Configure a Local Loopback

Action

To configure a local loopback, follow these steps:.

NOTE: For a list of interface types associated with the Channelized OC-12 IQ interface, see Channelized Intelligent Queuing Interface Naming.

1. In configuration mode, go to the following hierarchy level:

[edit]

user@host# edit interfaces t3-fpc/pic/port:channel t3-options

2. Configure the local loopback:

[edit interfaces t3-fpc/pic/port:channel t3-options]

user@host# set loopback local

The following is an example of the name for a T3 channel on a channelized DS-3 interface:

[edit interfaces t3-2/1/0:2 t3-options]

3. Verify the configuration:

user@host# show

For example:

[edit interfaces t3-2/1/0:2 t3-options]

user@host# show   

loopback local;

4. Commit the configuration:

user@host# commit

For example:

[edit interfaces t3-2/1/1:2 t3-options]

user@host# commit 

commit complete

What It Means

When you create a local loopback, you create an internal loop on the interface being tested. A local loopback loops the traffic internally on that PIC. A local loopback tests the interconnection of the PIC but does not test the transmit and receive ports.

NOTE: Remember to delete the loopback statement after completing the test.