Cisco 1721 - Manual (Page 60)

Chapter 3 Troubleshooting
Problem Solving
3-10
Cisco 1721 Router Hardware Installation Guide
78-13834-02
Troubleshooting the Power System
If the router external power supply fails, you should return it to your Cisco
reseller.
Table 3-3 list symptoms and possible causes of power problems.
Router recognizes the
WIC(s), but the card port(s)
do not initialize. • Make sure that the WIC is correctly installed in the router. See the
“Installing WICs” section in the “Installation” chapter of this guide.
• Check the external cable connections to make sure they are secure.
Router does not boot
properly, or router
continuously or
intermittently reboots. Make sure that the WIC is correctly installed in the router. See the
“Installing WICs” section in the “Installation” chapter of this guide.
Router boots, but the
console screen is frozen. • Make sure that the console cable is securely connected to the router
and to the PC or terminal.
• Verify that the parameters for your terminal are set to the following:
– 9600 baud
– 8 data bits
– No parity generated or checked
– 1 stop bit
Router powers on and boots
only when a particular WIC
is removed from the router. • Confirm that the Cisco IOS software version installed in the router
supports the WIC. The Cisco WAN Interface Cards Hardware
Installation Guide lists the software requirements for each card.
• The router might be overheating. Contact your Cisco reseller.
Router powers on and boots
only when a particular cable
is disconnected. There might be a problem with the WIC or with the card cables. Consult
your Cisco reseller for warranty information.
Table 3-2 Troubleshooting WICs (continued)
Symptom Possible Cause(s)