This document describes how to remove and replace a Flexible PIC Concentrator (FPC) on a
Juniper Networks M20, M40, M40e, or M160 Internet router.
For additional installation and configuration information, refer to the following
documentation:
! M20 Internet Router Hardware Guide
! M40 Internet Router Hardware Guide
! M40e Internet Router Hardware Guid e
! M160 Internet Router Hardware Guide
! JUNOS Internet Software Operational Mode Command Reference
! JUNOS Internet so ftware configuration guides
The FPCs on a router house the Physical Interface Cards (PICs), which connect the router to
network media. The I/O Manager ASIC or ASICs on the FPC acc epts incoming data packets
from the PICs on the FPC and divides each packet into 64-byte cells. The cells cross the
midplane to the SFM, where another ASIC de cides how to distribute them among the
memory buffers located on and shared by all installed FPCs. After the SFM decides how to
forward a pa cket, the I/O Manager ASIC or ASICs on the FPC reassembles the corresponding
data cells back into network-packet form and passes the packet to the appropriate PIC for
transmission to the network.
FPCs are hot-insertable and hot-removable. When you remove or install an FPC, packet
forwarding halts for about 200ms while the Packet Forw arding Engin e ad j us ts to the change
in the amount of memory available in the pool located on and shared by all FPCs. 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 continues
uninterrupted during this process.
An FPC can be installed into any FPC slot, regardless of the PICs it contains, and any
combination of slots can be used. If a slot is empty, you must install a blank FPC panel to
shield it, so th at cooling air can circulate properly throughout the card cage.
For a description of the FPCs supported on each router, see the following sections:
! M20 FPC Description on page 3
! M40 FPC Description on page 4
! M40e FPCs De scription on page 5
! M160 FPCs Description on page 7
FPC Installation Instructions
2
FPC Description
M20 FPC Description
In an M20 router, up to four FPCs install horizontally into the midplane from the front of the
chassis, below th e System and Sw itch Boar d (SSB). Each FPC is referenc ed by the number of
the slot in which it is installed. The slot numbers range from FPC0 through FPC3, from top to
bottom in the chassis. Each FPC accommodates up to four PICs. Figure 1 shows a chassis
with FPCs—each housing four PICs—installed in all four slots.
Figure 1: M20 Router with Four FPCs Installed
FPC0
FPC1
FPC2
FPC3
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FPC Installation Instructions
3
FPC Description
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M40 FPC Description
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Figure 2: M40 Router with FPC Installed in Slot FPC7
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In an M40 router, up to eight FPCs install vertically into the backplane from the front of the
chassis, four on either side o f t h e System Control Board ( S CB ) . Each FPC is referen ced by the
number of the slot in which it is installed. The slot numbers range from FPC0 through FPC7,
from left to right in the chassis. Each FPC can accommodate up to four PICs. Figure2 shows
an FPC housing four PICs installed in slot FPC7.
FPC
PICs
(installed in FPC)
FPC LEDs
1060
FPC Installation Instructions
4
FPC Description
M40e FPCs Description
In an M40e router, up to eight FPCs install vertically into the midplane from the front of the
chassis. Each FPC is referenced by the number of the slot in which it is installed. The slot
numbers range from FPC0 through FPC7, from left to right in the chassis.
The M40e router supports the three types of FPC shown in Figure 3:
! M40e-FPC—Accommodates up to four PICs of the type also supported on
M20 and M40 routers.
! M40e-FPC1—Accommodates up to four lower-speed PICs such as single-port OC-12 and
Gigabit Ethernet interfaces. The offline button for each PIC is on the FPC card carrier.
! M40e-FPC2—Accommodates one higher-speed PIC, such as an OC-48/STM-16 interface.
The lower three slots in the M40e-FPC2 are covered by a blank panel. The offline button
for the PIC is on the PIC faceplate.
Figure 3: M40e-FPC, M40e-FPC1, and M40e-FPC2
M40e - FPC1
Ejector lever
Offline
buttons
(on FPC)
Ejector lever
Ejector lever
Offline
button
Ejector lever
M40e - FPC2
Ejector lever
Ejector lever
M40e-FPC
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FPC Installation Instructions
5
FPC Description
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Any combination of the three types of FPC can be installed in the M40e router. Figure 4
shows an M40e router with an M40e-FPC1 (housing four PICs) installed in slot FPC0.
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Figure 4: M40e Router with an M40e-FPC1 Installed in Slot FPC0
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1909
FPC Installation Instructions
6
FPC Description
M160 FPCs Description
In an M160 router, up to eight FPCs install vertically into the midplane from the front of the
chassis. Each FPC is referenced by the number of the slot in which it is installed. The slot
numbers range from FPC0 through FPC7, from left to right in the chassis.
The M160 router supports the two types of FPC shown in Figure 5:
! FPC1—Accommodates up to four lower-speed PICs such as single-port OC-12 and
Gigabit Ethernet interfaces. The offline button for each PIC is on the FPC card carrier.
! FPC2—Accommodates up to four higher-speed PICs, such as OC-48, and Tunnel
interfaces. The offline button for each PIC is on the PIC faceplate.
Figure 5: FPC1 and FPC2 for the M160 Router
FPC 1
Ejector lever
Offline buttons
(on FPC)
Ejector lever
Any combination of the two FPC t ypes can be installed in the M160 router. The installation
and removal of the two FPC types is identical, so the instructions in this document refer to
both types simply as “FP C”.
Ejector lever
Offline buttons
(on PICs)
Ejector lever
FPC 2
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FPC Installation Instructions
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