H3C Technologies H3C S3600 Series Switches - Manual (Page 881)

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Configuring an Interface on the Local Switch to Send NTP messages
Follow these steps to configure an interface on the local switch to send NTP messages:
To do… Use the command… Remarks
Enter system view system-view —
Configure an interface on the local switch
to send NTP messages ntp-service source-interface
Vlan-interface vlan-id
Required
If you have specified an interface in the ntp-service unicast-server or ntp-service unicast-peer
command, this interface will be used for sending NTP messages.
Configuring the Number of Dynamic Sessions Allowed on the Local Switch
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, 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.
Follow these steps to configure the number of dynamic sessions allowed on the local switch:
To do… Use the command… Remarks
Enter system view system-view —
Configure the maximum
number of dynamic sessions
that can be established on the
local switch
ntp-service
max-dynamic-sessions
number
Required
By default, up to 100 dynamic
sessions can be established
locally.
Disabling an Interface from Receiving NTP messages
Follow these steps to disable an interface from receiving NTP messages:
To do… Use the command… Remarks
Enter system view system-view —
Enter VLAN interface view
interface Vlan-interface
vlan-id
—