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[AUDIO LOGO]

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Welcome to Explain Inbound
BGP path selection.

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In this skill, we're going to be
focusing on the attributes that

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are generally used to
effect our return traffic

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or our inbound traffic.

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The first of these is going
to be AS path prepending.

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With AS path
pretending, we're going

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to be adding AS
numbers to the AS path

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to influence the traffic to
not come in a certain path.

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Therefore, causing it
to come in another path.

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That's the idea behind
AS path pretending.

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Then, we're going to look
at multi-exit discriminator,

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or the MED.

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The MED is generally used
between two neighboring

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As's that have multiple
paths between them.

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And by default, that's
actually all we can use it for.

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However, MED does have a couple
of features we can turn on

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and it does have
some caveats that

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allow us to do some rather
interesting things with MED.

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So we'll be exploring
that in great detail.

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So those are going to be our
two major topics for this skill.

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Let's go ahead and jump in.

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I'll see you in the next video.

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