Use Loopback Testing for ATM Interfaces

This chapter describes the steps for using loopback testing to isolate Asynchronous Transfer Mode (ATM) interface problems. The steps for loopback testing apply to both ATM1 and ATM2 intelligent queuing (IQ) interfaces.

• Checklist for Using Loopback Testing for ATM Interfaces
• Diagnose a Suspected Hardware Problem with an ATM1 or ATM2 IQ Interface
• Create a Loopback
• Set Clocking to Internal
• Verify That the ATM Interface Is Up
• Clear ATM Interface Statistics
• Ping the ATM Interface
• Check for ATM Interface Error Statistics
• Diagnose a Suspected Circuit Problem