PTP (IEEE1588)
HMG-838PT & HMG-838EPT Web Configuration 21-4
Unicast Slave Configuration: When operating in IPv4 Unicast mode, the slave is configured up to 5 master IP
addresses. The slave then requests Announce messages from all the configured masters. The slave uses the BMC
algorithm to select one as master clock, the slave then request Sync messages from the selected master.
Duration: Configure the number of seconds a master is requested to send Announce/Sync messages. The
request is repeated from the slave each Duration/4 seconds.
ip_address: Configure IPv4 Address of the Master clock.
grant: The granted repetition period for the sync message.
CommState: The state of the communication with the master, possible values are:
IDLE: The entry is not in use.
INIT: Announce is sent to the master (Waiting for a response).
CONN: The master has responded.
SELL: The assigned master is selected as current master.
SYNC: The master is sending Sync messages.
Ports Configuration
Click on “Ports Configuration” button to configure timing values.
PTP Clock's Port Data Set Configuration:
Anv: The interval for issuing announce messages in master state.
ATo: The timeout for receiving announce messages on the port.
Syv: The interval for issuing sync messages in master.
Dlm: Configure member delay Mechanism used for the port. This can be defined per port in an
Ordinary/Boundary clock. In a transparent clock all ports use the same delay mechanism, determined by the clock
type.
e2e: End to end delay measurement.
p2p: Peer to peer delay measurement.
MPR: The interval for issuing Delay_Req messages for the port in E2Emode. This value is announced from the
master to the slave in an announce message. The value is reflected in the MDR field in the Slave.
Delay Asymmetry: If the transmission delay for a link in not symmetric, the asymmetry can be configured here,
see IEEE 1588 Section 7.4.2 Communication path asymmetry
Ingress latency: Ingress latency measured in ns, as defined in IEEE 1588 Section 7.3.4.2.
Egress Latency: Egress latency measured in ns, as defined in IEEE 1588 Section 7.3.4.2.
Version: The current implementation only supports PTP version 2.
21-2 Status
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