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Create a Loop to the Router from Various Points in the Network
Purpose
The transport-layer engineer creates a loop to the router from various points in the network so that you can then perform tests to verify the connection from the router to that loopback in the network.
Action
To verify the connection from the router to a loopback in the network, follow Steps 2 through 8 in Diagnose a Suspected Hardware Problem with a T3 Interface.
Keep in mind that any problems encountered in the test indicate a problem with the connection from the router to the loopback in the network. By performing tests to loopbacks at various points in the network, you can isolate the source of the problem.
