Comtech EF Data CDM-IP 300L - Manual (Page 343)

CDM-IP 300L IP-Centric Satellite Modem Rev. 1
CD/CDMIP300L.IOM
317
2 No Ping response from the
locally connected PC to the
remote CDM-IP or remote PC.
ICMP response is ‘Request
timed out’.
a) Verify both CDM-IP’s are in easyConnect /Point-
to-Point Modes.
b) Verify IF link between modems for proper settings
and carrier quality (RX signal level, E
b
/N
0
, etc.). It
is possible that there is a spectrum inversion,
particularly if you are using the CDM-IP with RF
converter equipment. If this is the case, the signal
level & E
b
/N
0
may be OK, but no data will be
received. To correct this, invert the TX and RX
Spectrum on one of the CDM-IPs.
c) Send a constant ping from the PC 1 ‘ping
172.16.10.2 –t’ to PC 2. In the CDM-IP1, go to
Operations and Maintenance/Diagnostics. Enable
‘Dump Packets transmitted to Satellite Interface’.
Verify that the Pings are being transmitted by
observing 1 packet on CLI every second. If not
displayed, reverify PC 1 and CDM-IP 1 settings.
Disable ‘Dump Packets transmitted to Satellite
Interface’ by entering ‘T’.
d) Continue sending constant ping from the PC 1 to
PC 2. In the CDM-IP 2, go to Operations
Maintenance/Diagnostics. Enable ‘Dump Packets
received from Satellite Interface’. Verify that the
Pings are being received by observing 1 packet on
CLI every second. If not displayed, reverify PC 2
and CDM-IP 2 settings. Disable ‘Dump Packets
received from Satellite Interface’ by entering ‘R’.
Note: All pings transmitted will require a reply to
be transmitted from the target host. Use
the Diagnostics “Dump Packets” tools to
isolate where packets are lost in the CDM-
IP duplex paths. Also, always disable
“Dump Packets” before sending live traffic.