Report an Error]
Replacing a Routing Engine on an M40e Router
The router can have a Routing Engine in each of the slots labeled RE0 and RE1 at
the rear of the chassis, as shown in Figure 3.
Each Routing Engine weighs approximately 1.5 lb (0.7 kg).
The Routing Engines are hot-pluggable. For a description of the effect
of removing a Routing Engine, see Host Module Components on M40e Routers.
Removing a Routing Engine from an M40e Router
To remove a Routing Engine from an M40e router, follow this procedure:
Place an electrostatic bag or antistatic mat on a flat, stable surface
to receive the Routing Engine.
- Attach an ESD strap to your bare wrist and connect the
strap to one of the ESD points on the chassis.
- Remove the rear component cover by loosening the thumbscrews
at the corners of the cover and pulling it straight off of the chassis.
- If two host modules are installed, check whether the Routing
Engine you are removing belongs to the master host module. If so, switch mastership
to the standby host module. For instructions, see Switching
Host Module Mastership on an M40e Router.
- On the console or other management device connected to
the Routing Engine that you are removing, enter CLI operational mode and issue
the following command. The command shuts down the Routing Engine cleanly,
so that its state information is preserved:
- user@host> request system halt
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
on either side of the Routing Engine faceplate, using a Phillips screwdriver
(see Figure 7).
- Flip the ends of the extractor clips outward (see Figure 7).
- Grasp the extractor clips and slide the unit about halfway
out of the chassis.
Be careful to slide the Routing Engine straight out of the chassis.
Damage can result if it 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 prepared in Step Step 1.
Figure 7: Removing
a Routing Engine from an M40e Router
Installing a Routing Engine in an M40e Router
To install a Routing Engine in an M40e router, follow this procedure:
- Attach an ESD strap to your bare wrist and connect
the strap to one of the ESD points on the chassis.
- Place one hand under the Routing Engine to support it and
grasp one of the extractor clips on the faceplate with the other hand.
- Align the rear of the Routing Engine with the guide rails
inside the chassis and slide it in completely (see Figure 8).
Be careful to align the Routing Engine correctly with the guide rails
and push it in evenly. Damage can result if it gets lodged because of uneven
- Press the extractor clips on the left and right sides of
the Routing Engine inward.
- If applicable, tighten the screws on the extractor clips,
using a Phillips screwdriver. Be sure to tighten the screws enough to seat
the Routing Engine properly.
The Routing Engine might require several minutes to boot.
- After the Routing Engine boots, check the host module LEDs
on the craft interface to verify that the green LED labeled ONLINE is
lit for the host module to which the Routing Engine belongs.
You can also issue the following CLI command to verify correct Routing
- user@host> show chassis routing-engine
For further information, see the JUNOS System Basics and Services Command Reference.
- Reinstall the rear component cover and tighten the thumbscrews
at the corners to secure it to the chassis.
Figure 8: Installing
a Routing Engine in an M40e Router
Report an Error]