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.
Syntax Description
Command Default
Command Modes
Virtual Ethernet interface configuration
Command History
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Usage Guidelines
Examples
This example shows how to enable a virtual Ethernet interface:
Related Commands
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Displays the virtual Ethernet interface configuration information. |
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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.
Syntax Description
Throughput delay in tens of microseconds. The range is from 1 to 16,777,215. |
Command Default
Command Modes
Interface configuration mode
Subinterface configuration mode
Command History
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Examples
This example shows how to set a delay of 30,000 microseconds on an interface:
This example shows how to set a delay of 1000 microseconds on a subinterface:
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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.
Syntax Description
String description of the interface configuration. This string is limited to 80 characters. |
Command Default
Command Modes
Interface configuration mode
Subinterface configuration mode
Virtual Ethernet interface configuration
Command History
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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.
Examples
This example shows how to add a description for an interface:
This example shows how to add a description for a virtual Ethernet interface:
Related Commands
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Displays the virtual Ethernet interface configuration information. |
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Displays the contents of the currently running configuration file. |
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.
Syntax Description
String description of the SPAN session configuration. This string is limited to 80 characters. |
Command Default
Command Modes
SPAN session configuration mode
ERSPAN session configuration mode
Command History
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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:
This example shows how to add a description for an ERSPAN session:
Related Commands
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Displays the running configuration information of a SPAN session. |
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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.
Syntax Description
Command Default
Command Modes
ERSPAN session configuration mode
Command History
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Usage Guidelines
You can configure only one destination IP address for an ERSPAN source session.
Examples
This example shows how to configure an ERSPAN destination IP address:
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Displays the running configuration information of a SPAN session. |
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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
Command Modes
SPAN session configuration mode
Command History
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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:
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Displays the running configuration information of a SPAN session. |
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.
no duplex { full | half | auto }
Syntax Description
Specifies the duplex mode as half. Note This keyword is not supported on a management interface. |
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Command Default
Command Modes
Command History
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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.
Examples
This example shows how to specify the duplex mode for full duplex:
Related Commands
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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.
Syntax Description
DVS name. The name can be a maximum of 80 alphanumeric characters. |
Command Default
Command Modes
SVS connection configuration mode
Command History
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Usage Guidelines
Examples
This example shows how to configure the DVS name in the vCenter Server:
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