- In this lesson,
we want to discuss two different technologies: LISP in VXLAN.
To give you an overview,
LISP is a way for us to identifying a network device
using a couple of identifiers.
One identifier identifies the location
of the device on the internet
and the other identifier identifies the device
within that location.
And one of the things this can help us with
is control the exploding size
of the BGP routing table on the internet.
We have several hundred thousand routes
in a full BGP routing table.
It's getting out of control.
Well, great news, LISP can help with them.
Then we'll take a look at VXLANs.
VXLANs give us more broadcast domains
than we would have with regular VLANS
where we have a little
over 4,000 different broadcast domains.
We can have lots more but do we need lots more?
Yes, in a data center we could very easily exceed
that 4,000 and some VLANs that we normally have access to.
And something else that VXLANs can do for,
it can allow the same broadcast domain
to exist across a layer three boundary.
We're going to talk about both of those in this lesson,
but let's get started with a discussion of LISP.