Table 15: Routing Engine C1800 LEDs
(continued)
Description
State
Color
Label
Not applicable.
On steadily
Green
DISK2
NOTE:
DISK2
is not currently supported.
Off
—
Routing Engine is functioning normally.
On steadily
Green
ONLINE
Routing Engine is not functioning normally.
On steadily
Red
Routing Engine is not online or not functioning
normally.
Off
—
Indicates activity on the USB port.
On steadily
Green
USB
There is no activity on the USB port.
Off
—
Related
Documentation
T4000 Host Subsystem Description on page 35
•
•
T4000 Routing Engine Description on page 39
•
T4000 RE-C1800 Routing Engine Description on page 40
•
T4000 Craft Interface LEDs on page 25
T4000 PIC Description
PICs provide the physical connection to various network media types, receiving incoming
packets from the network and transmitting outgoing packets to the network. During this
process, each PIC performs framing and line-speed signaling for its media type. Before
transmitting outgoing data packets, the PICs encapsulate the packets received from the
FPCs. Each PIC is equipped with an ASIC that performs control functions specific to the
media type of that PIC.
The router supports various PICs, including ATM, Ethernet, and SONET/SDH interfaces.
Blank PICs resemble other PICs but do not provide any physical connection or activity.
When a slot is not occupied by a PIC, you must insert a blank PIC to fill the empty slot
and ensure proper cooling of the system.
PICs are hot-removable and hot-insertable. Type 2 PICs have captive screws at their
upper and lower corners. Type 3 PICs have an upper ejector handle and a lower captive
screw. Type 4 and Type 5 PICs have an upper ejector handle and a lower ejector handle.
Table 16 on page 42
indicates the number of PICs supported by each FPC.
Table 16: Number of PICs Supported in Each FPC
Maximum Number of PICs
FPC Model Number
FPC Name
4
T640-FPC2-ES
Enhanced Scaling FPC2
Copyright © 2013, Juniper Networks, Inc.
42
T4000 Router Hardware Guide
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