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To enable Power over Ethernet (PoE), use the feature poe command. To disable PoE, use the no form of this command.
feature poe
no feature poe
This command has no keywords or arguments.
Disabled
Global configuration mode
Release |
Modification |
---|---|
5.0(3)N2(1) |
This command was introduced. |
This example shows how to enable PoE on the switch:
switch(config)# feature poe
Command |
Description |
---|---|
power inline |
Configures the power usage for interfaces. |
show feature |
Displays the status of features enabled or disabled on the switch. |
To enable the Cisco-proprietary Unidirectional Link Detection (UDLD) protocol, which allows ports that are connected through fiber optics or copper Ethernet cables to monitor the physical configuration of the cables and detect when a unidirectional link exists, use the feature udld command. To disable UDLD on the switch, use the no form of this command.
feature udld
no feature udld
This command has no arguments or keywords.
UDLD is disabled.
Global configuration mode
Release |
Modification |
---|---|
6.0(2)N1(1) |
This command was introduced. |
This example shows how to enable UDLD on the switch:
switch(config)# feature udld
Command |
Description |
---|---|
show udld |
Displays the administrative and operational UDLD status. |
show feature |
Displays whether or not UDLD is enabled on the switch. |
To select the fabric mode, use the fabric-mode command.
fabric-mode { 10g | 40g }
10g-optimized |
Sets the fabric mode to 10G. |
40g-optimized |
Sets the fabric mode to 40G. |
40G
Global configuration mode
Release |
Modification |
---|---|
6.0(2)N1(1) |
This command was introduced. |
None
Please provide guidelines.
This example shows how to set the fabric mode to 10G:
switch# configure terminal switch(config)# fabric-mode 10g
This example shows how to set the fabric mode to 40G:
switch# configure terminal switch(config)# fabric-mode 40g
Command |
Description |
---|---|
|
|
To enable the Adapter Fabric Extender (Adapter-FEX), use the feature adapter-fex command. To disable Adapter-FEX, use the no form of this command.
feature adapter-fex
no feature adapter-fex
This command has no arguments or keywords.
Disabled
Global configuration mode
Release |
Modification |
---|---|
5.1(3)N1(1) |
This command was introduced. |
Before you disable this feature on the switch, do the following:
If you attempt to disable the Adapter-FEX feature with virtual Ethernet interface or port profile configurations enabled, the switch returns an error message.
Before you use a virtual Ethernet interface, you must enable Cisco Virtual Machine Fabric Extender (VM-FEX) on the switch by using the feature vmfex command.
This example shows how to enable Adapter-FEX on the switch:
switch# configure terminal switch(config)# feature adapter-fex Virtualization Plugin license checked out successfully Virtualization Plugin extracted successfully All Virtualization processes enabled successfully switch(config)#
This example shows how to disable Adapter-FEX on the switch:
switch# configure terminal switch(config)# no feature adapter-fex Disabled feature adapter-fex successfully. You should save the configuration and Reload. switch(config)#
This example shows the error message that appears when you attempt to disable Adapter-FEX on a switch with virtual Ethernet interface configurations enabled:
switch# configure terminal switch(config)# no feature adapter-fex Disabling of NIV failed.veth and vntag configs found Shutdown all veths and Remove them. Change ports with 'switchport mode vntag' to 'switchport mode access'. switch(config)#
Command |
Description |
---|---|
interface vethernet |
Configures a virtual Ethernet interface. |
port-profile |
Configures a port profile. |
show feature |
Displays whether or not Adapter-FEX is enabled on the switch. |
switchport mode |
Configures the interface as a nontrunking nontagged single-VLAN Ethernet interface. |
To enable Link Layer Discovery Protocol (LLDP), use the feature lldp command. The (LLDP), which is a neighbor discovery protocol that is used for network devices to advertise information about themselves to other devices on the network, is enabled on the switch by default.
feature lldp
no feature lldp
This command has no arguments or keywords.
Enabled
Release |
Modification |
---|---|
6.0(2)N1(1) |
This command was introduced. |
You can enable or disable the LLDP feature, using the feature lldp command on a Cisco Nexus device.
The Cisco Discovery Protocol (CDP) is a device discovery protocol that runs over Layer 2 (the data link layer) on all Cisco-manufactured devices (routers, bridges, access servers, and switches). CDP allows network management applications to automatically discover and learn about other Cisco devices connected to the network.
To support non-Cisco devices and to allow for interoperability between other devices, the switch supports the Link Layer Discovery Protocol (LLDP). LLDP is a neighbor discovery protocol that is used for network devices to advertise information about themselves to other devices on the network. This protocol runs over the data-link layer, which allows two systems running different network layer protocols to learn about each other.
This example shows how to enable the LLDP feature on the switch:
switch(config)# feature lldp
This example shows how to disable LLDP on the switch:
switch(config)# no feature lldp
In the following example, when the feature lldp command is enabled, it is displayed in the running configuration of a switch:
switch# show running-config !Command: show running-config !Time: Wed Jan 29 12:36:03 2013 version 6.0(2)N1(1) feature telnet feature lldp username admin password 5 $1$d8lkfqC8$4VfRuOoZTKvCtTq8VAKbq/ role network-admin no password strength-check ip domain-lookup hostname switch class-map type qos class-fcoe class-map type qos match-all c1 match cos 1 <--Output truncated--> switch#
Command |
Description |
---|---|
lldp |
Configures the global LLDP options on the switch. |
lldp (Interface) |
Configures the LLDP feature on an interface. |
show feature |
Displays that LLDP is enabled on the switch. |