3Com WX3000 operation manual Configuring the NTP Symmetric Peer Mode

To do…		Use the command…	Remarks
Enter system view		system-view	—
		ntp-service unicast-server { remote-ip	Required
Configure an NTP client	server-name} [ authentication-keyid		By default, the device is
		key-idpriority source-interface
			not configured to work in
		Vlan-interface vlan-idversion
			the NTP client mode.
		number ]*

z

z z

z

z

The remote server specified by remote-ipor server-nameserves as the NTP server, and the local device serves as the NTP client. The clock of the NTP client will be synchronized by but will not synchronize that of the NTP server.

remote-ipcannot be a broadcast address, a multicast address or the IP address of the local clock. After you specify an interface for sending NTP messages through the source-interfacekeyword, the source IP address of the NTP message will be configured as the primary IP address of the specified interface.

The device can act as a server to synchronize the clock of other devices only after its clock has been synchronized. If the clock of a server has a stratum level lower than or equal to that of a client’s clock, the client will not synchronize its clock to the server’s.

You can configure multiple servers by repeating the ntp-serviceunicast-servercommand. The client will choose the optimal reference source.

Configuring the NTP Symmetric Peer Mode

For devices working in the symmetric peer mode, you need to specify a symmetric-passive peer on the symmetric-active peer.

Follow these steps to configure a symmetric-active switch:

To do…	Use the command…	Remarks
Enter system view	system-view	—
	ntp-service unicast-peer	Required
Specify a symmetric-passive	{ remote-ip peer-name }
	[ authentication-keyid key-id	By default, the device is not
peer for the device	priority source-interface	configured to work in the
	Vlan-interface vlan-id	symmetric mode.
	version number ]*

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