ATR: Additional Truncation Response for Large DNS Response

Document Type Expired Internet-Draft (candidate for dnsop WG)
Last updated 2019-02-14 (latest revision 2018-08-02)
Stream IETF
Intended RFC status (None)
Expired & archived
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Stream WG state Call For Adoption By WG Issued
Polled for WG adoption but not adopted
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IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


As the increasing use of DNSSEC and IPv6, there are more public evidence and concerns on IPv6 fragmentation issues due to larger DNS payloads over IPv6. This memo introduces an simple improvement on DNS server by replying an additional truncated response just after the normal fragmented response. It can be used to relieve users suffering on DNS latency and failures due to large DNS response. An ATR Experiment was done to show how well it works and some operational issues are discussed in this memo as well.


Linjian Song (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)