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PTP Clock reflector =================== Reflector takes packets from a PTP (IEEE1588:2008) clock running on PTP domain 0, and makes it available on PTP domain 1 and also changes the clock identification accordingly. This allows making a local clock available on the network and reflecting it back to the same machine for testing of PTP clock implementations. Locally you can run ptpd from http://ptpd.sourceforge.net with ptpd -i eth0 -M -n -C and a PTP slave clock, e.g. http://cgit.freedesktop.org/~slomo/gstreamer/tree/tests/examples/ptp/ptp-print-times.c?h=ptp ./ptp-print-times -d 1 Remotely you can run reflector with ./reflector The PTP slave clock will now get the local clock time from the network with 2 round-trip times between the local and remote machine added. If the PTP slave clock implementation works correct, the difference between the local clock and the "remote" PTP clock should be approximately 0.