CHAPTER 8
Switch Fabric Components and
Descriptions
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M120 Forwarding Engine Boards (FEBs) Description on page 75
•
M120 Forwarding Engine Boards (FEBs) LEDs on page 77
M120 Forwarding Engine Boards (FEBs) Description
The M120 router provides redundant Forwarding Engine Boards (FEBs). The FPC (the
board that hosts the PICs) is separate from the FEB (the board that handles the packets).
FEBs provide route lookup and forwarding functions from FPCs and CFPCs. FPCs and
CFPCs are located on the front of the chassis, and provide power and management to
the PICs through the midplane. The midplane relays signals to the FEB (inserted from
the rear of the chassis, which processes the packets.
The midplane architecture allows any FEB to carry traffic for any FPC. You can configure
the mapping of FPCs to FEBs. If a FEB fails, a backup FEB can quickly take over packet
forwarding.
75Copyright © 2018, Juniper Networks, Inc.
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