Mocomtech CDM-570 - Manual (Page 418)

CDM-570/570L Satellite Modem with Optional IP Module Revision 4
Appendix D MN/CDM570L.IOM
D.4.2 Router Mode Troubleshooting
Use the following troubleshooting steps if unable to successfully send traffic in Router
Mode.
Router Mode Troubleshooting
Step Problem Action
a) Verify correct IP address/subnet on PC and
CDM-IP. 1 No Ping response from the
locally connected PC to the
CDM-IP Ethernet port. ICMP
response is ‘Request timed out’.
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:
phymon_callback(): enet link
change! link=1
If the connection is broken, the CLI will
display:
phymon_callback(): enet link
change! link=0
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/Small Network
Modes.
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’
a) Verify CDM-IP Route Tables are correct.
D–14