LAWO edge, Руководство пользователя

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edge - User Manual
Version: 1.0.13/1 Exported on: 22 February, 2024 51 / 154
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PTP Process Status
Shows the status of the internal PTP processes within the blade.
Port Enables
Shows which port(s) are listening for, or transmitting, PTP. You can add or remove port(s) using the Enable Port PTP
options.
Domain
Defines the domain number. The recommended value for this field will vary depending on the PTP profile in use . Please
refer to the Lawo IP Networking Guide .
DSCP
Defines the DSCP (differentiated services code point) or quality class. The default value for PTP is 56.
Priority 1 and Priority 2
These options set the PTP priorities of the processing blade as follows.
PTP uses a master-slave approach in which all master-capable devices elect the best master, called the grandmaster,
according to a common algorithm known as the Best Master Clock Algorithm (BMCA). The algorithm compares the following
parameters in turn:
Priority 1 - the lower the number, the higher the priority of the device.
Clock Class
Priority 2
- as for Priority 1 .
MAC Address
For example, if there is no Priority 1 available, then all devices on the network look at the Clock Class , then Priority 2 and
finally the MAC Address .
Note that only the Priority 1 and Priority 2 values can be adjusted for .edge. The Clock Class cannot be adjusted but may
be used by a third-party grandmaster if one is installed. The MAC Address (for the transmitting port) can be viewed in
HOME's Network Ports tab.
In order to sync properly, the Priority values must be configured according to the system design. In particular, a Slave Only
device will not sync properly unless its priority is lower than that of the desired grandmaster.
Slave Only
This option defines the PTP mode: ON = Slave Only; OFF = master-slave.
TimeToLive
Defines the PTP Time To Live (TTL). The value determines how many "hops" the PTP clock streams may navigate. Each
time a stream traverses a network switch, the TTL is reduced by one.
All Port Parameters
Synchronization → PTP → All Ports