Juniper Router Configuration: Part-1

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1. Shell Mode:


login: root
password:
root@%


2. Operational Mode:

To Login

root@% cli
root>


3. Configuration Mode:

To Set Hostname and password

root> configure/edit
root# set system host-name Core
root# set system root-authentication plain-text-password
New password:
root# commit
root@Core#
root@Core> request system reboot



To exit from the current mode

root#exit



To check the interfaces

root@Core> show interfaces terse


To show all the available interfaces on a Juniper Router you are using, use the following command.

root> show interfaces


To view the status of a specific interface information on Juniper Router running on JunOS, use the following command syntax.


root> show interfaces em0



To show the Configuration

To check the current configuration settings on a Juniper Router, execute the following command at the Operational CLI mode.

root> show configuration

Viewing configurations commands starting with the specific group of commands use the following command syntax. 

For example, to show all the command of Operation CLI mode starting with “set” prefix, execute the following command.

root> show configuration | display set



To configure the IP address

root@Core# set interfaces em0 unit 0 family inet address 172.16.20.1/28



To configure loopback address

root@Core# set interfaces lo0 unit 0 family inet address 1.1.1.1/32



To set Static route

root@Core# set routing-options static route 0.0.0.0/0 next-hop 172.16.20.1



To View Routing Table (Routes)

The following command is used to view the all the routes on a Juniper Router running on the JunOS.

root> show route



To show MAC address or ARP

root>show arp | match "16.23.43.75" 



To Clear ARP

root>clear arp interface ae16.83



To show System Service

root@JuniperSW> show system services



NAT

root# set policy-options prefix-list NAT_list 10.10.10.0/24
root# commit

root# set services nat pool NAT_Pool address 10.10.10.0/24        
root# commit

root# set services nat pool NAT_Pool address-range low 10.10.10.1 high 10.10.10.100 

root@CORE# set services nat rule NAT_rule match-direction input

root# set services nat rule NAT_rule term NAT_term from source-prefix-list NAT_list

root# set services nat rule NAT_rule term NAT_term then translated translation-type basic-nat44 

root# commit



Juniper Nat

Interface-based source NAT

set security nat source rule-set 1 from zone trust

set security nat source rule-set 1 to zone untrust

set security nat source rule-set 1 rule 1A match source-address 0.0.0.0/0

set security nat source rule-set 1 rule 1A then source-nat interface

commit


Pool-based source NAT

set security nat source pool src_nat_pool_napt address 100.100.110.20/32 to 100.100.100.29/32

set security nat source rule-set src_nat_napt from zone trust

set security nat source rule-set src_nat_napt to zone untrust

set security nat source rule-set src_nat_napt rule napt_1 match source-address 192.168.1.0/24

set security nat source rule-set src_nat_napt rule napt_1 then  source-nat pool src_nat_pool_napt

set security nat proxy-arp interface ge-0/0/0.0 address 100.100.100.20/32 to 100.100.100.29/32

set security nat source pool src_nat_pool_napt address 100.100.110.20/32 to 100.100.100.29/32

set security nat source rule-set src_nat_napt rule snat_1 match source-address 192.168.10.5/32

set security nat source rule-set src_nat_napt rule snat_1 match source-address 192.168.11.5/32

set security nat source rule-set src_nat_napt rule snat_1 match destination-address 0.0.0.0/0

set security nat source rule-set src_nat_napt rule snat_1 then source-nat pool snat_pool_1

set security nat proxy-arp interface ge-0/0/0.0 address 100.100.100.20/32 to 100.100.100.29/32








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