4 Command Line Interface

DNS Commands

These commands are used to configure Domain Naming System (DNS) services. You can manually configure entries in the DNS domain name to IP address mapping table, configure default domain names, or specify one or more name servers to use for domain name to address translation.

Note that domain name services will not be enabled until at least one name server is specified with the ip name-servercommand and domain lookup is enabled with the ip domain-lookupcommand

Table 4-73 DNS Commands

Command

Function

Mode

Page

 

 

 

 

ip host

Creates a static host name-to-address mapping

GC

4-210

 

 

 

 

clear host

Deletes entries from the host name-to-address table

PE

4-211

 

 

 

 

ip domain-name

Defines a default domain name for incomplete host names

GC

4-211

 

 

 

 

ip domain-list

Defines a list of default domain names for incomplete host names

GC

4-212

 

 

 

 

ip name-server

Specifies the address of one or more name servers to use for host

GC

4-213

 

name-to-address translation

 

 

ip domain-lookup

Enables DNS-based host name-to-address translation

GC

4-214

 

 

 

 

show hosts

Displays the static host name-to-address mapping table

PE

4-215

 

 

 

 

show dns

Displays the configuration for DNS services

PE

4-215

 

 

 

 

show dns cache

Displays entries in the DNS cache

PE

4-216

 

 

 

 

clear dns cache

Clears all entries from the DNS cache

PE

4-216

 

 

 

 

ip host

This command creates a static entry in the DNS table that maps a host name to an IP address. Use the no form to remove an entry.

Syntax

[no] ip host name address1 [address2 … address8]

•name - Name of the host. (Range: 1-64 characters)

•address1 - Corresponding IP address.

•address2 … address8 - Additional corresponding IP addresses.

Default Setting

No static entries

Command Mode

Global Configuration

4-210