H3C Technologies H3C MSR 5600 - Manual (Page 112)

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Figure 38 Network diagram
Device Interface IP address Device Interface IP address
CE 1 S2/0 10.1.1.1/24 PE 1 S2/0 10.1.1.2/24
CE 2
CE 3 S2/0
S2/0 10.2.1.1/24
10.3.1.1/24 S2/1
S2/2
172.1.1.1/24
10.2.1.2/24
CE 4 S2/0 10.4.1.1/24 PE 2 S2/0 10.3.1.2/24
P S2/0 172.1.1.2/24 S2/1 172.2.1.2/24
S2/1 172.2.1.1/24 S2/2 10.4.1.2/24
Configuration procedure
Prior to performing 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 38 . (Details not shown.)
2. Configure CE 1:
# Enable the NTP service.
system-view
[CE1] ntp-service enable
# Specify the local clock as the reference source, with the stratum level 2.
[CE1] ntp-service refclock-master 2
3. Configure PE 2:
# Enable the NTP service.
system-view
[PE2] ntp-service enable
# Specify CE 1 in VPN 1 as the NTP server of PE 2.
[PE2] ntp-service unicast-server 10.1.1.1 vpn-instance vpn1
4. Verify the configuration:
# Display the IPv4 NTP association information and status 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 3.
[PE2] display ntp-service status
CE 1
CE 2 CE 4
CE 3
PE 1 PE 2 P
VPN 1
VPN 2
VPN 1
VPN 2
S2/0
S2/0
S2/2
S2/0
S2/1 S2/1
S2/0 S2/0
S2/0
S2/0
S2/2
S2/1
MPLS backbone