Problem Solving; Troubleshooting Wan Interface Cards And Cables - Cisco 1603R User Manual

Problem Solving

The key to problem solving is to isolate the problem to a specific subsystem by comparing
what the router is doing to what it should be doing.
When problem solving, consider the following subsystems of the router:
•
WAN interface cards—Refer to the LEDs on the cards and the LEDs on the router front
panel to help identify a failure. For information on the front panel LEDs, refer to the
"Front Panel LEDs" section later in this appendix.
•
Cables—Check all the external cables that connect the router to the network.
•
Power system—Consider the external power source, power cable, router power supply,
and circuit breaker. Check for inadequate ventilation or air circulation.
•
ISDN configuration—Consider ISDN-specific hardware and software configurations
(Cisco 1603, Cisco 1604, and ISDN BRI WAN interface cards only).

Troubleshooting WAN Interface Cards and Cables

Check for the following symptoms to help isolate the problem:
•
WAN interface card is not recognized by the router.
— Make sure that the card is correctly installed in the router. Refer to the "Installing a
— Check the LEDs on the card and on the front panel of the router.
— If you are using a Cisco 1603 or Cisco 1604, check that the router does not have a
•
WAN interface card is recognized, but interface ports do not initialize.
— Make sure that the card is correctly installed in the router. Refer to the "Installing a
— Check the external cable connections to make sure they are secure.
•
Router does not boot properly or constantly or intermittently reboots.
— Make sure that the card is correctly installed in the router. Refer to the "Installing a
WAN Interface Card" section in the "Optional Installations" chapter.
ISDN S/T or an ISDN U card installed.
WAN Interface Card" section in the "Optional Installations" chapter.
WAN Interface Card" section in the "Optional Installations" chapter.
Problem Solving
Troubleshooting A-5