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This statistics table breaks down the number of PTP packets sent (Tx columns) or received (Rx
columns) on the LAN and WAN ports as follows:
Row Title
(from top)
Event Port
General Port
Announce
Sync
Followup
Delay Req
Delay Resp
Mgmt
Signal
Discarded
1. PTP Master Devices send Announce, Sync, Followup, and Delay
2.
Ethernet-based Remote Product Management
Number of packets (PTP or other) transmitted/received on the PTP UDP event-message port.
Number of packets (PTP or other) transmitted/received on the PTP UDP general-message
port.
Number of PTP announce messages transmitted/received from another PTP device.
Number of synchronization messages transmitted/received from a master PTP device.
Number of follow-up messages transmitted/received from a 2-step-clock master PTP device.
Number of Delay Request messages transmitted/received from a slave device.
Number of Delay Response messages sent to a slave device.
Number of PTP management messages transmitted/received by the modem.
Number of PTP signaling messages transmitted/received by the modem.
Total number of PTP packets discarded by the modem.
Note: Some discarded messages are normal. For example, if the modem receives a PTP
message while it is configuring its PTP port, it will discard that message.
Response messages, while PTP Slave Devices send Delay Request
messages.
PTP is a UDP multicast protocol. When negotiating with devices over the
LAN interface, the modem uses UDP Port 319 for events, and UDP Port
320 for general packets. On the WAN interface, the modem uses UDP
Port 59319 for events, and UDP Port 59320 for general packets.
CDM-425 Advanced Satellite Modem
Description
7–92
Revision 0
MN-CDM-425
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