Cisco Nexus 1000V Command Reference, Release 4.0(4)SV1(1)
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Table Of Contents

A Commands

aaa authentication login console

aaa authentication login default

aaa authentication login error-enable

aaa authentication login mschap

aaa group server radius

aaa group server tacacs+


A Commands

This chapter describes the Cisco Nexus 1000V commands that begin with A.

aaa authentication login console

To configure AAA authentication methods for console logins, use the aaa authentication login console command. To revert to the default, use the no form of this command.

aaa authentication login console {group group-list} [none] | local | none}

no aaa authentication login console {group group-list [none] | local | none}

Syntax Description

group

Specifies to use a server group for authentication.

group-list

Specifies a space-separated list of server groups. The list can include the following:

•radius for all configured RADIUS servers.

•tacacs+ for all configured TACACS+ servers.

•Any configured RADIUS or TACACS+ server group name.

none

Specifies to use the username for authentication.

local

Specifies to use the local database for authentication.


Defaults

local

Command Modes

Global Configuration (config)

Supported User Roles

network-admin

Command History

Release
Modification

4.0(4)SV1(1)

This command was introduced.


Usage Guidelines

The group radius, group tacacs+, and group group-list methods refer to a set of previously defined RADIUS or TACACS+ servers. Use the radius-server host or tacacs-server host command to configure the host servers. Use the aaa group server command to create a named group of servers.

Use the show aaa group command to display the RADIUS server groups on the device.

If you specify more that one server group, the software checks each group in the order that you specify in the list.

If you specify the group method or local method and they fail, then the authentication can fail. If you specify the none method alone or after the group method, then the authentication always succeeds.

The command operates only in the default VDC (VDC 1).

Examples

This example shows how to configure the AAA authentication console login methods: 

n1000v# config t

n1000v(config)# aaa authentication login console group radius

This example shows how to revert to the default AAA authentication console login method: 

n1000v# config t

n1000v(config)# no aaa authentication login console group radius

Related Commands

Command
Description

aaa group server

Configures AAA server groups.

radius-server host

Configures RADIUS servers.

show aaa authentication

Displays AAA authentication information.

show aaa group

Displays the AAA server groups.

tacacs-server host

Configures TACACS+ servers.


aaa authentication login default

To configure the default AAA authentication methods, use the aaa authentication login default command. To revert to the default, use the no form of this command.

aaa authentication login default {group group-list} [none] | local | none}

no aaa authentication login default {group group-list [none] | local | none}

Syntax Description

group

Specifies a server group list to be used for authentication.

group-list

Space-separated list of server groups that can include the following:

•radius for all configured RADIUS servers.

•tacacs+ for all configured TACACS+ servers.

•Any configured RADIUS or TACACS+ server group name.

none

(Optional) Specifies to use the username for authentication.

local

Specifies to use the local database for authentication.


Defaults

local

Command Modes

Global Configuration (config)

Supported User Roles

network-admin

Command History

Release
Modification

4.0(4)SV1(1)

This command was introduced.


Usage Guidelines

The group radius, group tacacs+, and group group-list methods refer to a set of previously defined RADIUS or TACACS+ servers. Use the radius-server host or tacacs-server host command to configure the host servers. Use the aaa group server command to create a named group of servers.

Use the show aaa group command to display the RADIUS server groups on the device.

If you specify more that one server group, the software checks each group in the order that you specify in the list.

If you specify the group method or local method and they fail, then the authentication fails. If you specify the none method alone or after the group method, then the authentication always succeeds.

Examples

This example shows how to configure the AAA authentication console login method: 

n1000v# config t

n1000v(config)# aaa authentication login default group radius

This example shows how to revert to the default AAA authentication console login method: 

n1000v# config t

n1000v(config)# no aaa authentication login default group radius

Related Commands

Command
Description

aaa group server

Configures AAA server groups.

radius-server host

Configures RADIUS servers.

show aaa authentication

Displays AAA authentication information.

show aaa group

Displays the AAA server groups.

tacacs-server host

Configures TACACS+ servers.


aaa authentication login error-enable

To configure an AAA authentication failure message to display on the console, use the aaa authentication login error-enable command. To remove the error message, use the no form of this command.

aaa authentication login error-enable

no aaa authentication login error-enable

Syntax Description

This command has no arguments or keywords.

