Cisco Systems N5KC5596TFA manual Disabling Link Negotiation, Configuring the CDP Characteristics

Configuring Layer 2 Interfaces

Disabling Link Negotiation

Disabling Link Negotiation

You can disable link negotiation using the no negotiate auto command. By default, auto-negotiation is enabled on 1-Gigabit ports and disabled on 10-Gigabit ports.

This command is equivalent to the Cisco IOS speed non-negotiatecommand.

Note We do not recommend that you enable auto negotiation on 10-Gigabit ports. Enabling auto-negotiation on 10-Gigabit ports brings the link down. By default, link negotiation is disabled on 10-Gigabit ports.

Procedure

	Command or Action	Purpose
Step 1	switch# configure terminal	Enters configuration mode.
Step 2	switch(config)# interface ethernet	Selects the interface and enters interface mode.
	slot/port
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.
		Note	This command is not applicable for 10GBase-T
			ports. It should not be used on 10GBase-T ports.

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.

	Cisco Nexus 5000 Series NX-OS Interfaces Configuration Guide, Release 5.2(1)N1(1)
14	78-26881-OL