Step 1: Display the Status of SONET Interfaces

Action

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

user@host> show interfaces terse so*

Sample Output

user@host> show interfaces terse so*

Interface       Admin Link Proto Local                 Remote

so-1/0/0        up    up 

so-1/0/0.0      up    up   inet  192.168.8.192     --> 192.168.2.250 

                           iso

[...Output truncated...]

so-1/1/1        down  up 

so-1/1/1.0      up    down inet  192.168.8.113/30 

                           iso 

                           mpls

[...Output truncated]

so-3/0/1        up    up 

so-3/0/1.0      up    down inet  192.168.2.125/30

[...Output truncated...]

so-5/3/0        up    down 

so-5/3/0.0      up    down inet  10.39.1.1/16

[...Output truncated...]

What It Means

The sample output lists only the SONET interfaces. It shows the status of both the physical and logical interfaces.

For a description of what the output means, see Table 27.

Table 27: Status of SONET Interfaces

Physical Interface	Logical Interface	Status Description
so-1/0/0 Admin Up Link Up	so-1/0/0.0 Admin Up Link Up	This interface has both the physical and logical links up and running.
so-1/1/1 Admin Down Link Up	s0-1/1/1.0 Admin Up Link Down	This interface is administratively disabled. The physical link is healthy (Link Up), but the logical link is not established end to end (Link Down).
so-3/0/1 Admin Up Link Up	so-3/0/1.0 Admin Up Link Down	This interface is administratively enabled and the physical link is healthy (Link Up), but the logical interface is not established end to end (Link Down).
so-5/3/0 Admin Up Link Down	so-5/3/0.0 Admin Up Link Down	This interface has the physical link down and the logical interface is down also.