Replacing Hardware Components
6. On the console or other management deviceconnected to the Routing Engine
that is paired with the CB you are removing, ent er CLI operational mode and
issue the following command. The command shuts down the Routing Engine
cleanly, so its state information is preserved:
user@host> request system halt
NOTE: Waituntil a message appears on the console confirmingthat the operating
system has halted.
For more informationabout the command, see the JUNOS Protocols, Class of
Service, and System Basics Command Reference.
7. Push the end of each extractor clip (located at each end of the MCS) outward.
8. Grasp the extractor clips and slide the MCS about halfway out of the chassi s.
9. Place one hand underthe MCS to support it, slide it completely outof the
chassis, and place it on the antistatic mat or in the elec trostatic bag.
Figure 81: Removing an MCS
PCG 0
SFM 0
SFM 1
MCS 0
RE 0
1928
Extractor clip
Installing an MCS
To installan MCS, follow this procedure(see Figure 82):
1. Attach an electrostatic discharge (ESD) grounding strap to your bare wris t and
connect the strap toone of the ESD points on the chassis. Make sure the router
is attached to a proper earth ground. For more information about ESD, see
“Preventing ElectrostaticDischarge Damage” on page 226.
Replacing Host Module Components 161