After issuing the show interfaces terse command, you notice that the status of one interface is "up down". What does this indicate?
Click on the arrows to vote for the correct answer
A. B. C. D.C
The the administratively status is displayed in column 1, and the link status is displayed in column 2.
Example:
user@host> show interfaces terse t1*
Interface Admin Link Proto Local Remote t1-1/0/0 down up --- administratively disabled t1-1/0/0.0 up down inet 1.1.1.1/30 t1-1/0/1 up down --- physical layer down
The "show interfaces terse" command in Junos OS displays a brief summary of the interface status. When an interface is listed as "up down," it means that the interface is administratively up, but the link status is down. This typically indicates that there is a Layer 1 issue, such as a cable or hardware problem, preventing the interface from establishing a physical link with its neighbor device.
Here are the explanations of the other answer options:
A. Layer 1 on the interface is up but Layer 2 is down - This scenario would typically be indicated by the status "up" without the "down" qualifier. If Layer 2 was down, it would likely be due to a configuration issue or protocol problem.
B. Layer 2 on the interface is up but Layer 3 has not been configured - This scenario would also typically be indicated by the status "up" without the "down" qualifier. If Layer 3 was not configured, the interface would not be able to communicate with other networks, but the physical link would still be established.
C. The interface is administratively up but the link status is down - This is the correct answer option.
D. The interface is up but has been administratively turned off - This scenario would be indicated by the status "down" without the "up" qualifier. If the interface was administratively turned off, it would not be able to establish a link with its neighbor device.