IEEE 1588 ptp and SyncE

https://www.ipinfusion.com/documentation/application-notes/

Why it's important
	Slip in phase and frequency is detrimental to normal operation in mobile TDD (Time Division Duplex) band causing inter-cell interference and eventually effecting call degradation and hand-off coordination
PtP
	PTP leverages hardware time stamping of PTP PDUs to achieve sub-100 nanosecond level accuracy while filtering dynamic time error accumulation along the way
ptp vision
	PTP (Precision Time Protocol) - IEEE 1588-2002
	PTPv2 (Precision Time Protocol Version 2) - IEEE 1588-2008
Key Differences	Accuracy: PTPv2 generally provides higher accuracy and precision than the original PTP. Features and Flexibility: PTPv2 includes features like boundary and transparent clocks, the Best Master Clock Algorithm, and support for profiles, which are not present in the original PTP. Use Cases: While both versions are used in industrial, scientific, and commercial applications, PTPv2 is better suited for environments requiring higher precision and more complex network topologies.
The version 2 of IEEE 1588-2008
	introduces the concept of “profile”
G.8265.1	ITU-T G.8265.1 telecom profile is specified for frequency synchronization >>> G.8275.1 Full Timing Support (FTS)
G.8265.2	ITU-T G.8275.1/G.8275.2 are for phase/time synchronization >>> G.8275.2 Partial timing support (PTS) >>> G.8275.2 Assisted Partial timing support (APTS) >>> E2E Transparent Clock , PTP Master
Diagram

SyncE config
	SyncE Config show running-config synce ! synce synchronization option 1 ! interface ce3 synce mode synchronous input-source 20 output-source wait-to-restore 1 ! interface ce1 synce mode synchronous input-source 30 output-source wait-to-restore 1 ! interface ce44 synce mode synchronous input-source 10 wait-to-restore 1
Quality Level	QL_SSU_A (Synchronization Supply Unit Type A) QL_PRC (Primary Reference Clock) QL_DNU (Do Not Use) ESMC (Ethernet Synchronization Messaging Channel)
Using QL	https://docs.ipinfusion.com/service-provider/index.html#page/OcNOS-SP/SyncE-Config/Config_SynchE.html#ww506644
Using priority	https://docs.ipinfusion.com/service-provider/index.html#page/OcNOS-SP/SyncE-Config/Config_SynchE.html#ww504919 !!! clock-selection mode ql-disabled >>> will work on priority and not use ESMC meaages

PtP config	Attached to GM clock on ce44
	SyncE Config Expand source show runn ptp ! ptp clock 0 profile g8275.1 number-ports 5 system-clock-sync 30 clock-port 1 network-interface ce44 exit clock-port 2 master-only network-interface ce1 exit clock-port 4 master-only network-interface ce3 exit
	uk-wnlb-lg-pol-cin-01(config-clk-port)#2024 Jul 19 11:03:11.566 : uk-wnlb-lg-pol-cin-01 : HSL : CRITI : [PTP_SERVO_STATE_2]: Phase Locked. -> Holdover in Spec.
	show ptp servo uk-wnlb-lg-pol-cin-01#show ptp servo PTP servo status for clock 0 Servo Config : Freq + Phase Correction Servo State : Holdover-in-spec Servo State Duration : 00:03:51 Servo APTS Mode : N/A Frequency Correction : 0.000 ppb Phase Correction : 977250000.000 nsec Offset From Master : 0 nsec Mean Path Delay : 13 nsec APTS GPS to PTP Offset : N/A Sync Packet Rate : 16 Delay Packet Rate : 16
	show ptp clock 0

IEEE 1588 ptp and SyncE

Key Differences