CCNA 5.6 Cisco Discovery Protocol (CDP)

• CDP is a proprietary protocol designed to help administrators collect information about both locally attached and remote devices
• Show cdp command gives user info on CDP timer & holdtime
• CDP timer is how often CDP packets are transmitted out all active interfaces
• CDP holdtime is the amount of time that the device will hold packets received from neighbor devices
• show cdp neighbors command deliver info (device ID, local interface, holdtime, capability, platform & port ID) about locally connected devices
• show cdp neighbors detail command deliver extra info on IP address & IOS version
• show cdp traffic command displays info about interface traffic (amount of CDP packets sent & received)
• show cdp interface command display info about CDP status on router interfaces or switch ports