Troubleshooting Modules, Cables, And Connections - Cisco MWR 1941-DC - 1941 Mobile Wireless Router Hardware Installation Manual

Appendix A Troubleshooting

Troubleshooting Modules, Cables, and Connections

Network problems can be caused by a module, cables or cable connections, or external devices such as
a modem, transceiver, hub, wall jack, WAN interface, or terminal. Check for the following symptoms to
help isolate the problem:
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Module is not recognized by the router.
Make sure the module is firmly seated in its slot.
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Check the LEDs on the module. Each module has its own set of LEDs. For information on these
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LEDs, see Reading the LEDs, page
Make sure you have a version of Cisco IOS software that supports the module.
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Module is recognized, but interface ports do not initialize.
Make sure the module is firmly seated in its slot.
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Check external cable connections.
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Make sure you have a version of Cisco IOS software that supports the module.
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Router does not boot properly, or constantly or intermittently reboots.
– Make sure the module is firmly seated in its slot.
Check the router chassis or software. Refer to the Cisco Information Packet publication that
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shipped with your router for warranty information, or contact customer service.
Router boots, but the console screen is frozen.
Check the external console connection.
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Verify that the parameters for your terminal are set as follows:
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(a) The same data rate as configured for the router (9600 bps is the default)
(b) 8 data bits
(c) No parity generated or checked
(d) 2 stop bits
Router powers on and boots only when a particular module is removed.
– Check the module. Refer to the Cisco Information Packet publication that accompanied your
order for warranty information, or contact customer service.
Router powers on and boots only when a particular cable is disconnected.
There may be a problem with the module or cable. Refer to the Cisco Information Packet
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publication for warranty information, or contact customer service.
Cisco MWR 1941-DC Mobile Wireless Edge Router Hardware Installation Guide
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Problem Solving
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