115
Figure 46
Network diagram
Configuration procedure
Before you perform the following configuration, be sure you have completed MPLS L3VPN-related
configurations. For information about configuring MPLS L3VPN, see
MPLS Configuration Guide
.
1.
Assign an IP address to each interface, as shown in
. Make sure CE 1 and PE 1, PE 1
and PE 2, and PE 2 and CE 3 can reach each other. (Details not shown.)
2.
Configure CE 1:
# Enable the NTP service.
<CE1> system-view
[CE1] ntp-service enable
# Specify the local clock as the reference source, with stratum level 2.
[CE1] ntp-service refclock-master 2
3.
Configure PE 1:
# Enable the NTP service.
<PE1> system-view
[PE1] ntp-service enable
# Specify CE 1 in the VPN instance vpn1 as the symmetric-passive peer of PE 1.
[PE1] ntp-service unicast-peer 10.1.1.1 vpn-instance vpn1
4.
Verify the configuration:
# Verify that PE 1 has synchronized to CE 1, with stratum level 3.
[PE1] display ntp-service status
Clock status: synchronized
Clock stratum: 3
System peer: 10.1.1.1
Local mode: sym_active
Reference clock ID: 10.1.1.1
Leap indicator: 00
Clock jitter: 0.005096 s
Stability: 0.000 pps
Clock precision: 2^-18
Root delay: 0.00655 ms
CE 1
Symmetric passive peer
CE 2
CE 4
CE 3
PE 1
Symmetric
active peer
PE 2
P
VPN 1
VPN 2
VPN 1
VPN 2
10.1.1.1/24
10.3.1.1/24
MPLS backbone
10.1.1.2/24