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Want to secure as an example allows you to automatically lock down the router using Siska best practices

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but you need to be very careful choosing that option because you could lock yourself out of your own

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router.

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The router then shows you a summary of what you've configured and looking at some of the configuration.

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Notice we gave the router a name of our one we configured the Viti y lines used for telnet and S-sh

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with a password of Cisco.

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So the options that were chosen through the initial configuration dialog have now been converted into

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Cisco IOS commands that can be applied on the router at the end of the menu.

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We are prompted with three options.

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Zero go to the Iowas command prompt without saving this configuration.

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And that's what we want to do.

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1 return back to the set up with out saving this config to save this configuration to nv ram and exit

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so we can choose 0 because we don't want to use the configuration from the initial configuration dialog.

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We want to configure the router using Cisco Ioway commands you are told that you can to set up again

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by using the set up command but we're not interested in doing that.

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We're going to configure the router through the Selye commands.

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So we're going to hit enter or press Return to get started on the CLIA.

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And here we are.

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You can see that we presented with a prompt and this is known as user mode.

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Now as mentioned it's important that you get to know the various modes available on Cisco Rorrison switches.

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The first mode is user mode.

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Now the Cisco Iowas software is designed with a rock hill structure for various modes modes that you'll

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encounter include user mode which we're discussing right now privileged mode which we'll talk about

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in a moment as well as global configuration mode and other modes you can enter commands into the sea

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a lie by typing or copying and pasting the commands through your terminal emulation software.

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It's important that the right c'mon be topped in the right mood and the mood is indicated with a distinctive

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prompt the term prompt is used because the system is prompting you to make an entry.

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So by default every prompt begins with the device name which in this example would be Rodda because

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we haven't configured the name of the device following the name.

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The remainder of the prompt indicates the mode and in this case we are in user mode and we know that

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because it has a greater than sign behind the name of the router as you enter commands Moat's can change.

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So in a moment I'm going to show you how to type enable in user mode to go to privileged mode or enable

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mode and you'll see that the prompt changes when you press enter or hit carriage return.

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You're instructing the device to pass and execute the command that you've entered.

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Now once again this mode is user mode and it only gives us a limited number of basic monitoring commands.

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You can see the commands available in this mode by using question mark.

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So when I use a question mark I can see the commands available in this mode.

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Pressing enter will show me one additional line at a time.

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Some show commands are available in this mode including show version which allows me to see the version

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of operating system on the router.

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It also allows me to see other information including the amount of RAM installed in the router which

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interfaces are available on the router.

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Amount of nv ram available and how much flash is installed in the router by typing it's a question mark

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I'll be able to see which commands start with SH and I can use the tab key to complete a command.

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So if I type shows space question mark I'll be able to see the options available for the show command.

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If I press spacebar it shows me additional options one page at a time.

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Pressing enter once again shows me one additional line of options.

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So if I type shows space the question mark for example I can see which commands start with show the

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if I press enter.

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At this point I'm told that I've entered an ambiguous command because there are multiple commands that

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start with Chevvy.

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I can then use the key combination control P Or simply use the up arrow key to see the previously typed

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command all type E and press question mark again.

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And now I can see that there's only one command option available which is show version.

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If I press Enter at this point the rod accepts the command because that's the only option available

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to me if I try and type commands that are only valid in other modes in this mode the Rato will reject

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the command.

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So as an example I'll type confetti which should be typed in privilege mode.

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The router doesn't except the command conforte takes me to global configuration mode but requires me

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to be in privileged mode when I type that command.

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So the router doesn't except the command.

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It's a valid command but I'm in the wrong mode.

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So the command is not accepted the hostname command is only valid in global configuration mode.

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And once again if I try and type it in user mode the rod will reject the command.

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It's a valid command but I'm in the wrong mode.

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So the router doesn't accept it before you can do any configuration on the router switch.

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You need to go to enable mode or privileged mode and the way to do that is to type ECN.

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Or if I press tab the command is order completed to enable.

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And now I press Enter I'm taken to privilege mode or enable mode.

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Notice the prompt has changed from a greater than sign to a hash or pound sign.

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Whichever term you prefer using.