How can one verify that CEF is enabled on interface GE 0/0?

To verify that Cisco Express Forwarding (CEF) is enabled on a specific interface, such as GE 0/0, the appropriate command provides detailed information about that interface's configuration regarding IP functionality. Using the command "show ip int GE 0/0" will display the status and configuration of the IP interface, including whether CEF is enabled.

This command reveals various statistics and settings, such as the IP address assigned, operational status, and importantly, whether CEF is being used to make forwarding decisions on that interface. In this case, the output would typically indicate whether CEF has been activated, which is crucial for optimizing packet forwarding in high-speed networks.

Other commands listed do not specifically focus on the status of CEF on the interface level. For example, "check interface GE 0/0 status" is a vague reference and not a recognized command in Cisco IOS, making it less useful for this purpose. The command "show cef status" would provide information about CEF globally on the router but wouldn't narrow down to the specifics of any single interface. Finally, "show ip route" is used to display the routing table and would not indicate whether CEF is enabled on a specific interface. Thus, utilizing "show ip int