Step 1: Display the Status of T3 Interfaces

Action

To display the status of T3 interfaces, use the following JUNOS command-line interface (CLI) operational mode command:

user@host> show interfaces terse t3*

Sample Output

user@host> show interfaces terse t3*

Interface       Admin Link Proto Local                 Remote

t3-1/0/0        down  up                           - administratively disabled

t3-1/0/0.0      up    down inet  1.1.1.1/30

t3-1/0/1        up    down                        

t3-1/0/1.0      up    down inet  2.2.2.2/30 - link layer down

t3-1/0/2        up    up

t3-1/0/2.0      up    up   inet  3.3.3.3/30 - link layer up

t3-1/0/3        up    down 

What It Means

The sample output shows the status of both the physical and logical interfaces. See Table 13 for a description of what the output means.

Table 13: Status of T3 Interfaces

Physical Interface	Logical Interface	Status Description
t3-1/0/0 Admin Down Link Up	t3-1/0/0.0 Admin Up Link Down	This interface is administratively disabled and the physical link is healthy (Link Up), but the logical interface is not established. The logical interface is down because the physical link is disabled (Link Down).
t3-1/0/1 Admin Up Link Down	t3-1/0/1.0 Admin Up Link Down	This interface is not functioning between the local router and the remote router because both the physical and logical links are down (Link Down). The interface is not administratively disabled because both the physical and logical links are up (Admin Up).
t3-1/0/2 Admin Up Link Up	t3-1/0/2.0 Admin Up Link Up	This interface has both the physical and logical links up and running.
fe-1/0/3 Admin Up Link Down		This interface does not have a logical link configured.