Figure 46: Removing a CCG
Installing a Centralized Clock Generator
To install a replacement CCG (see Figure 47 on page 159):
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 CCG with the guides in the CCG slot.
3. Grasp the CCG by its handle and slide it straight into the chassis until it contacts the
midplane.
4. Tighten the captive screws on the corners of the CCG faceplate.
5. To bring the CCG online, press the online/offline button until the green OK LED lights.
6. To verify that the CCG is installed correctly and is functioning normally, check the
LEDs on the CCG faceplate. The green OK LED should light steadily. If the CCG is the
master, the blue MASTER LED should also light steadily.
To check the status of the CCGs, use the following CLI command:
user@host> show chassis environment ccg
For more information about using CLI commands, see the Junos OS System Basics and
Services Command Reference.
Figure 47: Installing a CCG
159Copyright © 2012, Juniper Networks, Inc.
Chapter 15: Replacing Packet Transport Switch Hardware Components
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