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Figure 21: Airflow Through the J4350 and J6350 Chassis
Software Overview
Each J-series Services Router runs the JUNOS software on its general-purpose
processors. Designed for the large production networks typically supported by Internet
service providers (ISPs), the JUNOS software includes processes for Internet Protocol
(IP) routing and for managing interfaces, networks, and the router chassis.
The JUNOS software runs on the Routing Engine. The Routing Engine kernel
coordinates communication among the JUNOS software processes and provides a
link to the Packet Forwarding Engine.
With the J-Web interface and the command-line interface (CLI) you configure the
routing protocols that run on the Services Router and set the properties of its network
interfaces. After activating a software configuration, use either user interface to
monitor the protocol traffic passing through the router, manage operations, and
diagnose protocol and network connectivity problems.
This section contains the following topics:
■ Routing Engine and Packet Forwarding Engine on page 40
■ Kernel and Microkernel on page 40
■ JUNOS Software Processes on page 40
■ User Interfaces on page 41
Software Overview ■ 39
Chapter 2: System Overview