What many people refer to as the original flavor of IPsec site
to site VPNs with crypto maps does have some limitations.
So in this set of videos, what I would
like to do is chat with you about what some
of those limitations are and how we can solve that
by implementing GRE tunnels and then
using IPsec to protect the GRE.
And that's what this set of videos
is all about, starting in the very next one.
So I'll see you there in just a moment.