PTPv2 (EN)

Definition

PTPv2 is Version 2 of the Precision Time Protocol, standardized as IEEE 1588-2008, offering significant improvements over the first version. This version improves the accuracy, efficiency, and scalability of the protocol, especially in larger networks. PTPv2 supports extended features like Alternate Time-to-Live (altTTL) to prevent loops and improved mechanisms for error detection. Most modern PTP implementations are based on this version.

Architecture

flowchart TD     OC[Ordinary Clock] -->|Sync| GM[Grandmaster]     GM -->|Announce| OC     GM -->|Follow_Up| OC     OC -->|Delay_Req| BC[Boundary Clock]     BC -->|Delay_Resp| OC     BC -->|Sync| GM     GM -->|Announce| BC     GM -->|Follow_Up| BC 

In Context

• Typically used together with IEEE 802.1AS (gPTP)
• Related to: NTP, IRIG-B, SyncE
• Example use case: Synchronization of measurement devices in Smart Grids