C H A P T E; Configuring Cdp; Information About Cdp; Cdp Overview - Cisco MDS 9000 Series Configuration Manual

Configuring CDP

This chapter describes how to configure the Cisco Discovery Protocol (CDP) on Cisco MDS 9000 Family
switches.
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Information About CDP

This section includes information about CDP.

CDP Overview

The Cisco Discovery Protocol (CDP) is an advertisement protocol used by Cisco devices to advertise itself
to other Cisco devices in the same network. CDP runs on the data link layer and is independent of Layer 3
protocols. Cisco devices that receive the CDP packets cache the information to make it accessible through
the CLI and SNMP.
The Cisco NX-OS software supports CDP on the management Ethernet (mgmt0) interface on the supervisor
module and the Gigabit Ethernet interfaces on the IP Storage Services (IPS) and 14/2-port Multiprotocol
Services (MPS-14/2) modules. The CDP daemon is restartable and switchable. The running and startup
configurations are available across restarts and switchovers.
CDP version 1 (v1) and version 2 (v2) are supported in Cisco MDS 9000 Family switches. CDP packets with
any other version number are silently discarded when received.
When the interface link is established, CDP is enabled by default and three CDP packets are sent at 1-second
intervals. Following this action, the CDP frames are sent at the globally configured refresh interval.
OL-29291-02
Information About CDP, page 125
Configuring CDP, page 126
Verifying the CDP Configuration, page 128
Clearing CDP Counters and Tables, page 129
CDP Example Configuration, page 129
Default Settings for CDP, page 129
C H A P T E R
Cisco MDS 9000 Family NX-OS Fundamentals Configuration Guide
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