NTP for VPNs

The device supports multiple VPN instances when it functions as an NTP client or a symmetric active peer to realize clock synchronization with the NTP server or symmetric passive peer in an MPLS VPN network. For more information about MPLS L3VPN, VPN instance, and PE, see MPLS Configuration Guide.

As shown in Figure 11, users in VPN 1 and VPN 2 are connected to the MPLS backbone network through provider edge (PE) devices, and services of the two VPNs are isolated. If you configure the PEs to operate in NTP client or symmetric active mode, and if you specify the VPN to which the NTP server or NTP symmetric passive peer belongs, the clock synchronization between PEs and CEs of the two VPNs can be realized. The switch series can only operate as CEs.