Juniper-networks M5 User Manual Page 51

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Routing Engine Ar
chitecture
Figure 13: Packet Forwarding Engine Components and Data Flow
1335
= ASIC
Routing
Engine
Midplane
PIC
Controller
PIC
Controller
Packet
out
Packet
in
Distributed
Buffer
Manager
Distributed
Buffer
Manager
FEB
Internet
Processor
II
I/O
Manager
Routing E
ngine Architecture
The Routing Engine is an Intel-based PCI platform running the JUNOS Internet software,
which Ju
niper N etworks has developed and optimized to handle large num bers of network
interfaces and routes. The software consists of a set of system processes running in protected
memory m odules on top of an independent operating system. The JUNOS kernel supports
JUNOS sy
stem processes, which handle system managemen t processes, routing protocols,
and control functions (see Figure 14).
The Rout
ing Engine has a dedicated 100-Mbps internal connection to the Packet Forwarding
Engine.
System Architecture Overview
31
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