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SyncE Status in BC mode
Figure 47 BC SyncE status output on PTP::Port webpage
The above figure is a sample status of SyncE when EdgeSync is operating as a BC, getting the SyncE
reference from Port1 and propagating it on Port2. Here, on port-2 a SFP optical module is used instead
of the native RJ45 Copper port. The following explains the different fields for this use case:
• SSM channel (ESMC) – it is enabled for both ports. On Port1 it is recovered and on Port2 it is
transmitted.
• Link Mode – this is as per 802.3 standard as mentioned in the previous GM use case.
o Port1: The link mode is in alignment with SyncE as this is a SyncE slave port and getting
the frequency reference from its link partner.
o Port2: The link mode does not matter as it is not copper but is SFP optical. It is
displayed as “master-slave”. If it had been Copper/RJ45, then it would have displayed
as “master”.
• Input QL – This is the Quality level received on that port (from its link partner).
o For Port1, it indicates AUTO (QL-PRC) indicating that incoming SyncE ESMC has QL-
PRC. This is used as SyncE reference.
o For Port2, it indicates AUTO (QL-DNU) indicating that incoming SyncE ESMC has QL-
DNU.
• Output QL – This is the Quality level transmitted out on the port.
o For Port1, QL-DNU is sent out. This is required on the port that is being used as SyncE
reference to avoid any clock loops
o For Port2, the AUTO indicates that we are transmitting QL that was received as
reference. The actual value is QL-PRC, the frequency propagated from Port1 input.
• Active Reference - This will indicate YES or NO and pertains to recovery of frequency on a
specific Ethernet port
o For Pot1, it is YES since the reference frequency is recovered here
o For Port2, it is NO since the recovered frequency is not used as reference
SyncE – some additional notes
Some additional notes regarding SyncE feature in EdgeSync:
1. Synchronous Ethernet is supported only for 1GE interface speed. If user had configured
previously on Interfaces::PTP webpage for a different Auto-Negotiation and speed parameters,
they will be reset to 1000Mbps Full-duplex.
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