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There is an explanation given to the above question on this link but I am not understanding that how it will create a loop. I would appreciate if someone can explain this with the help of diagrams of an OSPF network. http://www.networkworld.com/article/2348778/cisco-subnet/my-favorite-interview-question.html

marked as duplicate by Mike Pennington, Brett Lykins, Teun Vink, Ricky Beam, Sebastian Wiesinger May 12 '15 at 15:11

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  • Please do not post the same question on mutliple SE sites. – Teun Vink May 10 '15 at 22:10
  • The OSPF protocol was designed that way. That's it. It is actually difficult to create a routing loop in OSPF or EIGRP as their default state (along with admin distances, etc) is to avoid this. It is doable however if you try really hard to do that. – Ron Royston May 10 '15 at 22:10

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