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Merge branch '3710-properly-document-DF-flag-on-outbound-UDP' into 'main'

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Clarify the documentation about DF-flag

Closes #3710

See merge request isc-projects/bind9!7770
This commit is contained in:
Ondřej Surý 2023-04-03 10:28:47 +00:00
commit 4c7e773a31
2 changed files with 5 additions and 3 deletions
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3
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@ -1,3 +1,6 @@
6138. [doc] Fix the DF-flag documentation on the outgoing
UDP packets. [GL #3710]
6137. [cleanup] Remove the trampoline jump when spawning threads.
[GL !7293]

5
doc/arm/reference.rst
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@ -4349,9 +4349,8 @@ Tuning
dropping patterns, the query is retried over TCP. Per-server EDNS statistics
are only retained in memory for the lifetime of a given server's ADB entry.
The :iscman:`named` now sets the DON'T FRAGMENT flag on outgoing UDP packets.
According to the measurements done by multiple parties this should not be
causing any operational problems as most of the Internet "core" is able to
According to the measurements done by multiple parties the default value
should not be causing the fragmentation as most of the Internet "core" is able to
cope with IP message sizes between 1400-1500 bytes, the 1232 size was picked
as a conservative minimal number that could be changed by the DNS operator to
a estimated path MTU minus the estimated header space. In practice, the