Ntp Configuration Task List; Configuring The Operation Modes Of Ntp; Configuring Ntp Client/Server Mode - HP 5820X Switch Configuration Manual

NOTE:
• A CE is a device that has an interface directly connecting to the SP. A CE is not "aware of" the
presence of the VPN.
A PE is a device directly connecting to CEs. In an MPLS network, all events related to VPN processing
•
occur on the PE.

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
Configuring the operation modes of NTP
Devices can implement clock synchronization in one of the following modes:
Client/server mode
•
Symmetric mode
•
Broadcast mode
•
• Multicast mode
For the client/server mode or symmetric mode, you must configure only clients or symmetric-active peers;
for the broadcast or multicast mode, you must configure both servers and clients.
NOTE:
A single device 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.
A dynamic association is a temporary association created by the system during operation. A dynamic
•
association is removed if the system fails to receive messages from it over a specific long time.
In client/server mode, for example, when you execute a command to synchronize the time to a server,
the system creates a static association, and the server just responds passively upon the receipt of a
message, rather than creating an association (static or dynamic). In symmetric mode, static associations
are created at the symmetric-active peer side, and dynamic associations are created at the symmetric-
passive peer side. In broadcast or multicast mode, static associations are created at the server side, and
dynamic associations are created at the client side.

Configuring NTP client/server mode

For devices working in client/server mode, make configurations on the clients, but not on the servers.
Remarks
Required
Optional
Optional
Optional
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