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[AUDIO LOGO]

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So our first step to configuring
MPLS traffic engineering

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is going to be to
configure the feature

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on the appropriate interfaces
in our network core.

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So as we jump into the
command line to do that,

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let's start by looking
at our topology,

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so of course, we
know which routers

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and which interfaces
we need to configure.

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And then let's jump
in to the command line

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and get our journey to setting
up MPLS traffic engineering

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tunnels on its way.

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So for this skill, we're going
to be using MPLS topology 1.

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And as you can see
here, the main MPLS core

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is routers 1, 2, 3, 4, and 5.

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In order to configure
traffic engineering,

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we're going to need
that configured

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on all of the inside interfaces
on all of these routers.

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So just as an example,
gigabits 1 and 2 on routers

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1 and 2, all of the gigabit
interfaces on router 3.

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And router 5, we're going to
need just these 2 interfaces,

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gigabit 1.3 and gigabit 1.4.

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Of course, router 4 will
be configured the same

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as router 3, all
of its interfaces.

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So let's go ahead and
jump into the command line

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and get started.

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We'll go ahead and
start on router 1.

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So let's just start off
with a show MPLS interface.

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And what we can see is that our
2 gigabit interfaces, gigabit

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1 and gigabit 2, are
both enabled for LDP,

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however, they're not
enabled for tunneling.

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So let's go ahead
and configure that.

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On IOS XR, we do this by
going into MPLS traffic

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engineering config, and then
we simply add our interfaces.

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So we'll add gigabit
1 and gigabit 2,

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and commit those changes.

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We'll do our show
MPLS interface again.

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And now we see that both of
those interfaces are, in fact,

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enabled for tunneling.

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So let's go do the
same thing on router 2.

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So first, we'll make
sure MPLS is enabled

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on the appropriate interfaces.

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We see here that it is.

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Go back into configuration,
into traffic engineering,

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and at our interfaces.

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And now we see that they're
enabled for the tunnels.

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So now under router 3.

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Part of the reason
for doing this

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is also to verify that
we're running MPLS

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on all of the interfaces
on the appropriate routers.

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We can see that
router 3 is running

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on all of its interfaces.

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So we'll simply add all of
those interfaces to MPLS

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traffic engineering and
verify one last time.

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Little too fast, we'll
give it a second.

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There we go.

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So now tunneling is enabled
on all of those interfaces.

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And of course, we'll configure
router 4, it'll be the same.

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So we see here that router
4 is the same interfaces

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as router 3.

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It's the first 4
gigabit interfaces.

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We'll configure them
for traffic engineering,

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commit our changes,
and we'll verify.

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Once again, a little too fast.

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You can see it does take
IOS XR just a second

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to enable that feature.

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There we go.

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Now, the interfaces are
configured for tunneling.

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Last but not least, we
have to do router 5.

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So first, we'll
check our interfaces.

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Now, of course,
this being IOS XE,

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this is going to get configured
just a little bit differently.

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From global configuration, we
say MPLS traffic engineering

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tunnels, this enables
the feature globally.

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Then we go into each
interface, on this router,

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it's interface gigabit 1.3.

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And then it's the
exact same command,

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but under the
interface to enable it

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for each individual interface.

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We need gigabit 1.3 and 1.4.

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We'll exit out of configuration.

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And we see that
now this router is

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enabled for tunneling as well.

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So in this video,
all we did is verify

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that MPLS is actually running
on the correct interfaces

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on our routers and
we enable those

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interfaces to support MPLS
traffic engineering tunnels.

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This feature does have to be
enabled on each interface.

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Remember on IOS XE, we
have to enable it globally

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and under the interface.

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IOS XR, of course,
it's all under

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its own separate configuration
section, which sort of takes

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care of both at the same time.

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The next thing we're
going to have to do

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is set up RSVP in the core.

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And that's exactly what
we're going to do next.

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Until then, I hope this has
been informative for you,

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and I'd like to thank
you for viewing.

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