Some most frequently used Juniper JUNOS commands

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JUNOS is the operating system used on Juniper Networks routers, switches, and other networking devices. Like other network devices, JUNOS devices can be managed through a command-line interface (CLI) using various show commands. Here is an overview of some commonly used JUNOS show commands:

show interfaces: This command displays the status and statistics of all interfaces on the device. For example, show interfaces ge-0/0/0 will display the status and statistics of the interface ge-0/0/0.

show configuration: This command displays the current configuration of the device. For example, show configuration interfaces | display set will display the current configuration of all interfaces in set format.

show route: This command displays the routing table of the device. For example, show route 10.0.0.0/24 will display the routing information for the 10.0.0.0/24 network.

show arp: This command displays the ARP table of the device. For example, show arp | match 192.168.1.1 will display the ARP information for the device with IP address 192.168.1.1.

show vlan: This command displays the VLAN configuration of the device. For example, show vlans will display all configured VLANs on the device.

show system uptime: This command displays the current uptime of the device. For example, show system uptime will display the current device uptime.

show chassis hardware: This command displays the hardware inventory of the device. For example, show chassis hardware detail will display the detailed hardware inventory of the device.

show bgp summary: This command displays the summary information for the Border Gateway Protocol (BGP) configuration. For example, show bgp summary will display the BGP status and summary information for the device.

These are just a few examples of the many show commands available in JUNOS devices. Consult the device documentation for a full list of available commands and their usage.

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Juniper JUNOS Static route configuration

To configure a static route on a Juniper device running JUNOS, follow these steps:

1. Enter configuration mode by typing configure in the CLI.
2. Specify the destination network and subnet mask using CIDR notation. For example, to add a static route for the network 10.0.0.0/24, type routing-options static route 10.0.0.0/24.
3. Specify the next-hop IP address or interface for the static route. For example, to specify a next-hop IP address of 192.168.1.1, type next-hop 192.168.1.1. If you want to specify an outgoing interface instead of a next-hop IP address, type next-hop-interface <interface-name>.
4. Optionally, you can specify additional parameters such as administrative distance or metric. For example, to set a metric of 5 for the static route, type metric 5.
5. To commit your changes, type commit.
Here's an example configuration for a static route with a next-hop IP address of 192.168.1.100:

Code Select Expand

configure
set routing-options static route 10.0.0.0/24 next-hop 192.168.1.100
commit

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To configure a default route on a Juniper device running JUNOS, you can use the following steps:

1. Enter configuration mode by typing configure in the CLI.
2. Specify the default route using the default keyword. For example, type routing-options static route 0.0.0.0/0.
3. Specify the next-hop IP address or interface for the default route. For example, to specify a next-hop IP address of 192.168.1.1, type next-hop 192.168.1.1. If you want to specify an outgoing interface instead of a next-hop IP address, type next-hop-interface <interface-name>.
4. Optionally, you can specify additional parameters such as administrative distance or metric. For example, to set a metric of 5 for the default route, type metric 5.
5. To commit your changes, type commit.
Here's an example configuration for a default route with a next-hop IP address of 192.168.1.1:

Code Select Expand

configure
set routing-options static route 0.0.0.0/0 next-hop 192.168.1.1
commit