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Stable Convergence in Networking: Ensuring Connectivity and Preventing Loops

Learn how to achieve stable convergence to maintain network stability and prevent routing loops in complex network structures.

burton-mcguire
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Stable Convergence in Networking: Ensuring Connectivity and Preventing Loops

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  1. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 0 0 0 0 Initialization 0

  2. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 10 2 0 1 2 2 2 0 10 0 Direct Neighbours 0 2 2

  3. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 11 10 2 3 0 1 2 3 3 2 2 0 10 3 Neighbours of neighbours 0 0 11 2 2

  4. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 11 10 2 3 0 1 2 3 3 13 2 2 0 10 3 Neighbours of neighbours of neighbours 0 13 13 0 11 2 13 2

  5. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 11 10 2 3 0 1 2 3 3 13 2 2 0 10 3 0 Stable convergence 13 13 0 11 2 13 2

  6. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 11 10 2 3 0 1 2 3 3 13 2 2 0 1 10 3 Good news: A new link! 0 13 13 0 11 2 13 2

  7. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 11 10 2 3 0 1 2 3 3 13 2 2 0 1 10 3 0 Direct endpoints know 1 1 0 11 2 13 2

  8. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 3 10 2 3 0 1 2 3 3 3 2 2 0 1 4 3 Neighbours know 0 1 1 0 3 2 3 2

  9. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 3 4 2 3 0 1 2 3 3 3 2 2 0 1 4 3 Neighbours of neighbours know 0 1 1 0 3 2 3 2

  10. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 3 4 2 3 0 1 2 3 3 3 2 2 0 1 4 3 A happy and stable network 0 1 1 0 3 2 3 2

  11. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 3 4 2 3 0 1 2 3 3 3 2 2 0 4 3 Bad news: Link crash!! 0 1 1 0 3 2 3 2

  12. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 3 4 2 3 0 1 2 3 3 3 2 2 0 3 Direct endpoints know 0 0 2 2

  13. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 3 4 2 3 0 1 2 3 3 3 2 2 0 10 3 0 0 2 2

  14. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 3 4 2 3 0 1 2 3 3 3 2 2 0 10 3 Get help from neighbours 0 5 13 0 11 2 13 2

  15. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 7 4 2 3 0 1 2 3 3 7 2 2 0 10 3 Routing loop (due to inconsistent state info) 0 5 13 0 11 2 13 2

  16. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 7 8 2 3 0 1 2 3 3 7 2 2 0 10 3 0 9 13 0 11 2 13 2

  17. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 11 8 2 3 0 1 2 3 3 11 2 2 0 10 3 Counting to infinity… 0 9 13 0 11 2 13 2

  18. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 11 10 2 3 0 1 2 3 3 11 2 2 0 10 3 0 13 13 0 11 2 13 2

  19. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 11 10 2 3 0 1 2 3 3 13 2 2 0 10 3 0 13 13 0 11 2 13 2

  20. A A A A A B B B B B D A C C C C C 1 2 D D D D D E E E E E 2 E 10 2 B C 1 0 11 10 2 3 0 1 2 3 3 13 2 2 0 10 3 Stability again 0 13 13 0 11 2 13 2

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