Replacing a Routing Engine in an M40e Router

The router can have a Routing Engine in each of the slots labeled RE0 and RE1 at the rear of the chassis, as shown in Figure 1. Each Routing Engine weighs approximately 1.5 lb (0.7 kg).

The Routing Engines are hot-pluggable. For a description of the effect of removing a Routing Engine, see Host Module Components in M40e Routers.

To remove a Routing Engine from an M40e router:

1. Place an electrostatic bag or antistatic mat on a flat, stable surface.
2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis. Verify that the router is attached to a proper earth ground.
3. Remove the rear component cover by loosening the thumbscrews at the corners of the cover and pulling it straight off of the chassis.
4. If two host modules are installed, check whether the Routing Engine you are removing belongs to the master host module. If so, switch mastership to the standby host module. For instructions, see Switching Host Module Mastership on an M40e Router.
5. On the console or other management device connected to the Routing Engine that you are removing, enter CLI operational mode and issue the following command:

   user@host> request system halt

   The command shuts down the Routing Engine cleanly, so that its state information is preserved.

   Wait to continue until a message appears on the console confirming that the operating system has halted.

6. If applicable, loosen the screws on the extractor clips on either side of the Routing Engine faceplate, using a Phillips screwdriver (see Figure 3).
7. Flip the ends of the extractor clips outward (see Figure 3).
8. Grasp the extractor clips and slide the unit about halfway out of the chassis.  

   Caution: Be careful to slide the Routing Engine straight out of the chassis. Damage can result if the Routing Engine gets lodged because of uneven movement.

9. Place one hand under the Routing Engine to support it, slide it completely out of the chassis, and place it on an antistatic mat or in an electrostatic bag.

   Figure 3: Removing a Routing Engine from an M40e Router

   

To install a Routing Engine in an M40e router:

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. Verify that the router is attached to a proper earth ground.
2. Verify that the extractor clip at each end of the Routing Engine is flipped toward the outer edge of the unit. If necessary, use your thumbs to push and hold the red tab on each extractor clip toward the outer edge, and then push the ends of the extractor clips outward.
3. Place one hand under the Routing Engine to support it and grasp one of the extractor clips on the faceplate with the other hand.
4. Align the rear of the Routing Engine with the guide rails inside the chassis and slide it in completely.

   Caution: Align the Routing Engine carefully with the guide rails and push it in evenly. Damage can result if the Routing Engine gets lodged in the rails because of uneven movement.

5. Press the extractor clip at each end of the Routing Engine inward to seat the unit firmly in the chassis.
6. If applicable, tighten the screws on the extractor clips, using a Phillips screwdriver. Be sure to tighten the screws enough to seat the Routing Engine properly.

   The Routing Engine might require several minutes to boot.

7. After the Routing Engine boots, check the host module LEDs on the craft interface to verify that the green LED labeled ONLINE is lit for the host module to which the Routing Engine belongs.

   You can also issue the following CLI command to verify correct Routing Engine functioning:

   user@host> show chassis routing-engine

   For further information, see the JUNOS System Basics and Services Command Reference.

8. Reinstall the rear component cover and tighten the thumbscrews at the corners to secure it to the chassis.

   Figure 4: Installing a Routing Engine in an M40e Router