Cisco Catalyst 3550 Series User Manual

22-4
Catalyst 3550 Multilayer Switch Software Configuration Guide
78-11194-09
Chapter 22 Configuring CDP
Configuring CDP
This example shows how to enable CDP if it has been disabled.
Switch# configure terminal
Switch(config)# cdp run
Switch(config)# end
Disabling and Enabling CDP on an Interface
CDP is enabled by default on all supported interfaces to send and receive CDP information.
Beginning in privileged EXEC mode, follow these steps to disable CDP on an interface:
Beginning in privileged EXEC mode, follow these steps to enable CDP on an interface when it has been
disabled:
This example shows how to enable CDP on an interface when it has been disabled.
Switch# configure terminal
Switch(config)# interface gigabitethernet0/5
Switch(config-if)# cdp enable
Switch(config-if)# end
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Enter interface configuration mode, and enter the interface on which
you are disabling CDP.
Step 3
no cdp enable Disable CDP on an interface.
Step 4
end Return to privileged EXEC mode.
Step 5
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Enter interface configuration mode, and enter the interface on which
you are enabling CDP.
Step 3
cdp enable Enable CDP on an interface after disabling it.
Step 4
end Return to privileged EXEC mode.
Step 5
copy running-config startup-config (Optional) Save your entries in the configuration file.

Cisco Catalyst 3550 Series Specifications

General

Form Factor	Rack-mountable
Manageable	Yes
RAM	64 MB
Device Type	Switch
MAC Address Table Size	12000 entries
Routing Protocol	RIP
Features	VLAN support
Power Supply	AC 120/230 V (50/60 Hz)
Ports	24 or 48 x 10/100Base-TX, 1 x GBIC, 2 x 10/100/1000Base-T
Operating Temperature	32 to 113°F (0 to 45°C)