OSPF Loop Prevention

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OSPF Loop Prevention

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CCNP Seth

8 жыл бұрын

Пікірлер: 32

@azeyn2050 5 жыл бұрын

This vid is still only one in ospf loop prevention on youtube. Thanks again man!

@ccnpseth4563 5 жыл бұрын

Thabk you Thats why i started my channel

@bog5620 5 жыл бұрын

i don't usually comment but you nailed in 2 minutes. i spent 3 days searching answers on YT and google, to questions like "why is mandatory to connect everything to area 0, why non backbone ABRs are not advertising networks or why ospf behave strange if you don't use the standard area 0 topology" everyone uses the standard to prevent loops. lol but none gives example of loops so people understand this protocol. thanks and good luck.

@martysdomain 2 жыл бұрын

This is a great demonstration of OSPF and virtual links.

@leoxu3620 5 жыл бұрын

from a CCIE view, it is a great video! I guess one thing is SPF will guarantee loop-free in area. then inter-area is done by leaf-spine-leaf topology.

@ccnpseth4563 5 жыл бұрын

Yes, the thing about OSPF is that it relies on area 0 as a transit area. Basically, if you are not Area 0 and a router is not routing you through area 0, then you cannot go through that area.

@justmeva 11 ай бұрын

It was a bit long, but it was loaded with a ton of information - thank you.

@humayunakhtar2116 4 жыл бұрын

For the first time ever i'm ale to get this topic . Thank you very much

@MrAbapper 4 жыл бұрын

"Abrs will accept and use type 3 lsas learned from non backbone areas if it does not have a full adjacency with area 0"? What u mean? Third slide, u just said abrs will not use lsas from R3 because R3 doesnt have full adjency to area 0????

@grahammccann8554 2 жыл бұрын

Hi CCNP Seth, Thank you for taking the time to make this video

@heribertorios 2 жыл бұрын

In addition to virtual links you can use Gre tunnels to connect R3 to Backbone area. Try it just for fun. Thanks for the video. very good explanation.

@jeremyxia3595 2 жыл бұрын

Really good content, helped me to review these topics

@DaughterOfRnbSoul 7 жыл бұрын

Hey man thanks a lot ! I just recently passed the ICND1, and I knew how ripv2 avoids loops using split horizon and how EIGRP avoids loops but I never really understood how OSPF avoids loops :O

@ccnpseth4563 7 жыл бұрын

DaughterOfRnbSoul you are welcome, it was a mystery to me as well but then I found it so I decided to share it

@kosmonautofficial296 2 жыл бұрын

Interesting video thanks!

@ahmedmagdy1118 5 жыл бұрын

Thanks a lot for this informative video, I was confused before watching that video. Thanks again :)

@MissFatalKisses 7 жыл бұрын

Thanks for this! I've been looking for a good explanation of OSPF loop prevention =)

@ccnpseth4563 7 жыл бұрын

MissFatalKisses you're welcome.

@kashifrana6798 6 жыл бұрын

Great explanation !

@ashay710 6 жыл бұрын

As we can see R1 learns about 5.5.5.5 from R3 but i guess its not using that info for path selection as it has a lover sequence number

@tayoskeeper 4 жыл бұрын

Nice video! You must be CCIE nowadays, for sure 👌🏻

@georgesmith3022 2 жыл бұрын

So just adding a loopback to area 0 makes the router ABR?

@ajeyganesh7843 Жыл бұрын

very helpful :)

@sp3ktr3 4 жыл бұрын

What If: area 1 is a loop that connects to two Different area 0 ABRs and then you have a dropped area 1 link that splits area 1 in two. How do you prevent dropped traffic between the two halves of area 1.

@ccnpseth4563 4 жыл бұрын

So you can have multiple areas w the same number, the concept is that routes from an area must transit area 0 to get to another area regardless of the number, even if area 1 is split

@sp3ktr3 4 жыл бұрын

In my experience it breaks the Routing. At least with route summarization. The fix for me is two gave two links between the ABRs, one as part of area 0, and the other as the other area.