R3303-HP HSR6800 Routers Network Management and Monitoring Configuration Guide

local clock as a reference source, with the stratum level 1, configure CE 1 to operate in client/server

mode, and specify VPN 1 as the target VPN.

MPLS L3VPN time synchronization can be implemented only in the unicast mode (client/server mode or

symmetric peers mode), but not in the multicast or broadcast mode.

Figure 32 Network diagram

Device Interface IP address

Device

Interface IP address

CE 1 GE2/0/0 10.1.1.1/24 PE 1 GE2/0/0 10.1.1.2/24

CE 2

CE 3

GE2/0/0

10.2.1.1/24

10.3.1.1/24

GE2/0/1

GE2/0/2

172.1.1.1/24

10.2.1.2/24

CE 4 GE2/0/0 10.4.1.1/24

PE 2

GE2/0/0 10.3.1.2/24

P GE2/0/0 172.1.1.2/24

GE2/0/1 172.2.1.2/24

GE2/0/1 172.2.1.1/24 GE2/0/2 10.4.1.2/24

Configuration procedure

Before you perform the following configuration, be sure you have completed MPLS VPN-related

configurations and make sure of the reachability between CE 1 and PE 1, between PE 1 and PE 2, and

between PE 2 and CE 3. For information about configuring MPLS VPN, see MPLS Configuration Guide.

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 2:

# Specify CE 1 as the NTP server for VPN 1.

<PE2> system-view

[PE2] ntp-service unicast-server vpn-instance vpn1 10.1.1.1