The command shuts down the Routing Engine cleanly, so its state information is
preserved. For more information about the command, see the Junos OS System Basics
and Services Command Reference.
NOTE: The SIBs might continue forwarding traffic for approximately 5
minutes after the request system halt command has been issued.
Removing a PTX5000 Routing Engine
The PTX5000 Packet Transport Switch can have one or two Routing Engines. They are
located in a slot inside the control board below the SIBs in the rear of the chassis . Each
Routing Engine can weigh up to 10.1 lb (4.6 kg).
To remove a Routing Engine (see Figure 80 on page 206):
1. If the Routing Engine to be replaced is currently functioning as the master Routing
engine, switch it to be the backup before removing it.
2. Take the host subsystem offline. If there is only one host subsystem, taking the host
subsystem offline shuts down the packet transport switch.
3. Place an electrostatic bag or antistatic mat on a flat, stable surface.
4. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
the strap to one of the ESD points on the chassis.
5. Take the host subsystem offline.
6. Press the red tabs on the ejector handles on both sides of the Routing Engine faceplate.
7. Flip the ejector handles outward to unseat the Routing Engine.
8. Grasp the Routing Engine by the ejector handles and slide it about halfway out of the
chassis.
9. Place one of your hands underneath the Routing Engine to support it and slide it
completely out of the chassis.
10. Place the Routing Engine on the antistatic mat.
205Copyright © 2012, Juniper Networks, Inc.
Chapter 15: Replacing Packet Transport Switch Hardware Components
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