Use Loopback Testing for Multichannel DS3 Interfaces

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

• Checklist for Using Loopback Testing for Multichannel DS3 Interfaces
• Diagnose a Suspected Hardware Problem with a Multichannel 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
• Create a Loop from the Router to the Network
• Create a Loop to the Router from Various Points in the Network