Routing Engines And Switch Fabric - Juniper EX8208 Hardware Manual

Figure 1: EX8208 Switch
Line cards
SRE0 module
SF module
SRE1 module
Line cards
Fan tray
AC power
supplies
The EX8208 switch has a chassis-level LCD panel that displays Routing Engine and switch fabric status as
well as chassis components' alarm information for rapid problem identification. The LCD panel provides
a user-friendly interface for performing initial switch configuration, rolling back a configuration, or restoring
the switch to its default settings. See LCD Panel in an EX8200 Switch.
The EX8208 chassis backplane distributes the data, control, and management signals to various system
components along with distributing power throughout the system.
See "Chassis Physical Specifications of an EX8208 Switch" on page

Routing Engines and Switch Fabric

Switching functionality, system management, and system control functions of an EX8208 switch are
performed by a Switch Fabric and Routing Engine (SRE) module. See
(SRE) Module in an EX8208 Switch" on page
fabric. The SRE modules are field-replaceable units (FRUs) that are installed in the front of the chassis in
LCD Chassis ESD
panel status LEDs point
78. An SRE module contains a Routing Engine and switch
Front-mounting
bracket
Lift handle
33.
"Switch Fabric and Routing Engine
23