Operation Manual - System Management 
Quidway S3500 Series Ethernet Switches  Chapter 7  NTP Configuration
 
Huawei Technologies Proprietary 
7-8 
7.2.5  Designate an Interface to Transmit NTP Message 
If the local equipment is configured to transmit all the NTP messages, these packets 
will have the same source IP address, which is taken from the IP address of the 
designated interface.  
Perform the following configurations in system view.  
Table 7-10 Designate an interface to transmit NTP message 
Operation  Command 
Designate an interface to transmit NTP 
message
 
ntp-service source-interface 
{  interface-name | interface-type 
interface-number }
 
Cancel the interface to transmit NTP 
message
 
undo ntp-service source-interface
 
 
An interface is specified by interface-name or interface-type interface-number. The 
source address of the packets will be taken from the IP address of the interface. If the 
ntp-service unicast-server or ntp-service unicast-peer command also designates a 
transmitting interface, use the one designated by them.  
7.2.6  Set NTP Master Clock 
This configuration task is to set the external reference clock or the local clock as the 
NTP master clock.   
Perform the following configurations in system view.  
Table 7-11 Set the external reference clock or the local clock as the NTP master clock 
Operation  Command 
Set the external reference clock or the 
local clock as the NTP master clock.
 
ntp-service refclock-master 
[ ip-address ] [ stratum ]
 
Cancel the NTP master clock settings 
undo ntp-service refclock-master 
[ ip-address ]
 
 
ip-address specifies the IP address 127.127.t.u of a reference clock, in which t ranges 
from 0 to 37 and u from 0 to 3. stratum specifies how many stratums the local clock 
belongs to and ranges from 1 to 15. If no IP address is specified, the system defaults to 
setting the local clock as the NTP master clock. You can specify the stratum parameter. 
7.2.7  Enable/Disable an Interface to Receive NTP Message 
This configuration task is to enable/disable an interface to receive NTP message.  
Perform the following configurations in VLAN interface view.