All right, let's look at this topology and we see we've got three different
questions identifying these three different parts of the network
and we want to make sure that we can answer these questions based on what we've
learned.
So first and foremost, a new site's being activated here over on the left, but
DHCP services aren't available.
What can be done to enable ZTP for this node?
Well, the idea here is that normally we'd rely on DHCP because this WAN Edge
device can go out to the ZTP Cloud
and help with the onboarding process. It's that zero touch provisioning. It WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
and help with the onboarding process. It's that zero touch provisioning. It
makes it so I don't have to have technical expertise on site when things aren't
going quite right.
But when we don't have DHCP, we're going to have to provide the IP address and
the gateway and the DNS information.
And again, we might not have technical expertise on site.
So fortunately, I can configure these into a bootstrap file and then I can send
that via USB over to that site and hopefully just have somebody insert the USB WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
that via USB over to that site and hopefully just have somebody insert the USB
into the device.
And then I can bootstrap and get it online at that point and we'll connect to
the ZTP Cloud and get onboarded to the rest of the network.
Next, number two here, given the noted VQE values, which path will be taken
toward the cloud service?
So it doesn't really matter which direction we're talking about here. Let's
just assume we're coming from the right.
We are looking at going this way through the internet and this way through the
internet and we have these two different values through the service providers. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
internet and we have these two different values through the service providers.
So the big question is do we remember is higher better or is lower better?
And with VQE, it's all about being higher, which means that we're going to go
through this circuit path and use internet service provider number two.
So this cloud on ramp for SAS, this is the conversation we're having here.
It allows us to bring traffic in and even though we've got two internet
circuits and we could just view internet circuits as all being the same. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
circuits and we could just view internet circuits as all being the same.
In the end, they're not the same and we can hopefully give our users better
experiences by choosing which internet service provider is better at that
moment in time.
Then number three, we've got these two different packets that have arrived. We
see they have the same source indestination IP and Mac, but different source
indestination ports.
So will they be evaluated as being a part of the same application?
Well, our evaluation is going to come back to that six-tupel, which does WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
Well, our evaluation is going to come back to that six-tupel, which does
include source indestination IP and does include source indestination ports.
We don't actually care about the Mac address. We're also by the way going to
look at DSCP and protocol number as well.
So keep that in mind. We didn't list all of them out here.
So these are our six source indestination IP ports. These two, if the ports are
different, they will not be evaluated as being part of the same application.
So when I'm identifying applications, I might want certain applications to go
this way. Some applications to go that way. That's thanks to application aware WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
this way. Some applications to go that way. That's thanks to application aware
routing that we can deploy and take advantage of the load balancing
capabilities of our SD-WAN edge devices.
So that is the end of this conversation here on SD-WAN. SD-WAN is a really
innovative set of technology that's been around at this point for a little
while, and a lot of organizations have at least taken steps towards deploying
it.
So it is a technology worth learning, but for the sake of this course, the
scope of the course, the scope of the exam covering these basic concepts at a WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
scope of the course, the scope of the exam covering these basic concepts at a
high level is really what we'd expect to see based on the blueprint.
So there is a lot more information here on CBT Nuggets website about SD-WAN. We
have a dedicated SD-WAN course for Cisco's exam for that particular topic.
So feel free to check that out if you want to learn it in a whole lot more
detail. I hope this has been informative for you, and I'd like to thank you for
viewing.