Step 1: Create a Loop from the Router to the Network

Purpose

Creating a loop from the router to the network allows the transport-layer engineer to test the router from various points in the network. This helps the engineer isolate where the problem might be located.

Action

To create a loop from the router to the network, follow these steps:

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

[edit]

user@host# edit interfaces interface-name sonet-options

2. Configure the remote loopback:

[edit interfaces interface-name sonet-options]

user@host# set loopback remote

3. Verify the configuration:

user@host# show

For example:

[edit interfaces so-1/0/0 sonet-options]

user@host# show

loopback remote;

4. Commit the change:

user@host# commit 

For example:

[edit interfaces so-1/0/0 sonet-options]

user@host# commit 

commit complete

What It Means

This command loops any traffic from the network back into the network.