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Routing Table Growth: Navigating the Internet Maze

Explore the rapid growth of routing tables, the impact on network infrastructure, and strategies to manage the escalating number of prefixes. Discover how to optimize routing efficiency and address challenges in the digital landscape.

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Routing Table Growth: Navigating the Internet Maze

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  1. Routing Table Growth Colin Whittaker colin@magnet.ie

  2. Agenda • How Deep is the Hole we are in • Lets stop digging • Do you really care about …

  3. Agenda • How Deep is the Hole we are in • Lets stop digging • Do you really care about …

  4. How Deep is the Hole? • Full table now >210k prefixes • Does not look likely to slow down • Update rate growing even faster • Most of the routing table is redundant • Many platforms running out of FIB space or CPU for updates

  5. Show me the Graphs

  6. Agenda • How Deep is the Hole we are in • Lets stop digging • Do you really care about …

  7. Lets Stop Digging • Discourage Peers from disaggregating • Use communities to control radius of pollution • Start filtering on RIR minimum allocation boundaries • I see 140k table with RIR minimums and a /23 allow all

  8. Agenda • How Deep is the Hole we are in • Lets stop digging • Do you really care about …

  9. Do you really care … • about some random /24 on the other side of the world • Partial table plus default route is good enough in many cases

  10. Questions ?

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