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IPv6 Fragmentation and the DNS
Manage episode 394574786 series 3001389
Content provided by APNIC. All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by APNIC or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://ppacc.player.fm/legal.
In this episode of PING, APNIC’s Chief Scientist Geoff Huston discusses the change in IP packet fragmentation behaviour adopted by IPv6, and the implications of a change in IETF “Normative Language” regarding use of IPv6 in the DNS.
IPv4 arguably succeeds over so many variant underlying links and networks because it’s highly adaptable to fragmentation in the path. IPv6 has a proscriptive requirement that only the end hosts fragment, which limits how intermediate systems can handle IPv6 data in flight. In the DNS, increasing complexity from things like DNSSEC mean the the DNS packet sizes are getting larger and larger, which risks invoking the IPv6 fragmentation behaviour in UDP. This has consequences for the reliability and timeliness of the DNS service.
For this reason, a revision of the IETF normative language (the use of capitalised MUST MAY SHOULD and MUST NOT) directing how IPv6 integrates into the DNS service in deployment has risks. Geoff argues for a “first, do no harm” approach to this kind of IETF document.
Read more about IPv6, Fragmentation, the DNS and Geoff’s measurements on the APNIC Blog and APNIC Labs:
86 episodes
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Manage episode 394574786 series 3001389
Content provided by APNIC. All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by APNIC or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://ppacc.player.fm/legal.
In this episode of PING, APNIC’s Chief Scientist Geoff Huston discusses the change in IP packet fragmentation behaviour adopted by IPv6, and the implications of a change in IETF “Normative Language” regarding use of IPv6 in the DNS.
IPv4 arguably succeeds over so many variant underlying links and networks because it’s highly adaptable to fragmentation in the path. IPv6 has a proscriptive requirement that only the end hosts fragment, which limits how intermediate systems can handle IPv6 data in flight. In the DNS, increasing complexity from things like DNSSEC mean the the DNS packet sizes are getting larger and larger, which risks invoking the IPv6 fragmentation behaviour in UDP. This has consequences for the reliability and timeliness of the DNS service.
For this reason, a revision of the IETF normative language (the use of capitalised MUST MAY SHOULD and MUST NOT) directing how IPv6 integrates into the DNS service in deployment has risks. Geoff argues for a “first, do no harm” approach to this kind of IETF document.
Read more about IPv6, Fragmentation, the DNS and Geoff’s measurements on the APNIC Blog and APNIC Labs:
86 episodes
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Similar to PING
Babbage is our weekly podcast on science and technology, named after Charles Babbage—a 19th-century polymath and grandfather of computing. Host Alok Jha talks to our correspondents about the innovations, discoveries and gadgetry shaping the world. Published every Wednesday. If you’re already a subscriber to The Economist, you’ll have full access to all our shows as part of your subscription. For more information about Economist Podcasts+, including how to get access, please visit our FAQs pa ...
…
continue reading
Risky Business is a weekly information security podcast featuring news and in-depth interviews with industry luminaries. Launched in February 2007, Risky Business is a must-listen digest for information security pros. With a running time of approximately 50-60 minutes, Risky Business is pacy; a security podcast without the waffle.
…
continue reading
Technical interviews about software topics.
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continue reading
Windows Weekly is about more than Windows. Veteran Microsoft insiders Paul Thurrott and Richard Campbell join Leo for a deep dive into the most valuable company in the world. From consumer to enterprise, AI to Xbox, Windows Weekly is the only Microsoft podcast you'll ever need. Records live every Wednesday at 2:00pm Eastern / 11:00am Pacific / 18:00 UTC.
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continue reading
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