Comtech EF Data CDM-570A - Manual (Page 491)

CDM-570L/570AL Satellite Modem with Optional Packet Processor MN-CDM570A
Appendix D Revision 2
D–33
D.2.7.2 Router Mode Troubleshooting
Follow these troubleshooting steps if unable to successfully send traffic in Router Mode.
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, PC, Layer 2 hub or switch,
and CDM-IP should have Ethernet activity LED lit.
Note: A PC must be connected to the CDM-IP using a Layer 2
hub or switch, or an RJ45 crossover cable.
When the CDM-IP Ethernet port senses an Ethernet connection,
the CLI displays:
Ethernet Interface UP
If the connection is broken, the CLI displays:
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-IPs are in Router-Point to Point mode.
B. Verify the 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 and 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 User
PC 1 to User PC 2 or vice
versa.
ICMP response is:
Reply from
172.XXX.10.1 -
Destination net
unreachable
Verify CDM-IP Route Tables are correct.