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ip domain-lookup

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Command

IP Domain-Lookup

Use

This command allows the router to assume that any non-keyword entered in the command console is supposed to be resolved into an IP address. This is a default command.
Most people disable this command as it can be a frequent annoyance to those who mistype words on a regular basis.

Syntax

Router(config)#ip domain-lookup

Example

In this example command that doesn't exist is accidentally typed in. The router attempts to resolve this unrecognized command as an ip address, and takes awhile to do so. We disable this feature afterwards with no ip domain-lookup.

R2#wrong_command
Translating "wrong_command"...domain server (255.255.255.255)
(255.255.255.255)
Translating "wrong_command"...domain server (255.255.255.255)
% Unknown command or computer name, or unable to find computer address
R2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R2(config)#no ip domain-lookup
R2(config)#exit
R2#wrong_command
*Mar 1 02:13:07.747: %SYS-5-CONFIG_I: Configured from console by console
R2#wrong_command

Translating "wrong_command"
% Unknown command or computer name, or unable to find computer address
R2#



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