Juniper Networks J4350, J6350 User Interfaces, Junos Software Processes, Process Name Description

Chapter 2: System Overview

Table 17: JUNOS Software Processes

Process	Name	Description
Management	mgd	Manages the Services Router system as follows:
process		■ Provides communication between the other processes and an interface to the
		configuration database
		■ Populates the configuration database with configuration information and retrieves
		the information when queried by other processes to ensure that the system
		operates as configured
		■ Interacts with the other processes when commands are issued through one of
		the user interfaces on the router
Chassis	chassisd	Controls a Services Router chassis and its components as follows:
process		■ Detects hardware on the system that is used to configure network interfaces
		■ Monitors the physical status of hardware components and field-replaceable units
		(FRUs), detecting when environment sensors such as temperature sensors are
		triggered
		■ Relays signals and interrupts—for example, when devices are taken offline, so
		that the system can close sessions and shut down gracefully
Routing	rpd	Defines how routing protocols such as RIP, OSPF, and BGP operate on the router,
protocol		including selecting routes and maintaining fowarding tables.
process
Interface	dcd	Supplies the programs that configure and monitor network interfaces by defining
process (also		physical characteristics such as link encapsulation, hold times, and keepalive timers.
called device
control
process)
Forwarding	fwdd	Responsible for most of the packet transmission through a Services Router. The overall
process		performance of the router is largely determined by the effectiveness of the forwarding
		process.

User Interfaces

The user interfaces on a Services Router interact with the management process to execute commands and store and retrieve information from the configuration database. The user interfaces operate as clients that communicate with the JUNOS software through an application programming interface (API).

The following primary user interfaces are shipped with the router:

■J-Web graphical user interface—Includes quick configuration capabilities for performing the minimum required steps to enable a feature, plus a built-in configuration editor with access to the entire configuration hierarchy to fully configure the router. The J-Web interface also provides tools for monitoring, managing, and diagnosing router operation.

■Command-line interface (CLI)—Grants access to the complete JUNOS command and configuration hierarchies, to monitor the router, diagnose problems, and configure it completely.

Software Overview ■ 41