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

プロトコル概要

正式名称 Cisco Discovery Protocol

略称 CDP

OSIレイヤー Data Link Layer

カテゴリ Monitoring & Management

概要 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

Cisco Discovery Protocol

プロトコル概要

概要 CDP

関連プロトコル — Data Link Layer