We're starting with a blank slate for this particular lab and no diagram because I want you to get used
to the fact that sometimes you going to go into a client side or maybe even have to handle an exam question
practice or otherwise without a nice neat diagram.
You've got to learn a little this information yourself as to what's going on.
I haven't planted a problem here for you but I just want you to get used to gathering information on
your own rather than always having a picture there goes.
Believe me that's not always going to happen.
So what is a really good command just to even get started to see what's running on this rally right
now.
As far as a routing protocol and that's a huge hit.
That last word show IP protocols always come home to show IP protocols and you can see here that I first
off configured to rape and I did take the previous con figs off from the last video and then put some
new ones on.
So that's what we're actually gathering information on here.
And you can see left of the defaults as far as the timers we've seen that sending up data every 30 seconds
quite a while now but we can also see that I did successfully hard code version 2 for sending and receiving.
We also see that I have got eight loopback interfaces that I've entered and I've enable rep on.
So I've got something different going on there and assuming that I know.
But assuming you knew the 172 to have 123 0 network was the one we're working with and you'd see that
will show config.
We can also see that we're getting information from 123 too and we know where that is from all these
labs.
We know that's router 2.
If we're routing for these two networks and we know that 172 12 0 0 is the serial network then what
network must be running these loop backs on.
I must be running them on 20 0 0 0 and we'll have a quick look and just verify that on show con Feg.
And there are the loop back and you can see exactly what I've done here is taken one address from each
of those eight subnets put on the loop bags.
And we know that I'm advertising them with Rep.
So right now if we go down to router 2 we should see an individual entry for each one of those up that's
And we do and we'll do it in just a couple of them
love show IP protocol she can walk in without a diagram you can walk in not knowing what's going on
you run that you write out a couple of things and all of a sudden you know you're on your way.
So we're never really trouble shooting anything here because there's not really a problem here with
this particular routing table.
But I think you know already what I'm going to say and that's what we really like our tables to be complete
and concise and you know what screaming at us right here is this one $23 one.
Next stop IP address for every single route in this table.
So what we could do is configure a default route and that would bring the table down while still allowing
router to to communicate with all of those looped backs.
And frankly any loot backs that were added because the next hop is going to be 123 out one period.
So hell can we do that we've already done a default static route I want to show you a different way
of generating a default route.
And I'm going to make a couple of pointers here if you haven't even seen OSPF before don't worry about
it.
But I'm going to mention it here because the command I'm about to show you is also a popular OSPF command
and it works a little bit differently in OSPF than it doesn't.
REP.
So when we get to the OSPF section I will mention that again and we'll draw a clear line as to what
this command does with rape and what it can do with SPF.
So with no further ado let's see what this command is.
We're going under the Ripp router process and it starts with default and we can a lot of options just
for default route.
What we're using here is a command called default information originate.
And there is a pesky little hyphen here in between default and informations.
First couple times you entered in a lab environment might trip over that just watch out for that.
And here's the definition control distribution of default information.
Wow that's that's heavy doesn't make any sense.
Well I should say it doesn't make any sense I should say that it's not terribly helpful you know sometimes
IOL s'help just says hey here's what this commando's and then sometimes you get control the distribution
of the false information.
Well thank you very much.
Let's go ahead and see exactly what this command does because the only option I have with this is originate.
So it's the full Typhon original information then the word originate.
And it says distribute a default route.
OK.
They don't have a route map reference and route mapping is for your future studies you do not have to
worry about it right now it's not part of this layout.
But notice that I don't have any other options.
And when we come to distribute a default route I assure you that I do not have a route here on router
1 a default route that is.
So what's going to happen if I try to originate or distribute a default route in Rhyl on router 1 if
I don't have one.
Let's find out let's go ahead.
Hit enter.
So nothing bad happened there let's go now on a route or two and have a look at our wrap around the
table and we've got a new route.
Now again router 1 did not have a default route to distribute but the default information originate
command in Rip allows a router to advertise the default route that it actually doesn't even have.
Hmm.
So that's a pretty powerful command.
Now the thing is though we love this because we see the asterisk there we know that asterisk indicates
the default route.
And we look at this and that's what our default route default route looks like.
There is our ministry of distance there is our metric there's our next up IP address and all this is
wonderful but notice that all of the non-default routes are still en route or two's routing table and
that's not really what we want.
If we're trying to shrink the routing table down.
So I want to show you that by default the default information originate command and read up a couple
of things to notice about it.
First off we've already seen this but I want to mention again with Router one router one did not have
a default route to distribute but the default information originate command allowed it to do so it's
advertising a default route but it's not doing anything about the more specific routes.
And that's why we see all these rip routes down here.
Now if we want to filter these out there is a way to do it.
It's beyond the scope of the CCMA exam.
But I am going to show it to you because it's a handy thing to know.
But there's that but I know I mentioned this at the end of the previous video is going to give you a
little bonus information here.
This is what I was talking about about filtering these routes out but you need to understand access
lists first and that section is coming.
So what we're going to do in the access list section is revisit this lab.
We're going to come right back to this point.
I'm going to show you how to filter the routes out and then if I show it to you now it might not stick
with you because some of you haven't even seen an access list in action yet and I don't want you to
see them until we do some walkthrough and some simple or work with them.
So we will come back to this.
But again those are some important points with that false information originate command with Ripp And
when we use it with no SPF.
Later in the course we'll make sure to draw a line there see what it does with Ripp see what it does
with no SPF so on exam day you are crystal clear on the differences for now.
By golly I think that is enough really for those of you who haven't done the subsetting section yet.
That's coming up next.
If you did the sudden ending section before this section certainly feel free to walk through it again.
But if not you can go ahead to the access list material.
One way or the other.
Let's move forward.