Viewing the PTP Foreign Master Details

Use the PTP Foreign Master page to view the PTP details of the master that is learned by a port. The foreign master record will be available only when a port is in the slave state. To view this page, go to Settings > Date and Time > PTP Foreign Master.

In Figure 1: PTP Clock Details, you can see that there is no foreign master record for the port 1/1/c13 because the port is in the master state. Whereas, the foreign master record appears for the port 1/1/c29, which is in the slave state.

Figure 127

PTP Foreign Master Details

Following table lists the PTP foreign master attributes and their descriptions:

PTP Foreign Master Attribute	Description
Port ID / Port Alias	The port identifier.
Box ID	The box identifier of the device.
Best Master	The best master clock for the device.
Port Identity	The clock identity of the foreign master that the port has learned.
Grandmaster Priority2	The priority value of the grandmaster that is used when Grandmaster Priority1 value is the same for different masters in a network.
Announce Msg Count	The total number of announce messages that were sent and received by the port.
Steps Removed	The number of boundary clocks between the local clock and the foreign master clock.
Grandmaster Clock Identity	The clock identity of the grandmaster. It is a 64-bit global identifier (EUI-64) as defined by the IEEE standard.
Port Module Number	The module number of the physical port.
Port Number	The physical port identifier.
PTP Protocol	The protocol used by the PTP is IPv4 Ethernet.
Clock Address	The IP address that is derived based on the clock ID.
Grandmaster Priority1	The priority value of the grandmaster clock. Lower value takes precedence.
Last Sync	The time when the last synchronization message was sent by the foreign master to the slave.
Last Follow Up	The time when the last follow-up message was sent by the slave to the foreign master.
Last Delay Response	The time when the last delay response was sent by the foreign master to the slave.
Mtsd Scaled Avar	MTSD-scaled Allan variance (nsec-sq).
Quality Class	The traceability of the time or frequency distributed by the foreign master clock.
Quality Offset	The log variance field of the announce message.
Quality Accuracy	The clock accuracy indicates the expected accuracy of the foreign master clock.