Product specifications

CDD-562L/564 Demodulator with IP Module Revision 1
Appendix A MN/CDD564L.IOM
A–10
A.4 Troubleshooting the IP Module
The CDM-IP & CDD-56X come with a variety of diagnostic tools to aid in identifying the traffic
path going into and out of the modems. This section shows how to use some of these
troubleshooting tools, and additionally identifies several common problems encountered when
first setting up two CDM-IP modems.
If following these troubleshooting steps fails to resolve the problem, contact a User Support
representative at:
Comtech EF Data
Attention: User Support Department
2114 West 7th Street
Tempe, Arizona 85281 USA
480.333.2200 (Main Comtech EF Data Number)
480.333.4357 (User Support Desk)
480.333.2161 FAX
Alternately, E-mail can be sent to the User Support Department at:
[e-mail]
A.4.1 Router Mode Troubleshooting
Use the following troubleshooting steps if unable to successfully send traffic in Router Mode.
Router Mode Troubleshooting
Step Problem Action
1
No Ping response from the locally
connected PC to the CDM-IP/CDD-
56X Ethernet port.
ICMP response is:
‘Request timed out’.
a) Verify correct IP address/subnet on PC and CDM-IP/CDD-
56X.
b) Verify Ethernet connection – cables, hub, etc. PC, hub, and
CDM-IP/CDD-564L 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/CDD-
56X 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 PC1 to
PC2 or vice versa.
ICMP response is:
‘Reply from 172.XXX.10.1 -
Destination net
unreachable’
a) Verify CDM-IP, CDD-564L Route Tables are correct.
b) Verify the hdrcomp and decomp both are either enabled or
disabled.
Note: Go to the Route Table, then Options page to verify
hdrcomp is enabled or disabled. On the remote modem, go
the main menu, press ‘A’ Administration, and ‘F’ for Feature;
hdrdecomp should be same as hdrcomp (i.e., both should
either be enabled or disabled).