Use Loopback Testing for SONET Interfaces

This chapter describes the steps for using loopback testing to isolate SONET interface problems.

• Checklist for Using Loopback Testing for SONET Interfaces
• Diagnose a Suspected Hardware Problem with a SONET Interface
• Create a Loopback
• Set Clocking to Internal
• Verify That the SONET Interface Is Up
• Clear SONET Interface Statistics
• Check That the Received and Transmitted Path Trace Are the Same
• Force the Link Layer to Stay Up
• Verify the Status of the Logical Interface
• Ping the SONET Interface
• Check for SONET Interface Error Statistics
• Diagnose a Suspected Circuit Problem