Replacing An Sfm; Removing An Sfm - Juniper Internet Router M160 Hardware Manual

M160 Internet Router Hardware Guide

Replacing an SFM

Up to four SFMs can be installed in the router, processing a total of 160 Mpps.
The SFMs are hot-pluggable, as described in Field-Replaceable Units (FRUs) on
page 4. Removing or inserting an SFM causes a brief interruption in forwarding
performance (about 500 ms) as the Packet Forwarding Engine reconfigures the
distribution of packets across the remaining SFMs.
To replace an SFM, perform the following procedures:

Removing an SFM

To remove an SFM, follow this procedure (see Figure 96):
1.
2.
3.
4.
5.
6.
7.
8.
CAUTION: When an SFM is out of the chassis, do not hold it by the ejector handles.
They cannot support its weight.
Do not stack SFMs on top of or under other components. Place each one individually
in an electrostatic bag or on its own antistatic mat on a flat, stable surface.
188
Replacing Packet Forwarding Engine Components
Removing an SFM on page 188
Installing an SFM on page 189
Remove the rear component cover by loosening the thumbscrew at each
corner of the cover and pulling it straight off the chassis. For complete
instructions, see "Removing the Rear Component Cover" on page 86.
Place an electrostatic bag or antistatic mat on a flat, stable surface.
Attach 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. For more information about ESD, see
"Preventing Electrostatic Discharge Damage" on page 226.
Press and hold the offline button on the SFM faceplate until the amber LED
labeled lights, in about 5 seconds.
FAIL
Loosen the thumbscrew on each ejector locking tab (shown in Figure 8), using
a Phillips screwdriver if necessary.
Pull the end of each ejector handle outward until it is nearly perpendicular to
the SFM faceplate.
Grasp the ejector handles and pull firmly to slide the SFM about halfway
out of the chassis.
Place one hand under the SFM to support it, slide it completely out of the
chassis, and place it on the antistatic mat or in the electrostatic bag.