Comtech EF Data CDM-625A - Page 306

CDM-625A Advanced Satellite Modem MN-CDM625A
Ethernet-based Remote Product Management Revision 4
7–76
Row Title
(from top)
Description
WAN State
Displays the state for the clock on the WAN side:
• The State displays as “Slave” when Grandmaster is set to LAN port using the
‘Configuration | ANT | PTP’ page (see Sect. 7.5.4.3.11.1)
• The State displays as “Master” when Grandmaster is set to WAN port using the
‘Configuration | ANT | PTP’ page (see Sect. 7.5.4.3.11.1).
PTP Statistics
Click [Refresh] to update the page with the latest available statistics.
Click [Clear] to clear all PTP statistics from the buffer.
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.