Ntp Configuration Task List - H3C S3100V2-52TP Configuration Manual

Clients listen to the broadcast messages from servers. When a client receives the first broadcast
2.
message, the client and the server start to exchange messages with the Mode field set to 3 (client
mode) and 4 (server mode), to calculate the network delay between client and the server.
Then the client enters broadcast client mode. The client continues listening to broadcast messages,
3.
and synchronizes its local clock based on the received broadcast messages.
Multicast mode
Figure 10 Multicast mode
In multicast mode:
A server periodically sends clock synchronization messages to the user-configured multicast
1.
address, or, if no multicast address is configured, to the default NTP multicast address 224.0.1.1,
with the Mode field in the messages set to 5 (multicast mode).
Clients listen to the multicast messages from servers. When a client receives the first multicast
2.
message, the client and the server start to exchange messages with the Mode field set to 3 (client
mode) and 4 (server mode), to calculate the network delay between client and server.
Then, the client enters multicast client mode. It continues listening to multicast messages, and
3.
synchronizes its local clock based on the received multicast messages.
NOTE:
In symmetric peers mode, broadcast mode and multicast mode, the client (or the symmetric active peer)
and the server (the symmetric passive peer) can work in the specified NTP working mode only after they
exchange NTP messages with the Mode field being 3 (client mode) and the Mode field being 4 (server
mode). During this message exchange process, NTP clock synchronization can be implemented.

NTP configuration task list

Complete the following tasks to configure NTP:
Task
Configuring the operation modes of NTP
Configuring optional parameters of NTP
Configuring access-control rights
Configuring NTP authentication
Remarks
14
Required
Optional
Optional
Optional