Juniper Networks E-Series Troubleshooting Power Failures, 10-2, Symptom Possible Problems Actions

10-2

CHAPTER 10 Troubleshooting

Initialization Sequence

Each E-series 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 Chapter 11, System Specifications for specifications of power consumption and heat dissipation. If you suspect a power problem, refer to Table 10-1.

Table 10-1Causes of power failures

Symptom	Possible Problems		Actions
System does not	• System is not receiving		Note: The following actions apply to all of the possible
power 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 handle			voltage, current, and wattage to the system. See to
		system load.		Chapter 11, System Specifications.
			3	If the system still does not operate, contact Juniper
				Networks Customer Service.
System shuts down.	•	Temperature too high	Note: The following actions apply to all of the possible
	•	Loss of power	problems.
			1	Verify that power connections are properly attached.
			2	Verify that system is receiving power.
			3	Check whether or not the LEDs are lit.
			4	Run diagnostics on SRP and line modules.
			5	If system will not reset, contact Juniper Networks
				Customer Service.

Understanding Status LEDs to Troubleshoot

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.