H3C Technologies H3C SecPath F1000-E - Manual (Page 119)

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clock errors of the devices in the network.
To configure the local clock as a reference source:
Step Command Remarks
1. Enter system view. system-view N/A
2. Configure the local clock as a
reference source. ntp-service refclock-master
[ ip-address ] [ stratum ]
The ip-address argument must be
127.127.1.u, where u ranges
from 0 to 3, representing the NTP
process ID.
Configuring optional NTP parameters
Specifying the source interface for NTP messages
Configuration guidelines
• The source interface for NTP unicast messages is the interface specified in the ntp-service
unicast-server or ntp-service unicast-peer command.
• The source interface for NTP broadcast or multicast messages is the interface where you configure
the ntp-service broadcast-server or ntp-service multicast-server command.
• If the specified source interface for NTP messages is down, the source IP address for an NTP
message that is sent out is the primary IP address of the outgoing interface of the NTP message.
• 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.
To specify the source interface for NTP messages:
Step Command Remarks
1. Enter system view. system-view N/A
2. Specify the source interface
for NTP messages. ntp-service source-interface
interface-type interface-number
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.
Disabling an interface from receiving NTP messages
When NTP is enabled, NTP messages can be received from all the interfaces by default, and you can
disable an interface from receiving NTP messages through the following configuration.
Step Command Remarks
1. Enter system view. system-view N/A