Timing And Synchronization Configuration Guide, Cisco IOS XE 16 ...

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Precision Time Protocol (PTP) is a protocol for distributing precise time and frequency over packet networks. PTP is defined in the IEEE Standard 1588. It defines an exchange of timed messages.

PTP allows for separate profiles to be defined in order to adapt PTP for use in different scenarios. A profile is a specific selection of PTP configuration options that are selected to meet the requirements of a particular application.

Effective Cisco IOS XE Everest 16.5.1, Cisco ASR 900 routers with RSP3 module support the ITU- T G.8275.2 telecom profile (PTP telecom profile for Phase/Time-of-day synchronization with partial timing support from the network).

The G.8275.2 is a PTP profile for use in telecom networks where phase or time-of-day synchronization is required. It differs from G.8275.1 in that it is not required that each device in the network participates in the PTP protocol. Also, G.8275.2 uses PTP over IPv4 and IPv6 in unicast mode. However, IPv6 is not supported in Cisco IOS XE Everest 16.5.1.

Note

In this document, G.8275.2 refers to ITU-T G.8275.2 (02/2016).

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