Comtech EF Data CDM-570 - Manual (Page 436)

CDM-570/570L Satellite Modem with Optional IP Module Revision 12
Appendix F MN/CDM570L.IOM
F–10
F.5.2 Router Mode Troubleshooting
Use the following troubleshooting steps if unable to successfully send traffic in Router Mode.
Router Mode Troubleshooting
Scenario Problem Action
1 No Ping response from the
locally connected PC to the
CDM-IP Ethernet port.
ICMP response is ‘Request
timed out’.
a) Verify correct IP address/subnet on PC and CDM-IP.
b) Verify Ethernet connection – cables, hub, etc. PC, hub, and
CDM-IP should have Ethernet activity LED lit.
Note: A PC must be connected to the CDM-IP using a hub,
switch or a RJ45 crossover cable.
When the CDM-IP Ethernet port senses an Ethernet
connection, the CLI will display:
Ethernet Interface UP
If the connection is broken, the CLI will display:
Ethernet Interface DOWN
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 Router-Point to Point Mode.
b) Verify PC’s Gateways are set to local CDM-IP address.
c) 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.
3 No Ping response from PC 1
to PC 2 or vice versa.
ICMP response is ‘Reply
from 172.XXX.10.1 -
Destination net
unreachable’.
Verify CDM-IP Route Tables are correct.