topic Re: loops scenarios in ospf in Routing and SD-WAN

loops scenarios in ospf

rocky2024 — Mon, 26 Dec 2022 07:09:15 GMT

Hello,

I am trying to locate OSPF loops case studies, how they occur in the network ?

i can see many post about how to prevent it but I want to read more how loops occur in the network?

please help me

Re: loops scenarios in ospf

rocky2024 — Mon, 26 Dec 2022 08:07:34 GMT

going though below doc. very informative

https://cdn2.hubspot.net/hubfs/3985396/Blog/Loop-Prevention-in-OSPF.pdf

Re: loops scenarios in ospf

MHM Cisco World — Mon, 26 Dec 2022 09:04:37 GMT

do you run lab for ospf loop ?

Re: loops scenarios in ospf

balaji.bandi — Mon, 26 Dec 2022 09:47:28 GMT

The document INE produced good document for reference. - have used for my Lab purpose when I was giving Lab.

Cisco has good document (quite old but good to read - if you starting the initial level of understanding OSPF)

https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/7039-1.html#t5

The major case you see where the Loop occurs were when you redistribute between IGP, and also loop in the network design. ( you can eliminate using ACL to block - so loop can avoid)

in the case of BGP that will be taken care of intelligently.