Comtech EF Data CDM-425, Installation And Operation Manual

Page: 316 / 744

CDM-425 Advanced Satellite Modem
Revision 0
Ethernet-based Remote Product Management 7–92 MN-CDM-425
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)
Description
Event Port Number of packets (PTP or other) transmitted/received on the PTP UDP event-message port.
General Port
Number of packets (PTP or other) transmitted/received on the PTP UDP general-message
port.
Announce Number of PTP announce messages transmitted/received from another PTP device.
Sync Number of synchronization messages transmitted/received from a master PTP device.
Followup Number of follow-up messages transmitted/received from a 2-step-clock master PTP device.
Delay Req Number of Delay Request messages transmitted/received from a slave device.
Delay Resp Number of Delay Response messages sent to a slave device.
Mgmt Number of PTP management messages transmitted/received by the modem.
Signal Number of PTP signaling messages transmitted/received by the modem.
Discarded
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.
1. PTP Master Devices send Announce, Sync, Followup, and Delay
Response messages, while PTP Slave Devices send Delay Request
messages.
2.
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.