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Slow retries after timeouts

Measurements from Neustar/UltraDNS for some DNS servers including BIND9,They think there is weird behavior:

https://ripe85.ripe.net/wp-content/uploads/presentations/96-dknight-fewnsmanyips-ripe85-dnswg.pdf Page 8

Video: https://ripe85.ripe.net/archive/video/dave-knight_fewer-name-servers-more-addresses_main-20221027-112204.mp4 time 7:17 onwards

Measurements from Neustar/UltraDNS for some DNS servers including BIND9

  • Bind Strongly prefers IPv6 - they think there is weird behavior.
  • If one address is broken, penalize all higher numbered addresses until piling onto the last one?
  • Slow to get an answer when retrying
Edited by Petr Špaček
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