Use Loopback Testing for Fast Ethernet and Gigabit Ethernet Interfaces

This chapter describes the steps you take to isolate Fast Ethernet and Gigabit Ethernet interface problems.

• Checklist for Using Loopback Testing for Fast Ethernet and Gigabit Ethernet Interfaces
• Diagnose a Suspected Hardware Problem with a Fast Ethernet or Gigabit Ethernet Interface
• Create a Loopback
• Verify That the Fast Ethernet or Gigabit Ethernet Interface Is Up
• Configure a Static Address Resolution Protocol Table Entry
• Clear Fast Ethernet or Gigabit Ethernet Interface Statistics
• Ping the Fast Ethernet or Gigabit Ethernet Interface
• Check for Fast Ethernet or Gigabit Ethernet Interface Error Statistics
• Diagnose a Suspected Circuit Problem