R2511-HP MSR Router Series Network Management and Monitoring Configuration Guide(V5)

Clock precision: 2^7

Clock offset: 0.0000 ms

Root delay: 31.00 ms

Root dispersion: 1.05 ms

Peer dispersion: 7.81 ms

Reference time: 14:53:27.371 UTC Sep 19 2005 (C6D94F67.5EF9DB22)

The output shows that Device B has synchronized to Device A. The stratum level of Device B is 3,

and that of Device A is 2.

# Display NTP session information for Device B, which shows that an association has been set up

between Device B and Device A.

[DeviceB] display ntp-service sessions

source reference stra reach poll now offset delay disper

**************************************************************************

[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

NTP symmetric peers mode configuration example

Network requirements

Perform the following configurations to synchronize time among devices:

• As shown in Figure 18,

the local clock of Device A is to be configured as a reference source, with

the stratum level 2.

• The local clock Device C is to be configured as a reference source, with the stratum level 1.

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

• Device C operates in symmetric-active mode and Device B acts as the peer of Device C.

Figure 18 Network diagram

Configuration procedure

1. Set the IP address for each interface as shown in Figure 18. (Details not shown.)

2. Configure Device A:

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

<DeviceA> system-view

[DeviceA] ntp-service refclock-master 2