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Juniper Configuring an IPv6 Address on an Interface
 
You want to configure an interface to work on an IPv6 network.
The IPv6 address configuration is very similar to that for IPv4:
 
# set interfaces ge-0/0/3 unit 0 family inet6 address abc0:2:3:1::2/64

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Use rollback to restore a previous configuration:

# rollback 0
[Resets the candidate configuration to the currently active configuration]

# rollback 1
[Loads the previously active configuration]  

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Gathering JUNOS Software Version Information
 
You want to determine which software version is running on the router.
The following command shows the software version and lists all the software components that are running on the router:
 
source@router1> show version
Hostname: router1

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Juniper Loading a Factory-Default Configuration

Use load factory-default to load a system’s factory-default configuration 

# load factory-default 
[It will be load as a Factory Default as like a new device. Previous all configuration will be delete]

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Setup Juniper Root Password

Root password is mandotory. Without root password you can non commit configuration

# set system root-authentication plain-text-password    [Enter]
New password:

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Displaying the Commands to Recreate a Configuration Problem
 
You have a copy of a JUNOS router configuration or you need to duplicate a router configuration on another router and you want to know the commands to use to create the configuration.
Use the following command to list the commands for creating a configuration:

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Juniper Backing Up the Router's Configuration
 
You want to back up the router's configuration to a remote server.
You can use the following command to copy the active configuration file to a server:
 
source@router1> file copy /config/juniper.conf.gz  server1:/homes/aviva/tmp 

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Commit the Configuration

To activate any configuration you must type commit.
Otherwise the configuration will be not execute.
Below describe the type of commit operation: 

Use commit to activate configuration changes:

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Juniper, Who Is Logged In to the Router
 
You are logged in to the router and you want to see who else is logged in.
Use the show system users command to see who is logged in to the router:
 
source@router1> show system users

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Juniper Enabling Remote Access

Enable FTP Service
# set system services ftp

Enable Telent Service
# set system services telnet

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Configure IP Address in Juniper

#  set interfaces ge-0/0/1 unit 0 family inet address 192.168.100.1/30

Looking at the levels of the command more closely:

  • ge-0/0/1 is the name of the Gigabit Ethernet physical interface.

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Comparing Configuration with roolback to File Differences

Compare candidate and active configurations:
# show | compare

Compare active and historical configurations:

show | compare roolback 2

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Juniper Package Naming Convention

Software packages have standard names

“package-m.nZnumber.tgz”
• m.n is the major version number

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Juniper Standard Interfaces

Physical interfaces have standard names Based on

  • Interface port type.
  • FPC slot number (FPC- Flexible PIC Concentrator) 

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