Juniper Networks MX480 - Manual (Page 50)

MX480 Host Subsystem Description
The host subsystem provides the routing and system management functions of the
router. You can install one or two host subsystems on the router. Each host subsystem
functions as a unit; the Routing Engine must be installed directly into the Switch Control
Board.
NOTE: We recommend that you install two host subsystems for redundant
protection. If you install only one host subsystem, we recommend that you
install it in slot
0 .
Each host subsystem has three LEDs that display its status. The host subsystem LEDs
are located on the upper left of the craft interface.
Related
Documentation
MX480 Host Subsystem LEDs on page 26 •
• Maintaining the MX480 Host Subsystem on page 128
• Taking an MX480 Host Subsystem Offline on page 172
MX480 Host Subsystem LEDs
Each host subsystem has three LEDs that display its status. The host subsystem LEDs
are located on the upper left of the craft interface. For more information, see
“Host
Subsystem LEDs on the MX480 Craft Interface” on page 38 .
Related
Documentation
MX480 Host Subsystem Description on page 26 •
• Maintaining the MX480 Host Subsystem on page 128
• Taking an MX480 Host Subsystem Offline on page 172
MX480 Switch Control Board (SCB) Overview
• MX480 Switch Control Board (SCB) Description on page 26
• MX480 Switch Control Board (SCB) LEDs on page 28
• MX480 Enhanced Switch Control Board Description on page 29
• MX480 Enhanced Switch Control Board LEDs on page 30
MX480 Switch Control Board (SCB) Description
The Switch Control Board (SCB) provides the following functions::
• Powers on and powers off DPCs, FPCs, and MPCs
• Controls clocking, system resets, and booting
Copyright © 2013, Juniper Networks, Inc. 26
MX480 3D Universal Edge Router Hardware Guide