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M160 Internet Router Hardware Guide
Tools for Accessing and Configuring the Software
The JUNOS CLI is the primary tool for accessing and controlling the JUNOS Internet
software. 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 Internet software, and network connectivity.
The JUNOS 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 System Basics Configuration Guide.
Tools for Monitoring the Software
In addition to commands for configuring router hardware and software, the CLI
includes commands for monitoring and troubleshooting hardware, software, routing
protocols, and network connectivity. CLI commands display information from
routing tables, information specific to routing protocols, and information about
network connectivity derived from the
You can also use the JUNOS Internet software implementation of SNMP to monitor
routers. The SNMP software consists of an SNMP master agent and a MIB II agent.
It provides full support for MIB II SNMP version 1 traps and version 2 notifications,
SNMP version 1
information about SNMP, see the JUNOS Network Management Configuration Guide.
The software also supports tracing and logging operations, which you can use
to track normal router operations, error conditions, and the packets that the
router generates or forwards. Logging operations use a syslog-like mechanism to
record systemwide, high-level events such as interfaces going up or down and
user logins on the router. Tracing operations record more detailed information
about the operation of routing protocols, such as the various types of routing
protocol packets sent and received, and routing policy actions.
Software Upgrades
The router is delivered with the JUNOS Internet software preinstalled. To upgrade
the software, you use CLI commands to copy a set of software images over the
network to memory storage on the Routing Engine. The JUNOS Internet software
set consists of several images provided in individual packages or as a bundle. You
normally upgrade all packages simultaneously. For information about installing and
upgrading JUNOS software, see the JUNOS System Basics Configuration Guide.
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Software Upgrades
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Troubleshooting
