Routing Protocols and Traffic Forwarding | Network Fundamentals Part 19

Ready to continue your routing journey? Surely you’ve noticed that it can be a pain to configure static routes all the time. It takes forever, they’re difficult to troubleshoot, they don’t adapt to network changes very well, and it’s easy to make a typo.

The alternative is dynamic routing. Dynamic routing protocols, such as RIP, EIGRP, OSPF, and BGP help us as they’re more aware of what’s going on. For example, if there’s a fault, they are able to route traffic along a different path.

We’ll be diving into RIP in the next video, but before we do that, you need to understand a few rules that routers follow.

The first is called Longest Prefix Match (LPM). This states that if the destination IP address matches more than one route in the routing table, the route with the longest subnet mask will be chosen.

The second is Administrative Distance (AD). Each source of routing information has an AD value assigned to it. So, if a route is learned from more than one source (for example, RIP and OSPF), the router will look at the administrative distance of both protocols, then it will decide that it prefers OSPF more, and put that route into the routing table.

We can manipulate administrative distance in some cases. We can create static routes with different AD’s, in order for them to become floating static routes. If the primary route (wherever it’s learned from) is lost, the floating static route can take its place.

Overview of this video:

0:00 Introduction

0:32 Dynamic Routing Protocols

2:06 Longest Prefix Match (LPM)

4:43 Administrative Distance (AD)

6:30 Floating Static Routes

8:00 Labs

LET'S CONNECT

#NetworkDirection
#networking
#routing

[Shelly-kxwz]

it's honestly so hard to find good AND well planned information on this topic.But you came to my rescue.
- A struggling university student

[mr.williamschiewe]

it went from alot of people to just a few that are dedicated to this series, great work keep it up....

[muthukumaran]

You guys are doing a great job... Keep this going forward
I have commented before seeing the video because I believe in your work

[nginangumbau]

All your videos have amazing content. Precise and easily understandable, great work

[AbouPandas]

Networks can be complicated, but they dont have to be. For just 1 dollar a day, you can save a network from failing.

[mohammadshouman]

Can we have a video about the fastest route regarding EIGRP and OSPF

[MrKigo]

Honestly... GREAT CONTENT! Keep it up :)

[bulgabattumur]

very useful lessons! btw, the links to your labs are no longer working. :( i'd really like to play with a lab.