How does ospf control flooding?

Posted by iamrohitbanga on Server Fault See other posts from Server Fault or by iamrohitbanga
Published on 2010-05-05T18:41:09Z Indexed on 2010/05/06 5:28 UTC
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What method is used by ospf protocol to prevent looping of flooded packets for link state advertisements? The packet header does not contain any timestamp. How do the routers recognize that it is the same advertisement that they sent before?

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