Use Loopback Testing For Channelized DS3 Interfaces

This chapter describes using loopback testing to isolate Channelized DS3 interface problems.

• Checklist for Using Loopback Testing for Channelized DS3 Interfaces
• Diagnose a Suspected Hardware Problem with a Channelized DS3 Interface
• Create a Loopback
• Verify That the Interface Is Up
• Clear Interface Statistics
• Force the Link Layer to Stay Up
• Verify the Status of the Logical Interface
• Ping the Channelized Interface
• Check for Interface Error Statistics
• Diagnose a Suspected Circuit Problem