PTP module

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The PTP module processes PTP traffic and stores the MAC (plus IP if available) and further PTP meta data of the PTP members.


PTP masters

The PTP masters table shows details about the PTP masters in the network. For each master, the peer id, the MAC address, and the IP address (if available) are shown. The second column lists details about the grandmaster clock which is active. Depending on the setup, it is possible that the same master was fed by different grandmasters. Each combination of master and grandmaster will be a different line in the table. The details about the grandmaster include the current UTC offset, the time source, the accuracy and the clock variance. The sync column shows when the last sync message was sent by the master. The history column shows a graph which shows the offset of the clock to the local clock of the Allegro Network Multimeter. Above the table is a select box Normalize values to last received time offset. If this is activated, the graph will show the time offset relative the last received offset. The PCAP column allows to capture all PTP frames from the PTP peer. The PCAP will include the PTP frames from all grandmasters represented by this master, not just from the one of the current line of the table.


PTP peers

The PTP peers table show details about the PTP peers. For each peer,the peer id, the MAC address, and the IP address (if available) are shown. The second column shows the status of the peer. This includes the PTP version and domain as well as the master/slave status of the peer. A PTP user can be slave, master or neither of them. The master / slave status is derived from the last seen sync/ delay message. A PTP member that has sent no PTP messages for a while, but has had sent some in the past, will stay as PTP member for a while without master or slave status. The third column shows when the last sync message was sent by the peer as well as the total number of sync messages sent. The next column shows when the last delay request message was sent as well as the total number of delay request messages sent. The PCAP column allows to capture all PTP frames from the PTP peer.