R3303-HP HSR6800 Routers Network Management and Monitoring Configuration Guide

# Display 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 CE 1, with the stratum level 2.

[PE2] display ntp-service status

Clock status: synchronized

Clock stratum: 2

Reference clock ID: 10.1.1.1

Nominal frequency: 63.9100 Hz

Actual frequency: 63.9100 Hz

Clock precision: 2^7

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)

[PE2] 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

[PE2] 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

Configuration example for MPLS VPN time synchronization in

symmetric peers mode

Network requirements

As shown in Figure 32, two VPNs are present on PE 1 and PE 2: VPN 1 and VPN 2. CE 1 and CE 3

belong to VPN 1. To synchronize the time between PE 1 and CE 1 in VPN 1, configure CE 1’s local clock

as a reference source, with the stratum level 1, configure CE 1 to operate in symmetric peers mode, and

specify VPN 1 as the target VPN.

Configuration procedure

1. Set the IP address for each interface as shown in Figure 32. (Details not shown.)

2. Configure CE 1:

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

<CE1> system-view

[CE1] ntp-service refclock-master 1

3. Configure PE 1:

# Specify CE 1 as the symmetric-passive peer for VPN 1.

<PE1> system-view

[PE1] ntp-service unicast-peer vpn-instance vpn1 10.1.1.1

# Display NTP session information and status information on PE 1 a certain period of time later.

The information should show that PE 1 has been synchronized to CE 1, with the stratum level 2.