H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – NTP
H3C S7500E Series Ethernet Switches Chapter 1 NTP Configuration
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 Note:
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.
1.2.1 Configuring NTP Server/Client Mode
For devices working in the server/client mode, you only need to make configurations on
the clients, and not on the servers.
Follow these steps to configure an NTP client:
To do… Use the command… Remarks
Enter system view
system-view
—
Specify an NTP
server for the device
ntp-service unicast-server { ip-address |
server-name } [ authentication-keyid
keyid | priority | source-interface
interface-type interface-number | version
number ] *
Required
No NTP
server is
specified by
default.