3Com 4200G, 5500G, 4210 manual NTP Configuration Guide, NTP Client/Server, Mode Configuration

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NTP CONFIGURATION GUIDE

NTP Client/Server	Defined in RFC 1305, the Network Time Protocol (NTP) synchronizes timekeeping
Mode Configuration	among distributed time servers and clients. NTP runs over the User Datagram
	Protocol (UDP), using UDP port 123.
	The purpose of using NTP is to keep consistent timekeeping among all
	clock-dependent devices within the network so that the devices can provide
	diverse applications based on the consistent time.
	For a local system running NTP, its time can be synchronized by other reference
	sources and can be used as a reference source to synchronize other clocks.
Network Diagram	Figure 82 Network diagram for NTP client/server mode configuration
	1.0.1.11/24	1.0.1.12/24

Networking and

Configuration

Requirements

Device A Device B

■The local clock of Device A (switch) is to be used as a reference source, with the stratum level of 2.

■Device B is a Switch 5500, which takes Device A as the time server.

■Set Device B to work in the client mode, and Device A will automatically work in the server mode.

Applicable Products

Product series	Software version	Hardware version
Switch 5500	Release V03.02.04	All versions
Switch 5500G	Release V03.02.04	All versions
Switch 4500	Release V03.03.00	All versions
Switch 4210	Release V03.01.00	All versions

Configuration Procedure # Set Device B to take Device A as the time server.

<DeviceB> system-view

[DeviceB] ntp-service unicast-server 1.0.1.11

# View NTP status of Device B.

[DeviceB] display ntp-service status

# View NTP session information of Device B.