Ntp Configuration Task List; Configuring The Operation Modes Of Ntp - H3C S5500-EI series Operation Manual

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Operation Manual – NTP

H3C S5500-EI Series Ethernet Switches

1.2 NTP Configuration Task list

Complete the following tasks to configure NTP:

Configuring Optional Parameters of NTP

Configuring Access-Control Rights

Configuring NTP Authentication

1.3 Configuring the Operation Modes of NTP

Switches can implement clock synchronization in one of the following modes:

Server/client mode

Symmetric mode

Broadcast mode

Multicast mode

For the server/client mode or symmetric mode, you need to configure only clients or

symmetric-active peers; for the broadcast or multicast mode, you need to configure

both servers and clients.

A single switch can have a maximum of 128 associations at the same time, including

static associations and dynamic associations. A static association refers to an

association that a user has manually created by using an NTP command, while a

dynamic association is a temporary association created by the system during operation.

A dynamic association will be removed if the system fails to receive messages from it

over a specific long time. In the server/client mode, for example, when you carry out a

command to synchronize the time to a server, the system will create a static association,

and the server will just respond passively upon the receipt of a message, rather than

creating an association (static or dynamic). In the symmetric mode, static associations

will be created at the symmetric-active peer side, and dynamic associations will be

created at the symmetric-passive peer side; In the broadcast or multicast mode, static

associations will be created at the server side, and dynamic associations will be

created at the client side.

Chapter 1 NTP Configuration

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