Juniper Networks ERX-1410 manual Troubleshooting Power Failures, Symptom Possible Problems Actions

8-2

CHAPTER 8 Troubleshooting

LED Activity

Module LEDs can show you the immediate status of a module and alert you to a problem with the module or one of its ports. It is helpful to familiarize yourself with LED activity so that you can easily detect and correct a module-related problem with minimal or no system downtime. See Table 8-2and Table 8-3for specific information on normal LED activity. See Table 8-4for specific information on troubleshooting abnormal LED activity.

Module Cables

See Chapter 4, Cabling the ERX System, for information about cabling modules.

Initialization Sequence

Each ERX line module is initialized independently. As a result, the CLI on the SRP module may become available before the line modules have completed initialization. Commands relating to a line module may fail if the module has not completed initialization. The show version command can be used to display line module status. Do not enter commands for a line module until its state is “online.”

Troubleshooting Power Failures

The system’s distributed power system is designed to consume low levels of power and dissipate low levels of heat. See Appendix A, System Specifications for specifications of power consumption and heat dissipation. If you suspect a power problem, refer to Table 8-1.

Table 8-1Causes of power failures

Symptom	Possible Problems	Actions
System does not power	• System is not receiving	Note: The following actions apply to all of the possible
up.	power.	problems.
	• A module’s power supply	1	Verify that all power connections are correct.
	has malfunctioned.	2	Verify that the power supply is delivering the correct
	• Power source cannot		voltage, current, and wattage to the system. Refer to
	handle system load.		Appendix A, System Specifications.
		3	If the system still does not operate, contact Juniper
			Networks Customer Service.