The Junos interface process communicates with the interface process in the Packet
Forwarding Engine through the Junos kernel, enabling the Junos OS to track the status
and condition of router interfaces.
Chassis Process
The Junos chassis process allows you to configure and control the properties of the router,
including conditions that trigger alarms and clock sources. The chassis process
communicates directly with a chassis process in the Junos kernel.
SNMP and MIB II Processes
The Junos OS supports the Simple Network Management Protocol (SNMP), versions 1,
2, and 3, which provides a mechanism for monitoring the state of the router. This software
is controlled by the Junos SNMP and Management Information Base (MIB) II processes,
which consist of an SNMP master agent and a MIB II agent.
Management Process
The management process starts all the other Junos OS processes and the CLI when the
router boots. It monitors the running Junos processes and makes all reasonable attempts
to restart any process that terminates.
Routing Engine Kernel
The Routing Engine kernel provides the underlying infrastructure for all Junos OS
processes. It also provides the link between the routing tables maintained by the routing
protocol process and the forwarding table maintained by the Routing Engine. Additionally,
it coordinates communication with the Packet Forwarding Engine, which primarily involves
synchronizing the Packet Forwarding Engine’s forwarding table with the master forwarding
table maintained by the Routing Engine.
Related
Documentation
M40e Routing Engine Architecture on page 61
•
•
M40e Routing Engine Description on page 26
Tools for Accessing and Configuring the M40e Software
The Junos OS CLI is the primary tool for accessing and controlling the Junos OS. You use
it when accessing the router through the console or a connection to an out-of-band
management network. The CLI includes commands for configuring router hardware, the
Junos OS, and network connectivity.
The Junos OS CLI is a straightforward command interface. You type commands on a
single line and enter the commands by pressing the Enter key. The CLI provides command
help and command completion, as well as Emacs-style keyboard sequences for moving
around on a command line and scrolling through a buffer that contains recently executed
commands. For more information about the CLI, see the
Junos OS System Basics
Configuration Guide
.
Related
Documentation
M40e System Description on page 3
•
•
M40e System Architecture Overview on page 59
57
Copyright © 2010, Juniper Networks, Inc.
Chapter 3: Junos OS Overview
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