78
Clock offset: 0.0000 ms
Root delay: 31.00 ms
Root dispersion: 8.31 ms
Peer dispersion: 34.30 ms
Reference time: 16:01:51.713 UTC Sep 19 2005 (C6D95F6F.B6872B02)
The output shows that Switch D has been synchronized to Switch C, and the clock stratum level of Switch
D is 4, while that of Switch C is 3.
# View the NTP session information of Switch D, which shows that an association has been set up
between Switch D and Switch C.
[SwitchD-Vlan-interface2] display ntp-service sessions
source reference stra reach poll now offset delay disper
**************************************************************************
[1234] 3.0.1.31 127.127.1.0 3 254 64 62 -16.0 32.0 16.6
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations : 1
Configuring MPLS VPN time synchronization in client/server
mode example
Network requirements
As shown in Figure 31, two VPNs are present on PE 1 and PE 2: VPN 1 and VPN 2. CE 1 and CE 3 are
devices in VPN 1. To synchronize the time between CE 1 and CE 3 in VPN 1, perform the following
configurations:
• CE 1’s local clock is to be used as a reference source, with the stratum level of 1.
• CE 3 is synchronized to CE 1 in the client/server mode.
NOTE:
MPLS VPN time synchronization can only be implemented in the unicast mode (client/server mode or
symmetric peers mode), but not in the multicast or broadcast mode.
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