H3C Technologies H3C SecPath F1000-E - Manual (Page 123)

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To do… Use the command… Remarks
Enter system view system-view —
Configure the local clock as a
reference source ntp-service refclock-master
[ ip-address ] [ stratum ]
Required
NOTE:
•
Whether the
ntp-service refclock-master command is supported depends on your device model.
•
Typically, the stratum level of the NTP server which is synchronized from an authoritative clock
(such as an atomic clock) is set to 1. This NTP server operates as the primary reference source
on the network; and other devices synchronize themselves to it. The synchronization distances
between the primary reference source and other devices on the network, namely, the number of
NTP servers on the NTP synchronization paths, determine the clock stratum levels of the
devices.
•
If you have configured the local clock as a reference clock, the local device can act as a
reference clock to synchronize other devices in the network. Therefore, perform this
configuration with caution to avoid clock errors of the devices in the network.
•
In the
ntp-service refclock-master command, ip-address must be 127.127.1.u, where u ranges 0 to
3, representing the NTP process ID.
Configuring Optional Parameters of NTP
Specifying the Source Interface for NTP Messages
If you specify the source interface for NTP messages, the device sets the source IP address of the
NTP messages as the primary IP address of the specified interface when sending the NTP
messages.
When the device responds to an NTP request received, the source IP address of the NTP response
is always the IP address of the interface that received the NTP request.
Following these steps to specify the source interface for NTP messages:
To do… Use the command… Remarks
Enter system view system-view —
Specify the source interface for
NTP messages ntp-service source-interface
interface-type interface-number
Required
By default, no source interface is
specified for NTP messages, and
the system uses the IP address of
the interface determined by the
matching route as the source IP
address of NTP messages.