Cisco 2501 - Router - EN Manual do Utilizador descarregar pdf (Página 27)

Router and Switch Administrative Configurations

205

% Login disabled on line 1, until 'password' is set

Todd(config-line)#password aux

Todd(config-line)#login

It’s important to remember the login command or the auxiliary port won’t prompt for

authentication.

Notice that Cisco has begun this process of not letting you set the login command before

a password is set on a line because, if you set the login command under a line and then don’t

set a password, the line won’t be usable. And it will prompt for a password that doesn’t exist.

So this is a good thing—a feature, not a hassle!

Definitely remember that although Cisco has this new “password feature” on

its routers starting in its newer IOS (12.2 and above), it’s not in all of its IOSes.

Console Password

To set the console password, use the line console 0 command. But look at what happened

when I tried to type line console 0 ? from the (config-line)# prompt—I received an

error. You can still type line console 0 and it will accept it, but the help screens just don’t

work from that prompt. Type exit to get back one level and you’ll find that your help screens

now work. This is a “feature.” Really.

Here’s the example:

Todd(config-line)#line console ?

% Unrecognized command

Todd(config-line)#exit

Todd(config)#line console ?

<0-0> First Line number

Todd(config-line)#password console

Todd(config-line)#login

Since there’s only one console port, I can only choose line console 0. You can set all your

line passwords to the same password, but for security reasons, I’d recommend that you make

them different.

There are a few other important commands to know for the console port.

For one, the exec-timeout 0 0 command sets the time-out for the console EXEC session

to zero, which basically means to never time out. The default time-out is 10 minutes. (If you’re

feeling mischievous, try this on people at work: Set it to 0 1. That will make the console time out

in 1 second! And to fix it, you have to continually press the down arrow key while changing the

time-out time with your free hand!)

logging synchronous is a very cool command, and it should be a default command, but

it’s not. It stops annoying console messages from popping up and disrupting the input you’re

trying to type. The messages still pop up, but you are returned to your router prompt without

your input interrupted. This makes your input messages oh-so-much easier to read.

47020.book Page 205 Wednesday, January 2, 2008 4:31 PM

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Cisco 2501 - Router - EN Manual do Utilizador Página 27