Cisco Systems N3KC3048TP1GE Configuring the CDP Characteristics, Advertise v1, Holdtime seconds

Configuring Ethernet Interfaces

Configuring the CDP Characteristics

	Command or Action	Purpose
Step 3	switch(config-if)# no negotiate auto	Disables link negotiation on the selected Ethernet
		interface (1-Gigabit port).
Step 4	switch(config-if)# negotiate auto	(Optional)
		Enables link negotiation on the selected Ethernet
		interface. The default for 1-Gigabit ports is enabled.

This example shows how to disable auto negotiation on a specified Ethernet interface (1-Gigabit port):

switch# configure terminal switch(config)# interface ethernet 1/1 switch(config-if)#no negotiate auto switch(config-if)#

This example shows how to enable auto negotiation on a specified Ethernet interface (1-Gigabit port):

switch# configure terminal switch(config)# interface ethernet 1/5 switch(config-if)#negotiate auto switch(config-if)#

Configuring the CDP Characteristics

You can configure the frequency of Cisco Discovery Protocol (CDP) updates, the amount of time to hold the information before discarding it, and whether or not to send Version-2 advertisements.

To configure CDP characteristics for an interface, perform this task:

Procedure

	Command or Action	Purpose
Step 1	switch# configure terminal	Enters configuration mode.
Step 2	switch(config)# [no] cdp	(Optional)
	advertise {v1 v2 }	Configures the version to use to send CDP advertisements.
		Version-2 is the default state.
		Use the no form of the command to return to its default
		setting.
Step 3	switch(config)# [no] cdp format	(Optional)
	device-id {mac-address	Configures the format of the CDP device ID. The default is
	serial-number system-name}	the system name, which can be expressed as a fully qualified
		domain name.
		Use the no form of the command to return to its default
		setting.
Step 4	switch(config)# [no] cdp	(Optional)
	holdtime seconds	Specifies the amount of time a receiving device should hold
		the information sent by your device before discarding it. The
		range is 10 to 255 seconds; the default is 180 seconds.

	Cisco Nexus 3000 NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)U3(1)
16	OL-26590-01