Routing Engine Architecture; Figure 13: Packet Forwarding Engine Components And Data Flow - Juniper M10 Hardware Manual

Figure 13: Packet Forwarding Engine Components and Data Flow

Routing Engine Architecture

The Routing Engine is an Intel-based PCI platform running the JUNOS Internet software,
which Juniper Networks has developed and optimized to handle large numbers of network
interfaces and routes. The software consists of a set of system processes running in protected
memory modules on top of an independent operating system. The JUNOS kernel supports
JUNOS system processes, which handle system management processes, routing protocols,
and control functions (see Figure 14).
The Routing Engine has a dedicated 100-Mbps internal connection to the Packet Forwarding
Engine.
Midplane
PIC
Packet
Controller
in
PIC
Packet
Controller
out
= ASIC
Routing Engine Architecture
FEB
Distributed
Buffer
Manager
Internet
I/O
Processor
Manager
II
Distributed
Buffer
Manager
System Architecture Overview
Routing
Engine
31