---------------------------------------------
The Unicast mode is activated at the initiative of the Slaves. Each Slave, which wants
to run in Unicast mode, shall first negotiate Unicast contracts with the Master.
Sync Rate
: The rate at which Sync messages are sent, in packets per second. [1 =
1 packet/sec.; 2 = 2 packets/sec.; 0.5 = 1 packet/2 sec.]
Announce Rate
: [see Sync Rate above] The rate at which Announce messages
are sent, in packets per second.
Delay Req Rate
: Interval between request messages sent by the slave to the
master.
Best Master Clock Algorithm
: [On or OFF] When set to ON, the Master will
listen for traffic from other Masters and become passive if another master on the
network has better credentials according to the Best Master Clock Algorithm
(Section 9.3 of IEEE 1588-2008). A passive master will not transmit any protocol
messages as long as another Master is active as the Best Master on the network.
When set to OFF, the Master will act as an active master no matter whether or
not other masters are present. This may be required for certain PTP profiles.
Clock Priority 1
: [0 to 255] (0 is highest priority. Default is
128
for both priority
values. This is usually the priority value that a Slave is set to.) See IEEE 1588-
2008, Section 8.10.1, 8.10.2.
Clock Priority 2
: [0 to 255] (same as above).
Current UTC Offset
: to convert to civil time.
Network Transport
: [Ethernet, IPv4/UDP] Selects the transport protocol used
for PTP packets.
Management Mechanism tab
Request Peer Information
: [ON/OFF] Enable/disable management requests.
Request Peer Information Rate
: [0.2 = one request every five seconds]
Request rate in seconds for PTP Management messages.
Respond to Peer Information Requests
: [ON/OFF] Enable/disable man-
agement responses.
Network tab
Multicast Ttl
: [1 through 255] Time-to-live (packet lifespan) — Sets the TTL field
for PTP packets except for Peer-to-Peer packets for which TTL is forced to 1 as
specified in IEEE Std 1588-2008 Annex D.3.
Unicast Ttl
: [64] Time to live for Unicast packets.
2.11 Configuring PTP
CHAPTER
2
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Summary of Contents for VelaSync 1225
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