3com 5500 User Manual

C

HAPTER

 31: NTP C

ONFIGURATION

 G

UIDE

[DeviceB] display ntp-service sessions 

#

ntp-service unicast-server 1.0.1.11 

The local clock of a 3Com Switch 5500, 5500G, or 4210 cannot be set as a 
reference clock. It can synchronize other devices as a reference clock only when its 
clock is synchronized.

Figure 83   Network diagram for NTP symmetric peers mode configuration

 

■

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

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Device C is a Switch 5500 which takes Device A as the time server, and Device 
A automatically works in the server mode.

■

The local clock of Device B is to be used as a reference source, with the stratum 
level of 1. Set Device B to take Device C as the symmetric-peer.

■

Configure Device C.

# Set Device A as the time server.

<DeviceC> system-view

[DeviceC] ntp-service unicast-server 3.0.1.31 

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Configure Device B (after Device C is synchronized to Device A).

Device A

Device B

Device C

3.0 .1.31/24

3.0.1.32/24

3 .0.1.33/24

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