[AUDIO LOGO]
Hello and welcome to implementing OSPF as the CE-PE.
In this skill, we're going to be focusing
on the caveats of using OSPF between the provider
and the customer.
The first thing we want to look at is route types.
If you're following along from our previous skill,
we already have OSPF up and running in an MPLS layer 3
environment, but those routes are currently coming through
as external routes.
That's not really desirable for the customers
so we'd rather have them come in as internal routes.
So we'll be controlling our route types in our environment.
The second thing we want to look at
is going to be loop prevention in OSPF in relation to MPLS,
specifically we're talking about the downward bit.
So we'll see when and how the downward bit gets
set, when it gets looked at, when it gets ignored,
and how that can cause situations for our customer
depending on how they want to run their network,
and then, of course, how to fix that.
And then we'll wrap up with talking about SHAM links.
SHAM links are not really all that common in the MPLS
environment because they do take a bit of work
on the service provider side, therefore,
scalability is an issue.
However, they can be used to solve some specific issues
that our customers may have with path selection
if they want to have a backup link
and use the MPLS environment as their primary path.
So as you can hear, we have a lot of stuff to cover.
Hopefully, we'll have a lot of fun.
Let's go ahead and jump in and get
started, and I'll see you in the next video.