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S12700 V200R010C00 Configuration Guide - Device Management

This document describes the principles and configurations of the Device Management features, and provides configuration examples of these features.
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Configuring PTP on a TCandBC

Configuring PTP on a TCandBC

TCandBC Deployment

In Figure 5-12, all devices on the bearer network and NodeBs support PTP. CarrierA has NodeBs and a BITS standard clock source BITS2, but does not have bearer network devices. CarrierB leases its bearer network to CarrierA. Devices on the bearer network synchronize with the BITS standard clock source BITS1 of CarrierB. To ensure that clock synchronization is implemented independently on devices of CarrierA and CarrierB, you can deploy the network as follows:
  • BC1 and OC1 connect to BITS1 and BITS2 respectively, and send clock synchronization information to downstream devices through PTP messages.
  • TCandBC1 directly connects to BC1 through a BC interface and participates in clock synchronization in Domain 1. The user-side interface of TCandBC1 is a TC interface.
  • TCandBC2 directly connects to BC1 through a BC interface and participates in clock synchronization in Domain 1. The user-side interface of TCandBC2 is a TC interface.
  • Interfaces that directly connect TCandBC2 to OC2, TCandBC2 to TCandBC1, and TCandBC1 to OC1 provide the TC function. OC2 receives PTP messages sent from TCandBC1 through the PW channel between TCandBC1 and TCandBC2, synchronizes clock information with TCandBC1, and then sends clock information to NodeB using traditional synchronization methods such as synchronous Ethernet.
  • The bearer network has two PTP domains: Domain 1 and Domain 2. All devices in Domain 1 function as BCs to implement PTP synchronization and transmit messages between TCandBC1 and TCandBC2. For Domain 2, the entire bearer network functions as a large TC, which transparently transmits BITS2 clock information to NodeB.
Figure 5-12  Configuring PTP on a TCandBC

Pre-configuration Tasks

Before configuring PTP on a TCandBC, complete the following tasks:

  • Set link layer protocol parameters for interfaces to ensure that the link layer protocol status of the interfaces is Up.

  • Ensure that the OC1 and OC2 correctly receive clock and time signals from the BITS device.

Configuration Process

The process of configuring PTP on a TCandBC is as follows.

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Updated: 2019-08-21

Document ID: EDOC1000142080

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