Replacing a T640 LCC-CB

1. Removing a T640 LCC-CB
2. Installing a T640 LCC-CB

Removing a T640 LCC-CB

The router can have up to two LCC-CBs. They are located in the upper rear of the chassis in the slots marked CB0 and CB1. Each LCC-CB weighs approximately 5 lb (2.3 kg).

Caution: Before you replace an LCC-CB, you must take the host subsystem offline. If there is only one host subsystem, taking the host subsystem offline shuts down the router.

The backup LCC-CB is hot-removable and hot-insertable.

Caution: If the LCC-CB to be replaced is associated with the Routing Engine currently functioning as the master Routing Engine, switch it to the backup before removing the LCC-CB.

To remove an LCC-CB (see Figure 1):

1. Take the host subsystem offline. See Taking the T1600 Host Subsystem Offline .
2. Place an electrostatic bag or antistatic mat on a flat, stable surface.
3. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
4. Loosen the captive screws (using a Phillips (+) screwdriver, number 2) on the ejector handles on both sides of the LCC-CB faceplate.
5. Flip the ejector handles outward to unseat the LCC-CB.
6. Grasp the ejector handles and slide the LCC-CB about halfway out of the chassis.
7. Place one hand underneath the LCC-CB to support it and slide it completely out of the chassis.
8. Place the LCC-CB on the antistatic mat.
9. If you are not replacing the LCC-CB now, install a blank panel over the empty slot.

Figure 1: Removing an LCC-CB

Installing a T640 LCC-CB

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. Carefully align the sides of the LCC-CB with the guides inside the chassis.
3. Slide the LCC-CB into the chassis, carefully ensuring that it is correctly aligned.
4. Grasp both ejector handles, and press them inward to seat the LCC-CB.
5. Tighten the captive screws on the ejector handles, using a Phillips (+) screwdriver, number 2.

6. Verify that the LCC-CB is functioning normally:

   • Check the LEDs on the LCC-CB faceplate. The green OK LED should light steadily a few minutes after the LCC-CB is installed. If power is applied to the Routing Engine and its corresponding LCC-CB is functioning normally, the LCC-CB comes online automatically.

     If the FAIL LED is lit steadily, remove and install the LCC-CB again. If the FAIL LED still lights steadily, the LCC-CB is not functioning properly. Contact your customer support representative.

   • Use the show chassis environment cb command to check the status of the LCC-CB.

Figure 2: Installing an LCC-CB