Host Subsystem; Switch Control Board - Juniper SRX 5600 Hardware Manual

Table 10: SPC LEDs (continued)
Two LEDs, located on the craft interface above the SPC, display the status of the SPC
and are labeled
craft interface, see "IOC and SPC LEDs" on page 26.

Host Subsystem

The host subsystem consists of a routing engine installed in a switch control board
(SCB). The host subsystem provides the routing and system management functions
of the services gateway. You must install one host subsystem on the device. Each
host subsystem functions as a unit; the Routing Engine must be installed directly
into the Switch Control Board. For more information about the host subsystem
components, see "Switch Control Board" on page 17 and "Routing Engine" on page
19.
The 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 about the
host subsystem LEDs, see "Host Subsystem LEDs" on page 25.

Switch Control Board

The Switch Control Board (SCB) provides the following functions:
When the SCB is part of a host subsystem, the Routing Engine installs directly into
a slot on the SCB (see Figure 11 on page 18).
Label Color
Green
ENABLE
and
OK FAIL
Powers on and powers off IOCs and SPCs
Controls clocking, system resets, and booting
Monitors and controls system functions, including fan speed, board power status,
PDM status and control, and the system front panel
Provides interconnections to all the IOCs within the chassis through the switch
fabrics integrated into the SCB
State Description
On steadily The Chassis Cluster Control port is enabled.
Off The Chassis Cluster Control port is disabled.
. For more information on the SPC LEDs located on the
Chapter 2: Hardware Components
17
Host Subsystem