Use Loopback Testing for Channelized OC12 Interfaces

This chapter describes using loopback testing to isolate Channelized OC12 and Channelized OC12 IQ interface problems. The procedure for both types of Channelized OC12 interfaces is the same. The naming convention for the Channelized OC12 IQ interface varies depending on the type of interface. For a list of interface types associated with the Channelized OC12 IQ interface, see .

• Checklist for Using Loopback Testing for Channelized OC12 and Channelized OC12 IQ Interfaces
• Diagnose a Suspected Hardware Problem with a Channelized OC12 or Channelized OC12 IQ 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