T320 Routing Engine Description - Juniper Core Router T Series Hardware Manual

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T320 Routing Engine Description

Copyright © 2018, Juniper Networks, Inc.
Table 9: T320 Standard Control Board and T-CB LEDs (continued)
Label Color
Green
OK
T320 Chassis Description on page 13
Maintaining the T320 Control Boards on page 277
Replacing a T320 Standard Control Board or T-CB on page 208
The Routing Engine runs the Junos OS. Software processes that run on the Routing Engine
maintain the routing tables, manage the routing protocols used on the router, control
the router interfaces, control some chassis components, and provide the interface for
system management and user access to the router.
You can install one or two Routing Engines in the router. The Routing Engines install into
the upper rear of the chassis in the slots labeled
installed, one functions as the master and the other acts as the backup. If the master
Routing Engine fails or is removed, and the backup is configured appropriately, the backup
takes over as the master.
If the host system is redundant, the backup Routing Engine is hot-removable and
hot-insertable, but the master Routing Engine is hot-pluggable. A Routing Engine that is
not redundant is hot-pluggable. Each Routing Engine requires a control board to be
installed in the adjacent slot.
Engine does not power up without a control board present in the adjacent slot.
NOTE: The LEDs that report host module status (including Routing Engine
status) are on the craft interface rather than the Routing Engine faceplate.
NOTE: For specific information about Routing Engine components (for
example, the amount of DRAM), issue the
command.
NOTE: If two Routing Engines are installed, they must both be the same
hardware model.
Chapter 5: Host Subsystem Components and Descriptions
State Description
On steadily Control board is online and is functioning normally.
Blinking Control board is powering up, but not online.
and
RE0
installs below , and
RE0 CB0
show chassis routing-engine
. If two Routing Engines are
RE1
installs above . A Routing
RE1 CB1
33