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default shutdown (virtual Ethernet interface)
D Commands
This chapter describes the Cisco NX-OS Ethernet and virtual Ethernet commands that begin with D.
default shutdown (virtual Ethernet interface)
To enable default commands on a virtual Ethernet interface, use the default shutdown command.
default shutdown
Syntax Description
This command has no arguments or keywords.
Command Default
No description is added.
Command Modes
Virtual Ethernet interface configuration
Command History
Usage Guidelines
This command does not require a license.
Examples
This example shows how to enable a virtual Ethernet interface:
switch# configure terminalswitch(config)# interface vethernet 1switch(config-if)# default shutdownswitch(config-if)#Related Commands
show interface vethernet
Displays the virtual Ethernet interface configuration information.
show running-config
Displays the contents of the currently running configuration file.
delay (interface)
To set a delay value for an interface, use the delay command. To restore the default delay value, use the no form of this command.
delay tens-of-microseconds
no delay
Syntax Description
Command Default
10 microseconds
Command Modes
Interface configuration mode
Subinterface configuration modeCommand History
4.0(0)N1(1a)
This command was introduced.
5.0(3)N1(1)
Support for Layer 3 interfaces was added.
Examples
This example shows how to set a delay of 30,000 microseconds on an interface:
switch(config)# interface ethernet 1/1switch(config-if)# delay 30000switch(config-if)#This example shows how to set a delay of 1000 microseconds on a subinterface:
switch(config)# interface ethernet 1/1.1switch(config-subif)# delay 1000switch(config-subif)#Related Commands
interface ethernet (Layer 3)
Configures an Ethernet routed interface.
show interface
Displays the interface configuration information.
description (interface)
To add a description to an interface configuration, use the description command. To remove the description, use the no form of this command.
description description
no description
Syntax Description
description
String description of the interface configuration. This string is limited to 80 characters.
Command Default
No description is added.
Command Modes
Interface configuration mode
Subinterface configuration mode
Virtual Ethernet interface configurationCommand History
4.0(0)N1(1a)
This command was introduced.
5.0(3)N1(1)
Support for Layer 3 interfaces was added.
5.1(3)N1(1)
Support for virtual Ethernet interface was added.
Usage Guidelines
The description command is meant to provide a reminder in the configuration to describe what certain interfaces are used for. The description appears in the output of the following commands such as show interface and show running-config.
You can use this command on the following interfaces:
•
Ethernet interface
•
•
•
Examples
This example shows how to add a description for an interface:
switch# configure terminalswitch(config)# interface ethernet 1/1switch(config-if)# description "10G Server Link"switch(config-if)#This example shows how to add a description for a virtual Ethernet interface:
switch# configure terminalswitch(config)# interface vethernet 1switch(config-if)# description "Virtual interface"switch(config-if)#Related Commands
description (SPAN, ERSPAN)
To add a description to an Ethernet Switched Port Analyzer (SPAN) or an Encapsulated Remote Switched Port Analyzer (ERSPAN) session configuration, use the description command. To remove the description, use the no form of this command.
description description
no description
Syntax Description
description
String description of the SPAN session configuration. This string is limited to 80 characters.
Command Default
No description is added.
Command Modes
SPAN session configuration mode
ERSPAN session configuration modeCommand History
4.0(0)N1(1a)
This command was introduced.
5.1(3)N1(1)
Support for ERSPAN was added.
Usage Guidelines
Use the description command to provide a reminder in the configuration to describe what certain SPAN sessions are used for. The description appears in the output of the following commands such as show monitor session and show running-config monitor.
