox window. This configuration is shared by the SNTP client implementation in the system package and the NTP client implementation in the ntp package. When ntp package is installed and enabled, the SNTP client is disabled automatically.
enabled (yes or no; default value: no)
mode (One of broadcast or unicast; default value: broadcast) : In broadcast mode, client does not send any requests, and listens for the broadcast messages sent by the NTP server. In unicast mode client periodically sends requests to the currently selected active server, and waits for a reply message from that server.
primary-ntp, secondary-ntp (IP address) : IP addresses of the NTP servers. These properties have effect only when mode=unicast. Value 0.0.0.0 is ignored. If both values are zero and mode is unicast then SNTP client is disabled. If both values are non-zero, then SNTP client will alternate between the two server addresses, switching to the other when request to the current server times out or when the "KoD" packet is received, indicating that server is not willing to respond to requiests from this client.
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/system ntp client