Troubleshooting Line Cards In An Ex9253 Switch - Juniper EX9253 Hardware Manual

• Verify that the AC power cord or DC power cables from the power source to the switch are not
damaged. If the insulation is cracked or broken, immediately replace the cord or cable.
• Connect the power supply to a different power source with a new power cord or power cables. If the
power supply status LEDs indicate that the power supply is not operating normally, the power supply
is the source of the problem. Replace the power supply with a spare.

Troubleshooting Line Cards in an EX9253 Switch

IN THIS SECTION
Problem | 163
Solution | 163
Problem
Description
Line card is not functioning normally.
Solution
• The Routing Engine downloads the line card software to it under two conditions: the line card is
present when the Routing Engine boots Junos OS, and the line card is installed and requested online
through the CLI or the button on the front panel. The line card then runs diagnostics. When the line
card is online and functioning normally, the OK/FAIL LED is lit green steadily.
• Make sure the line card is properly seated in the chassis. Check that each ejector handle is tight.
• Check the OK/FAIL LED on the line card. When the line card is online and functioning normally, the
OK/FAIL LED is lit green steadily.
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