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• Installing an M120 Routing Engine    

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• M120 Routing Engine Description
• Routing Engine Interface Ports and Status Indicators on the M120 Craft Interface

Installing an M120 Routing Engine

To install a Routing Engine into a CB (see Figure 1):

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
2. Ensure that the ejector handles are not in the locked position. If necessary, press the red tabs and flip the ejector handles outward.
3. Place one hand underneath the Routing Engine to support it. With the other hand, grasp one of the ejector handles on the faceplate.
4. Carefully align the sides of the Routing Engine with the guides inside the opening on the CB.
5. Slide the Routing Engine into the CB until you feel resistance, then press the Routing Engine's faceplate until it engages the connectors.
6. Press both the ejector handles inward to seat the Routing Engine.

   The Routing Engine might require several minutes to boot.

7. After the Routing Engine boots, verify that it is installed correctly by checking the RE0 and RE1 LEDs on the craft interface. If the router is operational and the Routing Engine is functioning properly, the green OK LED lights steadily. If the red FAIL LED lights steadily instead, remove and install the Routing Engine again (see Removing an M120 Routing Engine and Installing an M120 Routing Engine). If the red FAIL LED still lights steadily, the Routing Engine is not functioning properly. Contact your customer support representative.

   To check the status of the Routing Engine, use the CLI command:

   
   

   user@host> show chassis routing-engine

   Routing Engine status:      Slot 0:     Current state                 Master ... 

   For more information about using the CLI, see the JUNOS Software documentation.