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Cisco uBR7100 Series and Cisco uBR7100E Series Universal Broadband Router Hardware Installation Guide
OL-5916-01
Chapter 5 Troubleshooting the Installation
Troubleshooting the Power Subsystem
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The system ready LED (SYS RDY) comes on after the power LED and indicates that the
network processor card is enabled for operation by the system; however, it does not mean that
the Fast Ethernet port is functional or enabled. This LED comes on during a successful router
boot and remains on during normal operation of the router.
If this LED remains off when you start the router, it is probably a problem with the main
processor card. Contact your service representative for technical assistance.
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Each enabled LED for the cable interface (EN, DS0 RF, DS0, U0, U1, U2, and U3) comes on
initially at power-on and then turns off. The LED then comes on again and remains on when the
corresponding port is enabled and configured for operations.
If an enabled LED fails to come on at initial power-on, or if the LED fails to come on and remain
on after the port is enabled and configured, proceed to the “Troubleshooting the Port Adapter
and Fixed RF Ports” section on page 5-5.
–
The slot 0 and slot 1 LEDs only come on when the PCMCIA card slot is being accessed by the
system. These LEDs remain off during normal operation of the router and do not indicate startup
problems.
• The initial system banner should be displayed on the console screen.
If it is not displayed, see the “Connecting the Console Port and Auxiliary Port” section on page 3-10
to verify that the terminal is set up correctly and that it is properly connected to the router’s console
port.
Troubleshooting the Power Subsystem
Check the following to help isolate a problem with the power subsystem:
• Is the power LED (PWR) on?
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If yes, the power source is good, and the power supply is functional.
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If no, make sure that the power cable is connected at both ends.
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If the power LED remains off, and the power switch is set correctly, suspect the power source
or the power cable. Turn the switch off, connect the power cable to another power source, if
available, and turn the switch back on. If the LED comes on, the problem is the first power
source.
–
If the power LED fails to come on after you connect the power supply to a new power source,
replace the power cord, and turn the switch back on. If the LED comes on, return the first power
cable for replacement.
–
If the LED still fails to come on when the power supply is connected to a different power source
with a new power cable, the power supply is probably faulty. Contact a service representative
for further instructions.
Troubleshooting the Processor Subsystem
The processor subsystem comprises the network processing card and the ports. The system can operate
without a port adapter installed as long as none are in partial contact with the connector pins. A port
adapter that is partially connected to the router sends incomplete signals to the processor, which faults
the Peripheral Component Interconnect (PCI) bus and causes the system to hang. Therefore, first ensure