Figure 69: Removing an M120 Routing Engine
See Also M120 Routing Engine Description on page 22•
• M120 Routing Engine Interface Ports and Status Indicators on page 28
• Installing an M120 Routing Engine on page 197
Installing an M120 Routing Engine
To install a Routing Engine into a CB (see Figure 70 on page 198):
1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the
ESD points on the chassis.
2. Ensure that the ejector handles are not in the locked position. If necessary, press the
red tabs and flip the ejector handles outward.
3. Place one hand underneath the Routing Engine to support it. With the other hand,
grasp one of the ejector handles on the faceplate.
4. Carefully align the sides of the Routing Engine with the guides inside the opening on
the CB.
5. Slide the Routing Engine into the CB until you feel resistance, then press the Routing
Engine's faceplate until it engages the connectors.
6. Press both the ejector handles inward to seat the Routing Engine.
The Routing Engine might require several minutes to boot.
7. After the Routing Engine boots, verify that it is installed correctly by checking the RE0
and RE1 LEDs on the craft interface. If the router is operational and the Routing Engine
is functioning properly, the green OK LED lights steadily. If the red FAIL LED lights
steadily instead, remove and install the Routing Engine again. If the red FAIL LED still
197Copyright © 2018, Juniper Networks, Inc.
Chapter 26: Replacing Host Subsystem Components