Overview

This is not a new version!!!!

• This is not IEEE1588 v3, it is v2.1

• Everything that works with IEEE1588-2008 today will work IEEE1588 v2.1

IEEE1588-2018 will be a set of new, optional features asked for by particular industry groups:

• Slave Event Monitoring

• Special Ports

• Mixed Multicast/Unicast Operation

• Modular Transparent Clock

• Security

• Inter-domain interactions

• Profile Isolation

• High accuracy features (based on White Rabbit from CERN)

Slave Timing Measurement

Provides a way of monitoring the status and time at a slave clock

• Useful for slaves that have no separate timing output

Slave reports a TLV containing the timing of event messages relative to the slave local clock time

Open

Special Ports

Interfaces PTP to timing ports on other technologies

• Examples: 1pps/ToD, Microwave, WiFi, EPON

Open

Note: Diagram taken from Doug Arnold's presentation at ITSF 2017 (Meinberg)

Other Interesting Features

Mixed Multicast/Unicast Operation

• Sync, Announce messages are multicast

• Delay_Request, Delay_Response are unicast

Modular Transparent Clocks

• Separate “ingress” and “egress” TCs, e.g. built into SFP modules

Security TLV

• Uses PTP over IPsec and MACsec

• Security TLV can be attached to any PTP message

• Key exchange details outside the scope of IEEE1588

Inter-domain Interaction

• Allows creation of robust synchronization networks by using three or four separate clock domains

High Accuracy PTP

• Based on CERN’s “White Rabbit” extensions to PTP

• Achieves sub-ns phase synchronisation over a LAN

• Couples the physical-layer clock with the PTP flow

• Manually configured port states

• Requires link asymmetry calibration using a “Golden Calibrator”

• Not scalable to wide-area or telecom networks