WEBVTT

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 Hello and welcome to this course from
 INE titled Loop Prevention with

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 RSTP. My name is Keith Bogart and I
 will be your instructor during the

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 duration of this course.

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 Should you have any questions after this
 course is done, please feel free

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 to reach out to me.

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 You can see my email address here, my
 Twitter handle and my LinkedIn contact

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 information. So what are the prerequisites
 for this course?

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 What do you need to know coming into
 it to get the most out of it?

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 Well, there's not a lot.

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 Number one, I want to make sure you
 know the difference between unicast

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 and broadcast traffic.

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 You need to have an understanding of
 the default forwarding behavior of

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 switches. Or another way of saying
 that is, if I ask you the question,

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 when does a switch flood a frame?

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 When would it choose
 to drop a frame?

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 When would it choose to forward
 a frame out only one interface?

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 You should be able to answer
 those questions.

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 And you should be able to have some
 knowledge of VLANs and VLAN trunks

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 and their usage.

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 And lastly, you should be able to
 recognize Ethernet MAC addresses.

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 All right, so what are the
 objectives of this course?

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 What are you going
 to get out of it?

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 A lot of things.

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 So number one, you're going to be able
 to explain why bridging loops are

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 harmful in a switched network.

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 So if you don't already
 know that, you will.

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 You'll also be able to summarize the
 basic operation of rapid spanning

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 tree forwarding and
 discarding ports.

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 Why do ports go into forwarding?

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 Why do they go into discarding?

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 What's the logic that causes
 them to reach that state?

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 You'll also be able to predict a rapid
 spanning tree topology if provided

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 with a required minimum criteria.

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 If I show you a topology and I give
 you things like MAC addresses and

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 port numbers and link bandwidths, you
 will be able to predict in advance

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 how that topology will play out with
 rapid spanning tree, what it will

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 do with that topology.

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 You'll be able to manipulate rapid
 spanning tree topologies so you can

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 accomplish load balancing.

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 And then you'll also be able to understand
 the rapid spanning tree sync

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 process and the topology
 change processes.

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 If you're already familiar with the
 older version of spanning tree, the

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 original 802.1D that was standardized
 in 1998, how rapid spanning tree

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 handles topology changes in particular
 is very, very different than that.

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 So there's a whole lot of stuff you're
 going to learn in this course.

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 I look forward to teaching it with
 you and let's get started.