Defaults

Disabled

Command Modes

Global Configuration (config)

Supported User Roles

network-admin

Command History

Release
Modification

4.0(4)SV1(1)

This command was introduced.


Usage Guidelines

If none of the remote AAA servers respond when a user logs in, the authentication is processed by the local user database. If you have enabled the display, one of the following message is generated for the user: 

Remote AAA servers unreachable; local authentication done.

Remote AAA servers unreachable; local authentication failed.

Examples

This example shows how to enable the display of AAA authentication failure messages to the console: 

n1000v# config t

n1000v(config)# aaa authentication login error-enable

This example shows how to disable the display of AAA authentication failure messages to the console: 

n1000v# config t

n1000v(config)# no aaa authentication login error-enable

Related Commands

Command
Description

show aaa authentication login error-enable

Displays the status of the AAA authentication failure message display.


aaa authentication login mschap

To enable Microsoft Challenge Handshake Authentication Protocol (MSCHAP) authentication at login, use the aaa authentication login mschap command. To disable MSCHAP, use the no form of this command.

aaa authentication login mschap

no aaa authentication login mschap

Syntax Description

This command has no arguments or keywords.

Defaults

Disabled

Command Modes

Global Configuration (config)

Supported User Roles

network-admin

Command History

Release
Modification

4.0(4)SV1(1)

This command was introduced.


Usage Guidelines

Examples

This example shows how to enable MSCHAP authentication: 

n1000v# config t

n1000v(config)# aaa authentication login mschap

This example shows how to disable MSCHAP authentication: 

n1000v# config t

n1000v(config)# no aaa authentication login mschap

Related Commands

Command
Description

show aaa authentication login mschap

Displays the status of MSCHAP authentication.


aaa group server radius

To create a RADIUS server group, use the aaa group server radius command. To delete a RADIUS server group, use the no form of this command.

aaa group server radius group-name

no aaa group server radius group-name

Syntax Description

group-name

RADIUS server group name.The name is alphanumeric and case-sensitive. The maximum length is 64 characters.


Defaults

None

Command Modes

Global Configuration (config)

Supported User Roles

network-admin

Command History

Release
Modification

4.0(4)SV1(1)

This command was introduced.


Usage Guidelines

Examples

This example shows how to create a RADIUS server group and enter RADIUS Server Configuration mode for configuring the specified server group: 

n1000v# config t

n1000v(config)# aaa group server radius RadServer

n1000v(config-radius)#

This example shows how to delete a RADIUS server group: 

n1000v# config t

n1000v(config)# no aaa group server radius RadServer

Related Commands

Command
Description

show aaa groups

Displays server group information.

radius-server host

Defines the IP address or hostname for a RADIUS server.


aaa group server tacacs+

To create a TACACS+ server group, use the aaa group server tacacs+ command. To delete a TACACS+ server group, use the no form of this command.

aaa group server tacacs+ group-name

no aaa group server tacacs+ group-name

Syntax Description

group-name

TACACS+ server group name. The name is alphanumeric and case-sensitive. The maximum length is 64 characters.


Defaults

None

Command Modes

Global Configuration (config)

Supported User Roles

network-admin

Command History

Release
Modification

4.0(4)SV1(1)

This command was introduced.


Usage Guidelines

You must enable TACACS+ using the tacacs+ enable command before you can configure TACACS+.

Examples

This example shows how to create a TACACS+ server group: 

n1000v# config t

n1000v(config)# aaa group server tacacs+ TacServer

n1000v(config-radius)#

This example shows how to delete a TACACS+ server group: 

n1000v# config t

n1000v(config)# no aaa group server tacacs+ TacServer

Related Commands

Command
Description

tacacs+ enable

Enables TACACS+.

show aaa groups

Displays server group information.