Network Interfaces Naming and Logical Units

Question 1

What is the default naming convention for network interfaces in Junos OS?

Answer 1

The default naming convention for network interfaces is based on the physical slot and port, such as ge-0/0/0 for gigabit Ethernet.

Question 2

How are logical units created for a network interface in Junos OS?

Answer 2

Logical units are created using the set interfaces <interface-name> unit <unit-number> command to define sub-interfaces for an interface.</unit-number></interface-name>

Question 3

What is the purpose of logical units in Junos OS?

Answer 3

Logical units allow a single physical interface to be divided into multiple virtual interfaces, each with its own configuration.

Question 4

What is an example of a logical unit in Junos OS?

Answer 4

An example is ge-0/0/0.0, where ge-0/0/0 is the physical interface and .0 is the logical unit.

Question 5

Can a logical unit have its own IP address in Junos OS?

Answer 5

Yes, each logical unit can be assigned its own IP address and other configuration parameters.

Question 6

How do you configure a logical unit on an interface in Junos OS?

Answer 6

You configure a logical unit by using the set interfaces <interface-name> unit <unit-number> command, followed by specific settings like IP address.</unit-number></interface-name>

Question 7

Can multiple logical units be configured on the same physical interface?

Answer 7

Yes, you can configure multiple logical units on the same physical interface, each with different settings.

Question 8

What is the maximum number of logical units that can be created on a physical interface in Junos OS?

Answer 8

The maximum number of logical units depends on the interface type and device model, but generally, up to 64 logical units can be created on a physical interface.

Question 9

How do you remove a logical unit from an interface in Junos OS?

Answer 9

You remove a logical unit by using the delete interfaces <interface-name> unit <unit-number> command.</unit-number></interface-name>

Question 10

What happens to the physical interface if all logical units are deleted in Junos OS?

Answer 10

If all logical units are deleted, the physical interface remains, but it will no longer have any assigned sub-interfaces or IP configuration.