I Commands

This chapter describes the system management commands that begin with I.

ip access-list (session)

form of this command.

 
Syntax Description

Name of the IPv4 ACL. The name can be up to 64 alphanumeric characters and cannot contain a space or quotation mark.

 
Command Default

No IPv4 ACLs are defined by default.

 
Command Modes

Global session configuration mode

 
Command History

Release
Modification

4.0(0)N1(1)

This command was introduced.

Examples

This example shows how to create an IPv4 ACL for a configuration session:

switch# configure session MySession1
switch(config-s)# ip access-list myACL
switch(config-s-acl)#
 

 
Related Commands

Command
Description

Creates a configuration session.

Configures a deny rule in an IPv4 ACL.

Configures a permit rule in an IPv4 ACL.

Displays the contents of the session.

 

ip dns source-interface

form of this command.

}]

}]

 
Syntax Description

Specifies the Ethernet interface to use as the source interface. The slot number is from 1 to 255 and the port number is from 1 to 128.

Specifies the loopback interface to use as the source interface. The range of values is from 0 to 1023.

(Optional) Specifies the virtual routing and forwarding (VRF) instance.

(Optional) VRF name. The name is case sensitive and can be a maximum of 32 characters.

(Optional) Specifies the default VRF.

(Optional) Specifies the management VRF.

 
Command Default

None

 
Command Modes

Global configuration mode

 
Command History

Release
Modification

5.1(3)N1(1)

This command was introduced.

 
Usage Guidelines

This command does not require a license.

Examples

This example shows how to configure an Ethernet interface as the source interface for a DNS lookup:

switch# configure terminal
switch(config)# ip dns source-interface ethernet 1/5
switch(config)#
 

 
Related Commands

Command
Description

Enables the DNS lookup feature.

Displays information about the DNS source interfaces.

ip domain-list

command. To disable the IP domain list, use the no form of the command.

]

]

 
Syntax Description

Specifies the domain name for the IP domain list. The name can be any case-sensitive, alphanumeric string up to 63 characters.

(Optional) Specifies the virtual routing and forwarding (VRF) to use to resolve the domain domain name for the IP domain list. The name can be any case-sensitive, alphanumeric string up to 32 characters.

 
Command Default

None

 
Command Modes

VRF context configuration mode

 
Command History

Release
Modification

5.0(3)N1(1)

This command was introduced.

 
Usage Guidelines

command to configure additional domain names for the device. Use the vrf context command to enter the VRF context mode to configure additional domain names for a particular VRF.

Examples

This example shows how to configure the IP domain list for the default VRF:

switch# config terminal
switch(config)# ip domain-list Mysite.com
 

This example shows how to configure the IP domain list for the management VRF:

switch# config terminal
switch(config)# vrf context management
switch(config-vrf)# ip domain-list Mysite.com
 

This example shows how to configure the IP domain list for the default VRF to use the management VRF as a backup if the domain name cannot be resolved through the default VRF:

switch# config terminal
switch(config)# vrf context management
switch(config-vrf)# exit
switch(config)# ip domain-name Mysite.com use-vrf management
switch(config)# ip name-server 192.0.2.1
switch(config)# ip domain-list Mysite2.com

 
Related Commands

Command
Description

Displays information about the IP domain name configuration.

ip domain-lookup

form of this command to disable this feature.

 
Syntax Description

This command has no arguments or keywords.

 
Command Default

None

 
Command Modes

Global configuration mode

 
Command History

Release
Modification

5.0(3)N1(1)

This command was introduced.

 
Usage Guidelines

command to enable DNS.

Examples

This example shows how to configure the DNS server lookup feature:

switch# config terminal
switch(config)# vrf context management
switch(config-vrf)# exit
switch(config)# ip domain-name Mysite.com use-vrf management
switch(config)# ip name-server 192.0.2.1
switch(config)# ip domain-lookup
switch(config)#
 

 
Related Commands

Command
Description

Displays information about the DNS.

ip domain-name

form of the command.

]

]

 
Syntax Description

Domain name. The name can be any case-sensitive, alphanumeric string up to 63 characters.

(Optional) Specifies the virtual routing and forwarding (VRF) to use to resolve the domain name. The name can be any case-sensitive, alphanumeric string up to 32 characters.

