Juniper Networks 8 manual Resetting Line Modules and SRP Modules, Double-Bit Errors on SRP Modules

ERX 8.0.x Hardware Guide

Table 15: Troubleshooting High-Temperature Conditions (continued)

Cause of High Operating
Temperature	Symptoms		Resolution
Cooling fan failure		FAN OK LED on SRP module is	Replace fan tray. (See “Maintaining ERX
		not illuminated.	Routers” on page 85.)
		FAN FAIL LED on SRP module
		is illuminated.
Module failure	FAIL LED on module is illuminated.		Replace module. (See “Installing
			Modules” on page 35.)

When you have resolved the cause of the high temperature, you must power cycle the system to reset the modules.

Resetting Line Modules and SRP Modules

Two recessed buttons on line modules and SRP modules provide the mechanisms for resetting. You can use the NMI button to reset the software on the module and the module reset button to reset the module. See Figure 9.

If a line module fails to respond for an extended time, that module might have a software problem. You can depress the software reset button with a paper clip to suspend the current software task. Depending on the situation, this action might also reset the software on the module.

If depressing the software reset button fails to correct the issue with the line module, depress the module reset button to reboot the line module.

The buttons work in the same way for the SRP module. Depressing the module reset button on an SRP module is equivalent to rebooting the router and causes all the line modules to reboot.

Double-Bit Errors on SRP Modules

SRP modules include error checking and correction (ECC) to protect their SDRAM. ECC provides error detection of single-bit and double-bit errors and correction of single-bit errors for the SDRAM as follows:

If ECC detects a single-bit error, it automatically corrects the error, and operation continues.

If ECC detects a double-bit error, it logs the error, stops the main processor on the controller, and takes the SRP module offline.

Detecting Double-Bit Errors

The following message appears on the console if ECC detects a double-bit error:

114 Double-Bit Errors on SRP Modules