Juniper Networks M5, M10 manual Routing Engine Architecture

Routing Engine Architecture

Figure 13: Packet Forwarding Engine Components and Data Flow

PIC

Packet

Midplane

Routing

in

Controller

PIC

	Distributed
	Buffer
	Manager
I/O	Internet
	Processor
Manager
	II
	Distributed

Engine

Packet Controller out

Buffer

Manager

= ASIC

1335

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.

System Architecture Overview 31