Examples
This example shows how to add a description for a SPAN session:
switch# configure terminalswitch(config)# monitor session 9 type localswitch(config-monitor)# description A Local SPAN sessionswitch(config-monitor)#This example shows how to add a description for an ERSPAN session:
switch# configure terminalswitch(config)# monitor session 9 type erspan-sourceswitch(config-erspan-src)# description An ERSPAN sessionswitch(config-erspan-src)#Related Commands
destination (ERSPAN)
To configure an Encapsulated Remote Switched Port Analyzer (ERSPAN) destination IP address, use the destination command. To remove the destination ERSPAN IP address, use the no form of this command.
destination ip ip_address
no destination ip ip_address
Syntax Description
Command Default
None
Command Modes
ERSPAN session configuration mode
Command History
Usage Guidelines
You can configure only one destination IP address for an ERSPAN source session.
This command does not require a license.
Examples
This example shows how to configure an ERSPAN destination IP address:
switch# configure terminalswitch(config)# monitor session 1 type erspan-sourceswitch(config-erspan-src)# destination ip 192.0.3.1switch(config-erspan-src)#Related Commands
destination (SPAN session)
To configure a Switched Port Analyzer (SPAN) destination port, use the destination command. To remove the destination SPAN port, use the no form of this command.
destination interface {ethernet slot/port}
no source interface {ethernet slot/port}
Syntax Description
Command Default
None
Command Modes
SPAN session configuration mode
Command History
Usage Guidelines
Each local SPAN session destination session must have a destination port (also called a monitoring port) that receives a copy of traffic from the source port.
The destination port can be any Ethernet physical port and must reside on the same switch as the source port (for a local SPAN session). The destination port cannot be a source port, a port channel, or SAN port channel group.
A destination port receives copies of sent and received traffic for all monitored source ports. If a destination port is oversubscribed, it can become congested. This congestion can affect traffic forwarding on one or more of the source ports.
Examples
This example shows how to configure an Ethernet interface SPAN destination port and activate the SPAN session:
switch# configure terminalswitch(config)# interface ethernet 1/5switch(config-if)# switchport monitorswitch(config-if)# exitswitch(config)# monitor session 9 type localswitch(config-monitor)# description A Local SPAN sessionswitch(config-monitor)# source interface ethernet 1/1switch(config-monitor)# destination interface ethernet 1/5switch(config-monitor)# no shutdownswitch(config-monitor)#Related Commands
duplex
To specify the duplex mode as full, half, or autonegotiate, use the duplex command. To return the system to default mode, use the no form of this command.
duplex {full | half | auto}
no duplex {full | half | auto}
Syntax Description
full
Specifies the duplex mode as full.
half
Specifies the duplex mode as half.
Note
auto
Specifies the duplex mode as autonegotiate.
Command Default
None
Command Modes
Interface configuration mode
Command History
Usage Guidelines
The interface speed that you specify can affect the duplex mode used for an interface, so you should set the speed before setting the duplex mode. If you set the speed for autonegotiation, the duplex mode is automatically set to be autonegotiated. If you specify 10- or 100-Mbps speed, the port is automatically configured to use half-duplex mode, but you can specify full-duplex mode instead. Gigabit Ethernet is full duplex only. You cannot change the duplex mode on Gigabit Ethernet ports or on a 10/100/1000-Mbps port that is set for Gigabit Ethernet.
See the Cisco Nexus 5000 Series NX-OS Layer 2 Switching Configuration Guide for more information on interface speed and duplex settings.
This command does not require a license.
Examples
This example shows how to specify the duplex mode for full duplex:
switch# configure terminalswitch(config)# interface ethernet 1/5switch(config-if)# duplex fullswitch(config-if)#Related Commands
show interface
Displays information about the interface, which includes the duplex parameter.
dvs-name
To configure the Distributed Virtual Switch (DVS) name in the vCenter Server, use the dvs-name command.
dvs-name name [name]
Syntax Description
Command Default
None
Command Modes
SVS connection configuration mode
Command History
Usage Guidelines
This command does not require a license.
Examples
This example shows how to configure the DVS name in the vCenter Server:
switch# configure terminalswitch(config)# svs connection SVSConnswitch(config-svs-conn)# dvs-name vcWestswitch(config-svs-conn)#Related Commands
show svs connections
Displays SVS connection information.
svs connection
Enables an SVS connection.