What Is the Reason That You Want to Synchronize IGP

question 4

Multiple Choice

What is the reason that you want to synchronize IGP and BGP convergence by advertising an infinite metric in OSPF or setting the overload bit in IS-IS?

• A) to prevent traffic loss when the path from a router to a BGP next hop traverses another router that has not yet learned the path via BGP
• B) to prevent churning between multiple available routes reachable through IGP and BGP
• C) to prevent BGP from converging faster than IGP, which can cause temporary routing loops in the network
• D) to prevent routes which are learned both from IGP and BGP from forming a routing loop

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