3com S7906E Instruccion De Instalación

 

1-12 

z 

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. 

z 

After 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. 

z 

In this command, ip-address must be 127.127.1.u, where u ranges 0 to 3, representing the NTP 

process ID. 

 

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: 

Enter 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. 

 

z 

If you have specified the source interface for NTP messages in the ntp-service unicast-server or 

ntp-service unicast-peer command, the interface specified in the ntp-service unicast-server or 

ntp-service unicast-peer command serves as the source interface of NTP messages. 

z 

If you have configured the ntp-service  broadcast-server or ntp-service  multicast-server 

command, the source interface of the broadcast or multicast NTP messages is the interface 

configured with the respective command.