Replacing an M120 FEB

Removing an M120 FEB

Six FEBs are installed in the router. The FEBs are located in the rear of the chassis in the slots marked FEB0 through FEB5. Each FEB weighs approximately 4.5 lb (2.0 kg).

To remove a FEB (see Figure 1):

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.
3. Press and hold down the online/offline button on the FEB faceplate until the green OK LED goes out (about 5 seconds).
4. Loosen the captive screws (using a Phillips (+) screwdriver, number 2) on the ejector handles on each side of the FEB faceplate.
5. Flip the ejector handles outward to unseat the FEB.
6. Grasp both ejector handles, pull firmly, and slide the FEB about three-quarters of the way out of the chassis.
7. Place one hand underneath the FEB to support it and slide it completely out of the chassis. Place it on the antistatic mat.

   Caution: Do not stack hardware components on one another after you remove them. Place each component on an antistatic mat resting on a stable, flat surface.

Figure 1: Removing an M120 FEB

Installing an M120 FEB

To install a FEB (see Figure 2):

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. Place one hand underneath the FEB to support it. With the other hand, hold one of the ejector handles on the FEB faceplate.
3. Carefully align the sides of the FEB with the guides inside the chassis.
4. Carefully slide the FEB into the chassis, ensuring that it is correctly aligned.
5. Grasp both ejector handles and press them inward to seat the FEB.
6. Tighten the captive screws on the ejector handles.
7. Press the offline/online button until the green OK LED blinks to bring the FEB online.
8. To verify that the FEB is functioning normally, check the LEDs on its faceplate. The green OK LED should light steadily a few minutes after the FEB is installed. If the FAIL LED is lit steadily, remove and install the FEB again (see Removing an M120 FEB). If the FAIL LED still lights steadily, the FEB is not functioning properly. Contact your customer support representative.

   To check the status of the FEBs, issue the following CLI command:

   
   

   user@host> show chassis environment feb

Figure 2: Installing an M120 FEB