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Replacing an MCS in an M40e Router
The router can have an MCS in each of the slots labeled MCS0 and MCS1 at the rear of the chassis, as shown
in Figure 1. Each MCS weighs
approximately 2.5 lb (1 kg).
The MCSs are hot-pluggable. For a description of the effect
of removing an MCS, see Host Module Components in M40e Routers.
To remove an MCS from an M40e router:
- Place an electrostatic bag or antistatic mat on a flat, stable surface.
an electrostatic discharge (ESD) grounding strap to your bare wrist
and connect the strap to one of the ESD points on the chassis. Verify
that the router is attached to a proper earth ground.
- Remove the rear component cover by loosening the thumbscrew
at each corner of the cover and pulling it straight off the chassis.
- If two host modules are installed, check whether
the MCS 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 is paired with the MCS you are removing,
enter CLI operational mode and issue the following command:
- user@host> request system halt
The command shuts down the Routing Engine cleanly,
so its state information is preserved.
Wait to continue until a message appears on the console confirming
that the operating system has halted.
- Push the end of each extractor clip (located at each end of
the MCS) outward.
- Grasp the extractor clips and slide the MCS about
halfway out of the chassis.
- Place one hand under the MCS 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
an MCS from an M40e Router
To install an MCS in an M40e router:
- Attach an electrostatic discharge (ESD) grounding strap to your bare
wrist and connect the strap to one of the ESD points on the chassis.
- Place one hand under the MCS to support it and grasp one of
the extractor clips on the faceplate with the other hand.
- Align the rear of the MCS with the guides inside
the chassis and slide it in completely.
- Press the extractor clip at each end of the MCS
- Verify that the green LED
labeled OK on the MCS faceplate is lit. Also 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 MCS belongs.
You can also issue the following CLI command to verify correct
Routing Engine functioning:
- user@host> show chassis environment mcs
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 6: Installing
an MCS in an M40e Router
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