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FAQ - What Are Transmission Intervals for NTP Packets

Publication Date:  2013-09-24 Views:  32 Downloads:  0
Issue Description
What are transmission intervals for NTP packets in unicast server/client mode, unicast peer mode, broadcast mode, and multicast mode?
Handling Process
None
Root Cause
None
Solution

1. Unicast server/client mode

A client sends eight packets to the server within a short time and then one packet every 64s. After determining that the server is stable, the client sends one packet every 128s to the server according to the NTP algorithm. After determining that the server is still stable, the client sends one packet every 256s, and then finally every 1024s if the server keeps stable.

Contrarily, if the client considers that the server becomes unstable when sending one packet every 512s, it sends one packet every 256s.

The transmission interval algorithm is unconfigurable. The synchronization intervals cannot be manually changed.

2. Unicast peer mode

A client sends eight packets to the peer within a short time and then one packet every 64s.

3. Broadcast mode

A client sends eight packets to the server within a short time and then one broadcast packet every 64s.

4. Multicast mode

A client sends eight packets to the server within a short time and then one multicast packet every 64s.
Suggestions
None

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