Cisco 1841 Hardware Installation Guide - Page 75

Environmental Reporting Features, Troubleshooting Cables, Connections, and Interface Cards - wan card

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Chapter 8 Troubleshooting Cisco 1800 Series Routers (Modular) Problem Solving Environmental Reporting Features If the router is operating at an abnormally high temperature, consider the following causes: • Fan failure • Air conditioner failure in the room • Air blockage to cooling vents Take steps to correct the problem. See the "Site Environment" section on page 3-4. Troubleshooting Cables, Connections, and Interface Cards Network problems can be caused by cables, cable connections, or interface cards, or by external devices such as a modem, transceiver, hub, wall jack, WAN interface, or terminal. Check for the following symptoms to help isolate the problem. • Card is not recognized by the router. - Make sure that the card is firmly seated in its slot. - Check the LEDs on the card. Each card has its own set of LEDs. - Make sure that you have a version of Cisco IOS software that supports the card. • Card is recognized, but interface ports do not initialize. - Make sure that the card is firmly seated in its slot. - Check external cable connections. - Make sure that you have a version of Cisco IOS software that supports the card. Check the software requirements for the affected card, which can be found in the configuration note for the card. • Router does not boot properly, or constantly or intermittently reboots. - Make sure that the card is firmly seated in its slot. - Check the router chassis or software. • 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 baud is the default) (b) 8 data bits (c) 1 stop bit (d) No parity generated or checked • Router powers on and boots only when a particular card is removed. - Check the card. See the "Cisco One-Year Limited Hardware Warranty Terms" section on page 1-14 and the "Obtaining Documentation and Submitting a Service Request" section on page 15 of the "Introduction to Cisco 1800 Series Routers (Modular) Hardware Documentation" document for warranty and customer service contact information. • Router powers on and boots only when a particular cable is disconnected. OL-5876-03 Cisco 1800 Series Routers (Modular) Hardware Installation Guide 8-3

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8-3
Cisco 1800 Series Routers (Modular) Hardware Installation Guide
OL-5876-03
Chapter 8
Troubleshooting Cisco 1800 Series Routers (Modular)
Problem Solving
Environmental Reporting Features
If the router is operating at an abnormally high temperature, consider the following causes:
•
Fan failure
•
Air conditioner failure in the room
•
Air blockage to cooling vents
Take steps to correct the problem. See the
“Site Environment” section on page 3-4
.
Troubleshooting Cables, Connections, and Interface Cards
Network problems can be caused by cables, cable connections, or interface cards, or by external devices
such as a modem, transceiver, hub, wall jack, WAN interface, or terminal. Check for the following
symptoms to help isolate the problem.
•
Card is not recognized by the router.
–
Make sure that the card is firmly seated in its slot.
–
Check the LEDs on the card. Each card has its own set of LEDs.
–
Make sure that you have a version of Cisco IOS software that supports the card.
•
Card is recognized, but interface ports do not initialize.
–
Make sure that the card is firmly seated in its slot.
–
Check external cable connections.
–
Make sure that you have a version of Cisco IOS software that supports the card. Check the
software requirements for the affected card, which can be found in the configuration note for
the card.
•
Router does not boot properly, or constantly or intermittently reboots.
–
Make sure that the card is firmly seated in its slot.
–
Check the router chassis or software.
•
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 baud is the default)
(b) 8 data bits
(c) 1 stop bit
(d) No parity generated or checked
•
Router powers on and boots only when a particular card is removed.
–
Check the card. See the
“Cisco One-Year Limited Hardware Warranty Terms” section on
page 1-14
and the
“Obtaining Documentation and Submitting a Service Request” section on
page 15
of the
“Introduction to Cisco 1800 Series Routers (Modular) Hardware
Documentation”
document for warranty and customer service contact information.
•
Router powers on and boots only when a particular cable is disconnected.