Cisco Systems 10008 Troubleshooting Installation Problems, General Troubleshooting Tips

10Troubleshooting Installation Problems

This section contains general troubleshooting information to help you solve problems you might encounter during the installation of the system. For any problems not covered in this section and for more detailed troubleshooting information, see the Cisco 10000 Series Internet Router Troubleshooting Guide.

General Troubleshooting Tips

All Cisco 10008 field-replaceable units (FRUs) are hot-swappable. Procedures for removing and replacing the FRUs can be found in the Cisco 10000 Series Internet Router Troubleshooting Guide.

Table 4 lists general FRU fault symptoms and recommendations.

Table 4 General Troubleshooting Tips

Symptom	Steps to Take
System fails to power on	Check that:
	• All power cords are properly connected to the Cisco 10008 router and at the power
	connection end.
	• The PEM power switches are in the On position.
	– For DC PEMs, the POWER LED should be on (green).
	• The blower module is fully inserted (FANS OK LED is on [green]).
System fails to boot up properly	If the system has power, check the FAIL LED on the PRE and any information on the
	alphanumeric display. If the FAIL LED is on, see the Cisco 10000 Series Internet Router
	Troubleshooting Guide.
DC PEM problem	• If the FAULT LED is on, see the Cisco 10000 Series Internet Router
	Troubleshooting Guide.
	• If the MISWIRE LED is on, the –48V and return (RTN) wires are reversed. Power
	off the PEM and reconnect the wires correctly (see the “Connecting DC Power to
	the Cisco 10008 Router” section on page 19).
System experiences a critical alarm	Enter the show facility-alarm status command at the console.
(CRITICAL LED on the PRE is on)
System experiences a major alarm	Enter the show facility-alarm status command at the console.
(MAJOR LED on the PRE is on)
System experiences a minor alarm	Enter the show facility-alarm status command at the console.
(MINOR LED on the PRE is on)
You cannot establish a console or	For information about troubleshooting Ethernet connections, see the “Troubleshooting
Telnet connection to the system	Ethernet Connections” section on page 45.
	For information about troubleshooting the console port serial connections, see the
	“Troubleshooting the Console Port Serial Connection” section on page 46.
Fan failure	If a FAN FAILURE LED lights, perform the following steps:
	• Reseat the blower module (see the Cisco 10000 ESR Blower Module Installation).
	• Remove the rear safety cover and be sure that the blower module cable is connected
	securely (see the Cisco 10000 ESR Blower Module Installation).
System overheats	See the Cisco 10000 Series Internet Router Troubleshooting Guide for additional
	information.

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