Cisco MWR-1941-DC-2T1 Hardware Installation Guide - Page 63

Troubleshooting Modules, Cables, and Connections

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Appendix A Troubleshooting Problem Solving 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: • Module is not recognized by the router. - Make sure the module is firmly seated in its slot. - Check the LEDs on the module. Each module has its own set of LEDs. For information on these LEDs, see Reading the LEDs, page A-4. - Make sure you have a version of Cisco IOS software that supports the module. • Module is recognized, but interface ports do not initialize. - Make sure the module is firmly seated in its slot. - Check external cable connections. - Make sure you have a version of Cisco IOS software that supports the module. • 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 shipped with your router for warranty information, or contact customer service. • Router boots, but the console screen is frozen. - Check the external console connection. - Verify that the parameters for your terminal are set as follows: (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 publication for warranty information, or contact customer service. 78-15827-06B0 Cisco MWR 1941-DC Mobile Wireless Edge Router Hardware Installation Guide A-3

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A-3
Cisco MWR 1941-DC Mobile Wireless Edge Router Hardware Installation Guide
78-15827-06B0
Appendix A
Troubleshooting
Problem Solving
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:
•
Module is not recognized by the router.
–
Make sure the module is firmly seated in its slot.
–
Check the LEDs on the module. Each module has its own set of LEDs. For information on these
LEDs, see
Reading the LEDs, page A-4
.
–
Make sure you have a version of Cisco IOS software that supports the module.
•
Module is recognized, but interface ports do not initialize.
–
Make sure the module is firmly seated in its slot.
–
Check external cable connections.
–
Make sure you have a version of Cisco IOS software that supports the module.
•
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
shipped with your router for warranty information, or contact customer service.
•
Router boots, but the console screen is frozen.
–
Check the external console connection.
–
Verify that the parameters for your terminal are set as follows:
(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
publication for warranty information, or contact customer service.