[DNSOP] draft-ietf-dnsop-avoid-fragmentation-04.txt

Dear DNSOP WG,

Paul Vixue and I submitted draft-ietf-dnsop-avoid-fragmentation-04.txt .

  https://datatracker.ietf.org/doc/draft-ietf-dnsop-avoid-fragmentation/
  https://tools.ietf.org/html/draft-ietf-dnsop-avoid-fragmentation-04

We changed to use "default maximum DNS/UDP payload size" instead of
"default path MTU value".

Please review current version and choose good "Default Maximum DNS/UDP
payload size".

  Default maximum DNS/UDP payload size for IPv6 is XXXX.
  (Choose 1232, 1400, 1472 or other good values before/at WGLC)

  Default maximum DNS/UDP payload size for IPv4 is XXXX.
  (Choose 1232, 1400, 1452 or other good values before/at WGLC)

Regards,

--
Kazunori Fujiwara, JPRS <fujiwara@jprs.co.jp>

> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the Domain Name System Operations WG of the IETF.
> 
>         Title           : Fragmentation Avoidance in DNS
>         Authors         : Kazunori Fujiwara
>                           Paul Vixie
> 	Filename        : draft-ietf-dnsop-avoid-fragmentation-04.txt
> 	Pages           : 11
> 	Date            : 2021-02-22
> 
> Abstract:
>    EDNS0 enables a DNS server to send large responses using UDP and is
>    widely deployed.  Path MTU discovery remains widely undeployed due to
>    security issues, and IP fragmentation has exposed weaknesses in
>    application protocols.  Currently, DNS is known to be the largest
>    user of IP fragmentation.  It is possible to avoid IP fragmentation
>    in DNS by limiting response size where possible, and signaling the
>    need to upgrade from UDP to TCP transport where necessary.  This
>    document proposes to avoid IP fragmentation in DNS.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-dnsop-avoid-fragmentation/
> 
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-dnsop-avoid-fragmentation-04
> https://datatracker.ietf.org/doc/html/draft-ietf-dnsop-avoid-fragmentation-04
> 
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-dnsop-avoid-fragmentation-04
> 
> 
> Please note that it may take a couple of minutes from the time of submission
> until the htmlized version and diff are available at tools.ietf.org.
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
> 
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