Chapter 4: Router Components Commands: cdp enable Enables Cisco Discovery Protocol on an interface. clear counters Clears the interface counters. show buffers Provides statistics for the buffer pools on the network server. show cdp entry Displays information about a neighbor device listed in the CDP table. show cdp interface Displays information about the interfaces on which CDP is enabled. show cdp neighbors Displays the results of the CDP discovery process. show flash Displays the layout and content of Flash memory. show interfaces Displays statistics for all interfaces configured on the router. show ip route Displays the contents of the IP routing table. show memory Shows statistics about the router's memory, including memory-free pool statistics. show processes Displays information about the active processes. show protocols Displays the configured protocols. This command shows the status of any configured Layer 3 protocol. show running-config Displays the current configuration in RAM. show stacks Monitors the stack use of processes and interrupt routines and displays the reason for the last system reboot. show version Displays the configuration of the system hardware, the software version, the names and sources of configuration files, and the boot images. telnet Logs into a host that supports telnet. trace Determines a path that packets will take when traveling to their destination.