In this first section we talk about the overview and we give you some prerequisites some definitions and terms.
Overview about product line.Basic Understanding about JUNOS CLI (Command line interface):
These are similarities in JUNOS and Cisco system IOS and if u have the experience with Cisco products than you have some level of comfort there.
The Modular structure of JUNOS does make it easier to manage a router and take next level of reliability and stability.
- JUNOS: Name of the OS (Operating System) for junipers routers.
- CLI: Command Line Interface which helps you how to manage the router.
- PIC: Physical Interface card it is an interface use to connect the network to the fast T , ATM
- Flexible pick concentrator is a card like a carrier card for the physical interfaces.
- ROE Routing Engine which is a processor which is use for the OS runs.
- Packet folding Engine is the manage the traffic flow to the routers in does all the packet processors.
Objectives:
We should have some knowledge and experience for managing routers understand IP, IP Addressing , subnetting and know some basic protocols like BGP , IGRP , OSPF , RIP etc.
For access the router we connect the router console port from where we can manage and implement all commands of routers.
How to connect to the juniper network router and overview of the CLI of the basic functions and basic commands on the CLI?
First Step
Connect to the router. There are 3 ways
- Console port
- Auxiliary or Modem port
- Out of band through the Ethernet port.
This port is designated FXP 0 under router out of band Ethernet port because we can pass thru traffic through this port. With the console port we use console cable use to connect standard PC or Unix Box from serial port COM1 For Example connected to the router then you use the communication application such as HyperTerminal. And
Setting is
Standard 9681.
Overview of the CLI Command Line Interface
Now you access thru console port for the network access such as SSH Telnet . We recommend SSH for security reason over telnet. CLI is simple text base interface for managing router there is various commands that are designed for monitoring , debugging , troubleshooting for the Hardware , Software and network connectivity .
There are 2 modes for operation in JUNOS.
- Operational mode
For managing your router , managing your HW looking SW examples of operational modes commands are show for example show the version of software you are running .
- Configuration mode
Configuration utility modifying files configuration of router.
Some of the Examples of commands:
First you logon on your account on juniper. You will see the prompt there and type the “?” there. It will show you all the commands you execute from that prompt.
Command :
- Juniper > Show ?
It will show you all options in the hierarchy within show commands.
- Juniper > Show system
It will show you all commands related to system
- Juniper > Show ver
- Juniper > Show version ----- just press ( Tab )
- Juniper > Show route
Command history:
Up key and down key
More list of CLI Commands
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