 
Command Default

None

 
Command Modes

VRF context configuration mode

 
Command History

Release
Modification

5.0(3)N1(1)

This command was introduced.

 
Usage Guidelines

command to configure the domain name for the device. Use the vrf context command to enter the VRF context mode to configure the domain monastery for a particular VRF.

Examples

This example shows how to configure the IP domain name for the default VRF:

switch# config terminal
switch(config)# ip domain-name Mysite.com
switch(config)#
 

This example shows how to configure the IP domain name for the management VRF:

switch# config terminal
switch(config)# vrf context management
switch(config-vrf)# ip domain-name Mysite.com
switch(config-vrf)#
 

This example shows how to configure the IP domain name for the default VRF to use the management VRF as a backup if the domain name cannot be resolved through the default VRF:

switch# config terminal
switch(config)# vrf context management
switch(config-vrf)# exit
switch(config)# ip domain-name Mysite.com use-vrf management
 

 
Related Commands

Command
Description

Configures the IP domain list.

Enables the Domain Name Server (DNS) lookup feature.

Displays information about the IP domain name configuration.

ip host

form of this command.

]

]

 
Syntax Description

can be any case-sensitive, alphanumeric string up to 80 characters.

IPv4 address in the x.x.x.x format.

(Optional) Up to five additional IPv4 addresses in the x.x.x.x format.

 
Command Default

None

 
Command Modes

Global configuration mode

 
Command History

Release
Modification

5.0(3)N1(1)

This command was introduced.

 
Usage Guidelines

command to add a static hostname to DNS.

Examples

This example shows how to configure a static hostname:

switch(config)# ip host mycompany.com 192.0.2.1
 

 
Related Commands

Command
Description

Displays information about the IP domain name configuration.

ip name-server

form of the command.

 
Syntax Description

IP address for the name server.

(Optional) Specifies the virtual routing and forwarding (VRF) to use to reach the name-server. The name can be any case-sensitive, alphanumeric string up to 32 characters.

 
Command Default

None

 
Command Modes

VRF context configuration mode

 
Command History

Release
Modification

5.0(3)N1(1)

This command was introduced.

 
Usage Guidelines

command to configure the name server for the device. Use the vrf context command to enter the VRF context mode to configure the domain names for a particular VRF.

Examples

This example shows how to configure the IP name server for the default VRF:

switch# config terminal
switch(config)# vrf context management
switch(config-vrf)# exit
switch(config)# ip domain-name Mysite.com use-vrf management
switch(config)# ip name-server 192.0.2.1
 

This example shows how to configure the IP name server for the management VRF:

switch# config terminal
switch(config)# vrf context management
switch(config-vrf)# ip name-server 192.0.2.1
 

This example shows how to configure the IP name server for the default VRF to use the management VRF as a backup if the IP name server cannot be reached through the default VRF:

switch# config terminal
switch(config)# vrf context management
switch(config-vrf)# exit
switch(config)# ip domain-name Mysite.com use-vrf management
switch(config)# ip name-server 192.0.2.1 use-vrf management

 
Related Commands

Command
Description

Defines a list of domains.

Enables DNS-based host name-to-address translation.

Displays information about the IP domain name configuration.

Creates a virtual routing and forwarding (VRF) instance.

ip port access-group (session)

form of this command.

 
Syntax Description

Name of the IPv4 ACL. The name can be up to 64 alphanumeric, case-sensitive characters long.

Specifies that the ACL applies to inbound traffic.

Specifies that the ACL applies to outbound traffic.

 
Command Default

None

 
Command Modes

Session interface configuration mode

 
Command History

Release
Modification

4.0(0)N1(1)

This command was introduced.

Examples

This example shows how to apply an IPv4 ACL named ip-acl-01 to the Ethernet interface 1/2 as a port ACL:

switch# configure session MySession1
switch(config-s)# interface ethernet 1/2
switch(config-s-if)# ip port access-group ip-acl-01 in
switch(config-s-if)#
 

This example shows how to remove an IPv4 ACL named ip-acl-01 from Ethernet interface 1/2:

switch(config-s)# interface ethernet 1/2
switch(config-s-if)# no ip port access-group ip-acl-01 in
switch(config-s-if)#
 

 
Related Commands

Command
Description

Displays all ACLs.

Displays the contents of the session.