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Removing a Routing Engine from an M20 Router
To remove a Routing Engine from an M20 router:
Place an electrostatic bag or antistatic mat on a flat, stable
surface to receive the Routing Engine.
an electrostatic discharge (ESD) grounding strap to your bare wrist and connect
the strap to one of the ESD points on the chassis. Make sure the router is
attached to a proper earth ground.
- If two Routing Engines are installed, check whether the
Routing Engine you are removing is the master. If so, switch mastership
to the standby Routing Engine. For instructions, see Switching Routing Engine Mastership on an M20 Router.
- Use one of the following methods to request a system
halt on the M20 router:
- Press the square RE0 or RE1 button to
the right of the Routing Engine. This shuts down the Routing Engine
cleanly, so that its state information is preserved.
- On the console or other management device connected to
the Routing Engine, enter CLI operational mode and issue the following
- user@host> request system halt
The command shuts down the Routing Engine cleanly,
so that its state information is preserved.
Wait to continue until a message appears on the console confirming
that the operating system has halted.
- If applicable, loosen the screws on the
extractor clips at either end of the Routing Engine faceplate, using
a Phillips screwdriver.
- Using your
thumbs, push and hold the red tab on each extractor clip toward the outer
edge of the unit. Push the ends of the extractor clips outward to unseat the
Routing Engine from the chassis.
- Grasp the extractor clips and slide the unit about halfway
out of the chassis.
Slide the Routing Engine straight out of the chassis. Damage can result
if the Routing Engine gets lodged because of uneven movement.
- Place one hand under the Routing Engine to support it,
slide it completely out of the chassis, and place it on the antistatic mat
or in the electrostatic bag.
Figure 5: Removing
a Routing Engine from an M20 Router
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