GE DR60 Technical Manual page 50

50
clocks in the correction field of the PTP message. In this mode the
propagation delay of the link connected to the port is not corrected
▪
Peer-to-peer: Use the peer delay mechanism for the delay
measurement. In addition to providing PTP event transit time
information, also provides corrections for the propagation delay of
the link connected to the port receiving the PTP event message
The peer delay mechanism measures the port to port propagation
delay time between two directly connected ports sharing the same
communication technology.
▪
Grandmaster Priority: Is an administratively assigned precedence hint used by
the Best Master Clock algorithm (BMC) to help select a grandmaster for the
PTP domain. The range is from 0 to 255.
▪
Announce Receipt Timeout: configures the interval between PTP announce
messages on an interface or the number of PTP intervals before a timeout
occurs on an interface.
When configuring PTP, the first point is to select which PTP profile, or which common
parameters, will be used along with all PTP devices. The DR60 has three options to be
selected as profile:
•
Power Profile – IEEE C37.238/2011: this profile has some fixed parameters defined
by the standard and some configurable parameters defined by the user.
The configurable parameters for Power Profile are:
Domain number;
VLAN ID and Priority;
The fixed parameters are:
Network Protocol: Ethernet Level 2;
Operation Mode: One step;
Delay Mechanism: Peer-to-peer;
Grandmaster Priority: #1 255; #2 255;
Announce Receipt Timeout: 3
•
The CUSTOM profile has all its parameters opened for user configuration.
•
The P2P Default profile is partially configurable. The fixed parameters are are:
Domain number: 0;
Grandmaster Priority: #1 128; #2 128
Configurable parameters are:
Domain number:
Operation mode:
Delay Mechanism:
GRANDMASTER PRIORITY:
Announce Receipt Timeout:
DR60
DR60-TM-EN-2A