H3C Technologies H3C SR8800 - Manual (Page 92)

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Figure 31 Network diagram
Device Interface IP address Device Interface IP address
CE 1 GE4/1/1 10.1.1.1/24 PE 1 GE4/1/1 10.1.1.2/24
CE 2 GE4/1/1 10.2.1.1/24 GE4/1/2 172.1.1.1/24
CE 3 GE4/1/1 10.3.1.1/24 GE4/1/3 10.2.1.2/24
CE 4 GE4/1/1 10.4.1.1/24 PE 2 GE4/1/1 10.3.1.2/24
P GE4/1/1 172.1.1.2/24 GE4/1/2 172.2.1.2/24
GE4/1/2 172.2.1.1/24 GE4/1/3 10.4.1.2/24
Configuration procedure
NOTE:
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 more information about MPLS VPN, see MPLS Configuration Guide.
1. Set the IP address for each interface as shown in Figure 31 . (Details not shown)
2. Configure CE 1:
# Specify the local clock as the reference source, with the stratum level of 1.
system-view
[CE1] ntp-service refclock-master 1
3. Configure CE 3:
# Specify CE 1 in VPN 1 as the NTP server of CE 3.
system-view
[CE3] ntp-service unicast-server 10.1.1.1
# View the NTP session information and status information on CE 3 a certain period of time later.
The information should show that CE 3 has been synchronized to CE 1, with the clock stratum level
of 2.
[CE3] display ntp-service status
Clock status: synchronized
Clock stratum: 2