CDP provides essential information about directly connected network devices in 3-4 fields: the hostname, local interface, hold time before purging from the CDP table, and device type/model. This protocol discovers and shares details on routers, switches, and other network elements for visibility and management.

1. CDPCISCO DISCOVERY PROTOCOL

3. CDP will provide the following information about directly connected neighbors:
• Device ID – hostname of remote router/switch
• Local Interface – interface that remote router/switch is directlyconnected to
• Holdtime – amount of time before remote device information is purged from CDP
table
• Capability – Type of remote device (router, switch, host)
• Platform – Model of remote device

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