Replacing, Upgrading, and Downgrading the M7i CFEB and CFEB-E

Removing the M7i CFEB and CFEB-E

To remove the CFEB or CFEB-E (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 the ONLINE/OFFLINE button on the faceplate of the CFEB or CFEB-E until the green OK LED turns off, which takes about 5 seconds.
4. Loosen the thumbscrew on each ejector locking tab (shown in M7i Compact Forwarding Engine Board (CFEB) and Enhanced Compact Forwarding Engine Board (CFEB-E) Description), using a Phillips screwdriver if necessary.
5. Pull the ends of the ejector handles outward until they are nearly perpendicular to the faceplate of the CFEB or CFEB-E.
6. Grasp the ejector handles and pull firmly to slide the CFEB or CFEB-E about halfway out of the chassis.
7. Place one hand under the CFEB or CFEB-E to support it, slide it completely out of the chassis, and place it on the antistatic mat or in the electrostatic bag.

   Caution: When a CFEB or CFEB-E is out of the chassis, do not hold it by the ejector handles. They cannot support its weight. Do not stack CFEBs or CFEB-Es on top of or under other components. Place each one individually in an electrostatic bag or on its own antistatic mat on a flat, stable surface.

Figure 1: Removing the CFEB or CFEB-E

Installing the M7i CFEB and CFEB-E

To install the CFEB or CFEB-E (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. Verify that the ends of the ejector handles are pulled outward to a position nearly perpendicular to the faceplate of the CFEB or CFEB-E.
3. Place one hand under the CFEB or CFEB-E to support it and grasp one of the ejector handles at the front with the other hand.
4. Align the rear of the CFEB or CFEB-E with the guides inside the chassis and slide it in completely.
5. Press the ejector handle at each end of the CFEB or CFEB-E inward.
6. Tighten the thumbscrew on each ejector locking tab (shown in M7i Compact Forwarding Engine Board (CFEB) and Enhanced Compact Forwarding Engine Board (CFEB-E) Description) to seat the CFEB or CFEB-E firmly in the chassis.
7. Press and hold the ONLINE/OFFLINE button on the CFEB or CFEB-E faceplate until the green OK LED lights steadily.

   You can verify correct CFEB or CFEB-E functioning by issuing the show chassis cfeb command described in Maintaining the M7i CFEB and CFEB-E.

Figure 2: Installing a CFEB or CFEB-E

Upgrading and Downgrading the CFEB and CFEB-E

To upgrade by replacing a CFEB with a CFEB-E or to downgrade by replacing a CFEB-E with a CFEB requires a system reboot after swapping the CFEB devices.

To upgrade from a CFEB to a CFEB-E or downgrade from a CFEB-E to a CFEB:

1. Remove the CFEB or CFEB-E as described in Removing the M7i CFEB and CFEB-E.
2. Install the upgrade CFEB-E or downgrade CFEB as described in Installing the M7i CFEB and CFEB-E.
3. Reboot the router by issuing the following CLI command:
   
   

   user@host> request system reboot

After the reboot, the router recognizes the new CFEB or CFEB-E.