OSPF Network Types - FINALLY, an explanation that makes sense - Practical OSPF

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Every OSPF link is associated with an OSPF Network Type. There are 5 Network Types that exist: Point to Point, Broadcast, Non-Broadcast Multi-Access (NBMA), Point to Multipoint, and Point to Multipoint Non Broadcast (P2MP-NB).

Each Network Type acts slightly different in an effort to optimize OSPF's behavior. In this video, we look at the differences between all five OSPF network types.

This is lesson 13 of the Practical OSPF series. The full series is available here:

00:00 - Intro
00:45 - Point to Point and Broadcast Network Types
02:22 - Point to MultiPoint (P2MP)
02:53 - Full Mesh Connectivity vs Hub and Spoke
03:43 - Single IP Subnet
04:27 - WAN vs LAN and Physical Connectivity
06:12 - NBMA and Point to MultiPoint Non Broadcast
07:08 - Differences between OSPF Network Types
08:40 - Designated Routers
10:38 - Default Hello Timers and Dead Intervals
11:22 - Automatic Neighbor Discovery
13:48 - Neighbor Adjacency Packet Destination
14:51 - LSA Update Destination IP Address
17:00 - Routing Tables and Next-Hop IP Addresses
20:23 - Summary and Differences Table

=== PRE-REQUISITES ===

LSAs and LSDBs:

Designated Routers and Backup Designated Routers (DR / BDR):

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PracticalNetworking

Busy studying for CCIE EI and I've not found anyone examplaining OSPF the way you do. You have a gift of explaining complex topics in a way that others can understand it.
Thanks and keep up the good work !

stefansteenkamp

Your creativity reflects your experience. Information tables are a gem. Ed, Thank you.

sandravaldez

By far the best teacher I've seen online, you manage to summarise multiple modules into condensed videos that make so much more sense. Cisco really need to employ someone like you to create their content.

matthewchristoforou

wow, it is simply put, my memorization of this topic just eventually vanished because there is no need cause you explained it veryvwell. Thank you sir!

iamjoycheee

Seriously, one of the best all time explanations I have come across. You need to continue making such videos.

sfanike

There were so many little discrepancies I was just unsure of prior to watching your work just as you've described throughout series. Like the songs says " I can see clearly now that the rain has gone".... Thankyou so much Ed between this and Subnetting you are my hero!

xunililak

This is the best video on this topic. I’m amazed at how well you explain the concepts.

gnan

Other instructors try to make it as complicate as possible... To give a sense that they are dealing something very difficult subject. On contrary, you are trying to elucidate the toughest topic in simplest way and words... That even a lay man can understand. Kudos to your efforts. Commendable

ashokreddyb

This is the best and clearest explanations for OSPF series that I can find after a long search. This channel got some other great stuff as well. I joined a member already and didn't regret a bit. Thanks!!

samtang

I was trying to understand serial vs ethernet connections and why one is broadcast and one is point to point, not even ospf related, just in general, and this video helped immensely. excellent video, thank you.

slanduralexander