Qg 2 Multi-Sync Gateway User Guide
Managed Clock Engine Overview
SJC-DEV7250-HR Rev. 1.14
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6.4.2
Enabling Master Unicast Negotiation
The unicast negotiation state is controlled by the
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Section of
this User Guide.
When unicast negotiation is enabled the master accepts unicast transmission requests from negotiation-
capable nodes. If a node is allowed by the acceptance filter and if enough resources are available the
master grants message transmission services to that node.
If unicast negotiation is disabled no new requests are accepted, but all existing grants remain serviced
until they are either expired or cancelled.
6.4.3
Maintaining Master’s Slave Acceptance Filter
Note: In the current implementation, the slave acceptance filter is not user configurable and it is set
to accept all slaves.
In that respect, the following documentation on slave acceptance filter is only for
academic purpose.
The slave acceptance filter is a mechanism to control which slave nodes may obtain unicast services
from the master. If the filter table is empty no services will be granted to any node. The
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Section of this User Guide is used to manipulate the slave acceptance
filter.
As the result of the filter table modification, if a node becomes unacceptable or message rates of any
active grants becomes beyond the newly configured limits, all affected grants will be cancelled.
6.4.4
Maintaining Master’s List Of Static Slaves
Note: In the current implementation, this is not supported.
To provide unicast services to slaves which
do not support the unicast negotiation the master maintains a list of static slave nodes.
When a node is in this list the master can send Announce and Sync messages to that node and can reply
to Delay Request messages received from that node.
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Section of this User Guide is used to monitor and manipulate
the static slave node list.
6.4.5
Monitoring Unicast Operations
Monitoring the status of master unicast operations can be done on the
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found.
and
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Sections of this User Guide.
6.5
Gateway and Boundary clock
The Ts2 Multi-Sync Gateway has the capability of using both of its Ethernet ports (Port 1 and Port 2) as
PTP ports. This opens the possibility of using the Ts2 as a two-port gateway or boundary clock. For more
information about Gateway and Boundary Clocks, see [1].
6.5.1
The Gateway Clock
The Gateway Clock (GC) can be considered as an Ordinary Clock (OC) with two ports, with one port
configured as a master and the other port configured as a slave.
