Juniper Networks M160 manual Routing Engine Architecture

System Architecture Overview

Figure 23: Packet Forwarding Engine Components and Data Flow

Packet

in

Packet

out

Controller

PIC

	Midplane
FPC	SFM
	Distributed
I/O	Buffer
	Manager
Manager
	Internet
	Processor II
Packet
Director
	Routing
	Engine

= ASIC

1234

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 24).

The Routing Engine has a dedicated 100-Mbps internal connection to the Packet Forwarding Engine.

Routing Engine Architecture 53