which a PIC can be installed. An FPC can be installed into any FPC slot on the router,
regardless of which PICs it contains.
If a slot is not occupied by an FPC, an FPC blank panel must be installed to shield the
empty slot and to allow cooling air to circulate properly through the router.
FPCs are hot-removable and hot-insertable, as described in “M120 Field-Replaceable
Units (FRUs)” on page 179. When you install an FPC into a functioning router, the Routing
Engine downloads the FPC software, the FPC runs its diagnostics, and the PICs housed
on the FPC, are enabled. Forwarding on other FPC slots continues uninterrupted during
this process.
Figure 16: FPC and CFPCs Installed in an M120 Router Chassis
Faceplates on FPCs for the M120 router are labeled with the FPC type (FPC1, FPC2, or
FPC3). The faceplates on the CFPCs are labeled with their CFPC type, Ethernet 10GBASE
XFP or OC192.
Figure 17 on page 53 shows the three types of FPCs that the M120 router supports.
Copyright © 2018, Juniper Networks, Inc.52
M120 Multiservice Edge Router Hardware Guide
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