NTP symmetric active/passive mode configuration example

As shown in Figure 37, perform the following tasks:

• Configure the local clock of Device A as a reference source, with stratum level 2.

• Configure Device A to operate in symmetric-active mode and specify Device B as the passive peer of Device A.

1. Assign an IP address to each interface, and make sure Device A and Device B can reach each other, as shown in Figure 37. (Details not shown.)

2. Configure Device B:

   # Enable the NTP service.

   <DeviceB> system-view
   [DeviceB] ntp-service enable
   

3. Configure Device A:

   # Enable the NTP service.

   <DeviceA> system-view
   [DeviceA] ntp-service enable
   

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

   [DeviceA] ntp-service refclock-master 2
   

   # Configure Device B as a symmetric passive peer.

   [DeviceA] ntp-service unicast-peer 3.0.1.32
   

4. Verify the configuration:

   # Verify that Device B has synchronized to Device A.

   [DeviceB] display ntp-service status
    Clock status: synchronized
    Clock stratum: 3
    System peer: 3.0.1.31
    Local mode: sym_passive
    Reference clock ID: 3.0.1.31
    Leap indicator: 00
    Clock jitter: 0.000916 s
    Stability: 0.000 pps
    Clock precision: 2^-18
    Root delay: 0.00609 ms
    Root dispersion: 1.95859 ms
    Reference time: 83aec681.deb6d3e5  Wed, Jan  8 2014 14:33:11.081
   

   # Verify that an IPv4 NTP association has been established between Device B and Device A.

   [DeviceB] display ntp-service sessions
          source          reference       stra reach poll  now offset  delay disper
   ********************************************************************************
      [12]3.0.1.31        127.127.1.0        2    62   64   34 0.4251 6.0882 1392.1
   Notes: 1 source(master), 2 source(peer), 3 selected, 4 candidate, 5 configured.
    Total sessions: 1