Orhan Ergun 9 Comments

BGP Design Case Study

Below BGP design case study is taken from the Orhan Ergun’s CCDE Practical Workbook.In the new version of the workbook there are more than 50 case studies are shared for many technologies.

If you are in the network design field or want to learn about it,don’t miss the book.

Scenario :
Network A is a customer of Network Z, Network B is a peer of Network Z.
Network A becomes transit customer of Network B.
Network A announces aggregate to Network Z and more specific prefixes, and to Network B. Network B sends more specific to its peer Z.
Network Z only announces the aggregate to the world. Network B doesn’t announce anything to the upstream SP.

What is the impact of this design ?
Is there any problem ? If there is , how you can fix ? 

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