At the end of the day, if we have our network in place,
we want it to work, and we want it to work quickly.
And we built some [INAUDIBLE] tolerance.
We have dynamic routing protocols.
If there's a change in the network
and can be dynamically communicated
and different paths can be taken, that's great.
We have first hop redundancy protocols,
like HSRP and Gateway Load Balancing Protocol.
So, if there's a failure on one of our devices,
the other one can take over.
It's wonderful.
However, what isn't so wonderful is how long it might take.
If we have a failure in the network WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
If we have a failure in the network
and it takes 45 or 50 seconds for a new path
to be determined, that's a long time.
So, in this video, in these set of videos,
I'd like to chat with you about using Bidirectional Forwarding
Detection.
And so, what we'll do is we'll explain
what it is, how it can be used, and then
I'll do a few demonstrations of using it in combination
with some Dynamic Routing Protocols and static routes,
so you can get a feel for how effective it really can be.
So, without further ado, I'll see you in the next video.