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เอกสารอ้างอิง Network_10G ข้อ 4.3

CHAPTER 1

Junos OS Software Overview

• Junos OS Overview on page 3
• Junos OS Architecture Overview on page 5
• Router Hardware Components on page 7
• Junos OS Routing Engine Components and Processes on page 8
• List of Junos OS Processes on page 10
• Default Directories for Junos OS File Storage on the Network Device on page 17
• Junos OS Support for IPv4 Routing Protocols on page 19
• Junos OS Support for IPv6 Routing Protocols on page 20
• Junos OS Routing and Forwarding Tables on page 21
• Routing Policy Overview on page 22
• Junos OS Support for VPNs on page 23

• Configuring FIB Localization on page 23
• Allocating More Memory for Routing Tables, Firewall Filters, and Layer 3 VPN
Labels on page 29

Junos OS Overview

Juniper Networks provides high-performance network routers that create a responsive
and trusted environment for accelerating the deployment of services and applications
over a single network. The Junos operating system (Junos OS) is the foundation of these
high-performance networks. Unlike other complex, monolithic software architectures,
Junos OS incorporates key design and developmental differences to deliver increased
network availability, operational efficiency, and flexibility. These key advantages are:

• One operating system
• One software release
4.3.2
• One modular software architecture
One Operating System

Unlike other network operating systems that share a common name but splinter into
many different programs, Junos OS is a single, cohesive operating system that is shared
across all devices and product lines. This enables Juniper Networks engineers to develop

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