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- In this video, I'd like to show you

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how to change the terminal emulator

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that GNS3 uses.

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As of this recording, anyway,

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the end of February 2016,

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GNS3 defaults using PuTTY
as a terminal emulator,

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say that five times fast.

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And the problem with PuTTY,

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at least as of right now,

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is that if you have any
more than one router

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in your typology;

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every time you open a
terminal to the router,

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it opens a new window within your screen.

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For example, so right now,

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I am default to Putty

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and if I double-click a router,

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there it is, a PuTTY
window was just opened,

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if I double-click another router,

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a new PuTTY window was just opened.

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And so you can see that after a while,

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after having five or
six or seven of these,

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depending on how large your typology is,

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it can get kind of unwieldy
going back and forth

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between these different windows,

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making sure they're arranged
properly on your screen.

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And so, if you're like me,

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you'd probably prefer to use

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a different terminal emulation program

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that actually has the tab capability.

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In other words, it means that when

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that terminal emulation
application opens up,

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every new instance that
you click on for router,

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will open within one window

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and they'll be tabbed.

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They'll be like right next to each other,

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or horizontal, or vertical,

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rather than having separate windows

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all over your desktop.

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So, the question is, how do you change

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to using SecureCRT or whatever

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other terminal emulator that you wish

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that supports that capability,

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or maybe you want

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other capabilities that just
aren't built into PuTTY.

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Okay, it was actually pretty simple.

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I'll go ahead and close this.

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So, what you're gonna want to do is,

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up here, in the upper left,

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you're gonna want to
click where it says Edit,

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and then Preferences.

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And then here under General Preferences,

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you want to click on the tab that says

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Console Applications.

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Now you can see by default,

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it uses PuTTY,

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but I don't want that,

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in my case, I want to use SecureCRT.

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So, I'll click this first
Edit button, right here,

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and from the drop down window,

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I will select,

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in my particular case, SecureCRT.

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Now you can see there's lots
of other ones in here as well

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and if a particular application

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you're looking for isn't in here,

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then you could select Custom.

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But I'm just going to do SecureCRT

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and now, in my particular case,

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because I've already
used GNS3 lots of times

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before I did this video,

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it knew exactly where
Secure CRT was located,

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and also put in all these arguments here.

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So, I want to talk a
little bit more about,

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what if you don't get that.

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What if you choose Secure CRT

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and it doesn't know the path?

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Or the path it came up with is wrong?

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Or the path is right, but it doesn't have

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any of these arguments.

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Okay, so let's take step number one.

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Let's just assume that it's SecureCRT and

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the GNS3 was unable to

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by default

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locate the path

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of where SecureCRT is located.

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So, in other words, when you did it,

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it came up like this.

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Just empty,

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or maybe you're just doing custom,

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either way.

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Okay, so I'm going to cancel out of this,

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minimize GNS3,

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and I'm gonna open up SecureCRT,

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just by itself, from my
Start and Programs window.

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Okay, so it's running right now.

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So the next thing I'm going
to do is, on my laptop,

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I'm gonna go into the Task Manager.

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And I'll bring it over here,

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so that you can see it.

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Alright and from the Task Manager,

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I'm going to select on View,

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and I'm gonna do Select Columns.

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And within all these things here,

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now this is showing you, when
you open up the Task Manager,

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what information about each
project or each process,

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is it showing you?

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Well, I actually want to see the path

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to every process,

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so I will go down here.

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And actually, this is
already selected for me.

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For you, it might not be,

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but you want to make sure

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that you select Image Path Name,

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and then okay.

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So once again, that was under Options,

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no, that was under, View, Select Columns.

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View, Select Columns,

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and then make sure you
select Image Path Name.

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And so now, within here,
not only will you see

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all the stuff that's running,

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but you'll also see, like it says,

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the image path.

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So let me go ahead and find,

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let's sort this by name,

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so it's alphabetical.

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Scroll down.

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I have SecureCRT running right now

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and right here we can see the image path.

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So you're gonna want to
write that down somewhere,

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or you're gonna want to like
take a screenshot of that,

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but basically, you're gonna want to know

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what that image path is.

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And so once you find the image path,

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you can close SecureCRT.

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You don't need it anymore.

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Go back to GNS3.

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Edit,

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Preferences,

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Console Application,

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Edit,

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Secure CRT.

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And if yours came up empty like this,

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you're gonna want to go ahead and

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plug in the path.

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You're gonna want to start
it with a quotation mark

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and then end the path

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with a quotation mark.

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So just copy and paste it in there.

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Now before I leave it,

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if I just hit okay at this point,

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it still wouldn't work.

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It actually would open up
the SecureCRT application,

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but it would not open up
a window to the router

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I had clicked on

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and that's why we need

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these additional arguments right here,

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/N, all the way to %p.

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Now if you're like me, you wonder,

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what does all this stuff do?

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So I did a little bit of
research and here, you can see.

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Go ahead and right now,

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if you want, go ahead

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and pause the video

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and read through each one of these things

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and that will give you a better idea

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of what all these different arguments do.

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But you want to make sure

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you have those arguments in there,

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after the path name.

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So I'm just gonna copy those,

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go back here, do a space,

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paste them in,

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Okay,

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then hit Apply.

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Make sure that everything
looks good up here.

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Yeah, it looks good.

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It's got everything I typed in.

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Apply.

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Okay.

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And now when I hit R1,

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it opens it up within SecureCRT.

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And now when I go back and I hit R2,

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it opens a second window,

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a second tab within SecureCRT

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because I used the /T option,

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which told SecureCRT

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to open this up within tabs.

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And so now this can be a lot more useful

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when working with multiple routers

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at the same time.