80
Clock offset: 0.0000 ms
Root delay: 47.00 ms
Root dispersion: 0.18 ms
Peer dispersion: 34.29 ms
Reference time: 02:36:23.119 UTC Jan 1 2001(BDFA6BA7.1E76C8B4)
[CE3] display ntp-service sessions
source reference stra reach poll now offset delay disper
**************************************************************************
[12345]10.1.1.1 LOCL 1 7 64 15 0.0 47.0 7.8
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 1
[CE3] display ntp-service trace
server 127.0.0.1,stratum 2, offset -0.013500, synch distance 0.03154
server 10.1.1.1,stratum 1, offset -0.506500, synch distance 0.03429
refid 127.127.1.0
Configuring MPLS VPN time synchronization in symmetric peers
mode example
Network requirements
As shown in Figure 31, two VPNs are present on PE 1 and PE 2: VPN 1 and VPN 2. To synchronize the
time between PE 1 and PE 2 in VPN 1, perform the following configurations:
• PE 1’s local clock is to be used as a reference source, with the stratum level of 1.
• PE 2 is synchronized to PE 1 in the symmetric peer mode, and specifies that the VPN instance is
VPN 1.
Configuration procedure
1. Set the IP address for each interface as shown in Figure 31. The configuration procedure is omitted.
2. Configuration on PE 2:
# Specify PE 1 in VPN 1 as the symmetric-passive peer of PE 2.
<PE2> system-view
[PE2] ntp-service unicast-peer vpn-instance vpn1 10.1.1.2
# View the NTP session information and status information on PE 2 a certain period of time later. The
information should show that PE 2 has been synchronized to PE 1, with the clock stratum level of 2.
[PE2] display ntp-service status
Clock status: synchronized
Clock stratum: 2
Reference clock ID: 10.1.1.2
Nominal frequency: 63.9100 Hz
Actual frequency: 63.9100 Hz
Clock precision: 2^7
Clock offset: 0.0000 ms
Root delay: 32.00 ms
Root dispersion: 0.60 ms
Peer dispersion: 7.81 ms
Reference time: 02:44:01.200 UTC Jan 1 2001(BDFA6D71.33333333)
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