Juniper Networks M160 manual Replacing an SFM, Removing an SFM

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-ReplaceableUnits (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 on page 188

Installing an SFM on page 189

Removing an SFM

To remove an SFM, follow this procedure (see Figure 96):

1.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.

2.Place an electrostatic bag or antistatic mat on a flat, stable surface.

3.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.

4.Press and hold the offline button on the SFM faceplate until the amber LED labeled FAIL lights, in about 5 seconds.

5.Loosen the thumbscrew on each ejector locking tab (shown in Figure 8), using a Phillips screwdriver if necessary.

6.Pull the end of each ejector handle outward until it is nearly perpendicular to the SFM faceplate.

7.Grasp the ejector handles and pull firmly to slide the SFM about halfway out of the chassis.

8.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.

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