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I'd like you to imagine that
you and I been invited to take

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a tour of a corporate network.

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So we go in and they take
us to their data center.

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And we look at the routers
and switches and the servers

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and the firewalls and the
storage and have a good time.

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And if they asked
us, hey, what traffic

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is going through our network?

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How would we know?

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It's tough to know.

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And that's a good question
for the network managers

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themselves.

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And to get a visibility,
or to find out

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what is actually coursing
through the veins

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of our networks, we need
a tool that can do that.

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And one of those tools
is called NetFlow.

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And that's what
this set of videos
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And that's what
this set of videos

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is all about, about
how NetFlow works,

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the big picture,
how it's implemented

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in version 5, in version
9, and also version 10.

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And then, also, to take
a look at the pieces

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that if it's not
working correctly,

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where we would go to
look to troubleshoot it.

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So that's what we
have in store for us.

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And I'll see you in
the very next video

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as we take a look at the
big picture of NetFlow.