Configuring Junos OS: Basic

Question 1

How do you configure an interface as the default gateway in Junos OS?

Answer 1

You configure the default gateway using the command: set routing-options static route 0.0.0.0/0 next-hop <gateway-ip>.</gateway-ip>

Question 2

What is the first step in configuring a Junos OS device?

Answer 2

The first step is to access the device, either via console, SSH, or another remote method, and enter configuration mode by typing configure or edit.

Question 3

How do you configure an IP address on an interface in Junos OS?

Answer 3

To configure an IP address, use the command: set interfaces <interface-name> unit <unit-number> family inet address <IP-address>.</IP-address></unit-number></interface-name>

Question 4

What is the purpose of the “commit” command in Junos OS?

Answer 4

The “commit” command saves the changes made in the configuration and applies them to the device.

Question 5

How do you view the current configuration in Junos OS?

Answer 5

You can view the current configuration by using the command show configuration.

Question 6

How do you add a static route to a Junos device?

Answer 6

To add a static route, use the command: set routing-options static route <destination> next-hop <next-hop>.</next-hop></destination>

Question 7

What command is used to delete a configuration in Junos OS?

Answer 7

Use the delete command to remove a specific configuration, e.g., “delete interfaces <interface-name>".</interface-name>

Question 8

How do you configure a hostname in Junos OS?

Answer 8

To configure a hostname, use the command: set system host-name <hostname>.</hostname>

Question 9

What is the purpose of the rollback command in Junos OS?

Answer 9

The rollback command reverts the configuration to a previous state, allowing recovery from unwanted changes.

Question 10

How do you save a configuration in Junos OS?

Answer 10

The configuration is saved and applied using the command commit.