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Installing Modules
CAUTION: Ifyoudonotusethehalt command before removing or powering down
an SRP, the syst
em’s NVS card can become corrupted.
1. Enter the halt command.
See JUNOSe System Basics Configuration Guide, Chapter 6, Managing Modules for
information about the halt com m and.
WARNING: Turn
off the router before you i nstall the redundancy midplane. Working
inside the router when it is on can lead to electric shock and serious burns.
2. Turn off the power switches located on the power input module in the rear
of th e system (Figure 22).
3. Remove the I/O modules from the slots that the redundancy midplane will
span.
4. Place the redundancy midplane in the chassis so that it rests against the guides
below the chassis midplane (Figure 22).
5. Align the screw holes in the redundancy midplane with the screw holes in the
guides so that the midplane covers the slots for the redundancy group.
6. Using a Phillips screwdriver and the screws provided, loosely attach, but do not
tighten, the redundancy midplane to the guides.
7. Carefully insert an I/O module in one slot to ensure that the redundancy
midplane is aligned correctly; then tighten the screws.
CAUTION: A misa lign ed redundancy midpl ane can result in b e n t pins on the
backplane an
d midplane and poor contact between the I/O modules and the
redundancy midplane.
Installing Components for Line Module Redundancy 49