Monitoring ATM Interfaces
Purpose
By monitoring ATM interfaces, you begin the process of isolating ATM interface problems when they occur. The following command provides the status of all ATM interfaces on the router. SeeChecklist for Determining ATM Interface Type for information on how to determine the ATM interface type.
Action
To display the status of all ATM interfaces, use the following Junos OS command-line interface (CLI) operational mode command:
Sample Output
The following sample output is for an ATM1 interface:
user@host> show interfaces terse at* Interface Admin Link Proto Local Remote at-2/0/0 up up at-2/2/0.100 up up inet 10.16.5.1/24 at-2/2/0.101 up up inet 10.16.250.253/30 at-2/2/0.200 up up inet 20.20.20.1/30 at-2/2/0.300 up up inet 30.30.30.1/30 at-2/2/0.400 up up inet 40.40.40.1/30 at-2/2/0.32767 up up at-2/0/1 up down at-2/0/1.10 up down inet 10.10.100.1/30
Meaning
The sample output lists only the ATM interfaces and shows the status of both the physical and logical interfaces. See Table 1 for a description of what the output means. You cannot determine from this output whether the interfaces are ATM1 or ATM2 intelligent queuing (IQ). SeeChecklist for Determining ATM Interface Type for information on how to determine the ATM interface type.
Table 1: Status of ATM Interfaces
Physical Interface | Logical Interface | Status Description |
|---|---|---|
at-2/0/0 Admin Up Link Up | at-2/0/0.100 Admin Up Link Up | Both the physical and logical links are up and running on this interface. By default on an ATM interface, if the physical link is up, the logical link is also up. However, for ATM 1 or ATM2 IQ interfaces with an ATM encapsulation and OAM configured for the VC, even if the physical interface is up, the logical link for a VC can be down due to a VC misconfiguration. |
at-2/0/1 Admin Up Link Down | at-2/0/1.10 Admin Up Link Down | The physical link is down on this interface and therefore the logical interface is down also. |
