HSR

OnTime Networks introduced HSR feature to the CM/CR-6224F4-MIL series. It’s the first fully rugged Ethernet switch and router solution to feature High-Availability Seamless Redundancy (HSR).

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IEEE 1588
PTPV1 TO PTPV2 TRANSLATION

The need for PTP version translation is driven by the fact that PTPV1 (IEEE 1588 2002) is not backward compatible with PTPv2 (IEEE 1588 2008).

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IEEE 1588 BASICS OF ETHERNET SYNCHRONIZATION

Modern time synchronization systems are based on the Precisions Time Protocol (PTP) according to the IEEE 1588 standard. PTP replaces dedicated time synchronization lines used for distribution of GPS data and IRIG-B.

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PACKET FILTERING

OnTime Networks technology implements filtering based on MAC, IP, UDP, and Application layer The Mac filtering is realized by using the port-based VLAN. The IP filtering is realized by using the IGMP.

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IEEE 1588
PTP MESSAGE SEQUENCES

This section describes the PTP message sequences that occur during synchronization. The PTP clocks configured for End-to-End delay mechanism use the following PTP messages. 

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ETHERNET PACKET TIME STAMP INSERTION CAPABILITY

Network tapping is an integral part of thorough network analysis and optimization. OnTime Networks connectivity provides maximum performance and security with timestamping feature allowing for real-time analysis of aggregated and recorded traffic. 

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ETHERNET HISTORY

In late 1972, Metcalfe and his Xerox PARC colleagues developed the first experimental Ethernet system to interconnect the Xerox Alto, a personal workstation with a graphical user interface. .

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IEEE 1588
TRANSPARENT CLOCK OPERATION

The Transparent Clock (TC) mode is implemented in each network switch. The TC functionality corrects the residual latency introduced by the network node. 

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