What port does CDP use?

CDP does not use a specific default port number.

Unknown

Cisco Discovery Protocol

Q: What is Cisco Discovery Protocol?

Cisco Discovery Protocol (CDP) is a Data Link Layer protocol in the Monitoring & Management category. Cisco proprietary Layer 2 protocol for discovering directly connected Cisco devices. Shares device type, IP address, IOS version, and interface information across Cisco infrastructure.

Data Link Layer — Monitoring & Management

Resumen del protocolo

Nombre completo Cisco Discovery Protocol

Abreviatura CDP

Capa OSI Data Link Layer

Categoría Monitoring & Management

Acerca de CDP

Cisco proprietary Layer 2 protocol for discovering directly connected Cisco devices. Shares device type, IP address, IOS version, and interface information across Cisco infrastructure.

Data Link Layer Monitoring & Management

Protocolos relacionados — Data Link Layer

ARP Address Resolution Protocol CAN-bus Controller Area Network Bus FCoE Fibre Channel over Ethernet FC Fibre Channel LLDP Link Layer Discovery Protocol VXLAN Virtual Extensible LAN WPA3 Wi-Fi Protected Access 3 802.1X IEEE 802.1X Port-Based Authentication