3com S7906E Installation Instruction

 

1-18 

[DeviceB] display ntp-service sessions 

      source      reference   stra  reach  poll  now  offset  delay  disper 

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[12345] 1.0.1.11  127.127.1.0    2    63    64    3    -75.5    31.0  16.5 

note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured 

Total associations :  1 

z 

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

z 

Device B works in the client mode and Device A is to be used as the NTP server of Device B. 

z 

Device C works in the symmetric-active mode and Device B will act as peer of Device C. Device C 

is the symmetric-active peer while Device B is the symmetric-passive peer. 

Figure 1-8 Network diagram for NTP symmetric peers mode configuration 

Switch A

Switch B

Switch C

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3.0.1.33/24

 

 

1)  Configuration on Device A:  

# Specify the local clock as the reference source, with the stratum level of 2.  

<DeviceA> system-view 

[DeviceA] ntp-service refclock-master 2 

2)  Configuration on Device B:  

# Specify Device A as the NTP server of Device B.  

<DeviceB> system-view 

[DeviceB] ntp-service unicast-server 3.0.1.31 

3)  Configuration on Device C (after Device B is synchronized to Device A): 

# Specify the local clock as the reference source, with the stratum level of 1.  

<DeviceC> system-view 

[DeviceC] ntp-service refclock-master 1 

# Configure Device B as a symmetric peer after local synchronization.  

[DeviceC] ntp-service unicast-peer 3.0.1.32