3Com 10014298 Setting the NTP Master Clock, Designating an Interface to Transmit NTP Message

284CHAPTER 11: SYSTEM MANAGEMENT

Perform the following configurations in system view.

Table 328 Designating an Interface to Transmit NTP Message

Operation	Command
Designate an interface to transmit NTP	ntp-service source-interface {
message	interface-name interface-type
	interface-number }
Cancel the interface to transmit NTP message	undo ntp-service source-interface

An interface is specified by interface-nameor interface-typeinterface-number. The source address of the packets will be taken from the IP address of the interface. If the ntp-serviceunicast-serveror ntp-serviceunicast-peercommand also designates a transmitting interface, use the one designated by them.

Setting the NTP Master Clock

This configuration task sets the external reference clock or the local clock as the

NTP master clock.

Perform the following configurations in system view.

Table 329 Setting the External Reference Clock or the Local Clock as the NTP Master

Clock

Operation	Command
Set the external reference clock or the local	ntp-service refclock-master [
clock as the NTP master clock.	ip-address ] [ stratum ]
Cancel the NTP master clock settings	undo ntp-service refclock-master
	[ ip-address ]

ip-addressspecifies the IP address 127.127.1.u of a reference clock, in which u ranges from 0 to 3. stratum specifies how many strata 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.

Enabling or Disabling an Interface to Receive an NTP Message

This configuration task enables or disables an interface to receive the NTP message.

Perform the following configurations in VLAN interface view.

Table 330 Enabling or Disabling an Interface to Receive an NTP Message

Operation	Command
Enable an interface to receive an NTP message	undo ntp-service in-interface
	disable
Disable an interface from receiving an NTP	ntp-service in-interface disable
message

This configuration task must be performed on the interface to be disabled from receiving an NTP message.