David Hill <dhill@mindcry.org> wrote:

> This diff adds DSCP EF for ipv6 ntp packets, and switches ipv4 to it
> as well.  This also matches
> https://github.com/ntp-project/ntp/blob/8a37f9b66d374b164531f0189caba4cbfd68bb61/ntpd/ntp_io.c#L79

I don't actually believe this is a good idea.

If other services on a path abuse the EF tag, that could lead to packets
being dropped by a router.  And could have more negative impacts upon
ntp communication than the positive effects being theorized (which I
suspect are marginal).  I do not think ntp traffic, in particular
relating to openntpd on openbsd machines, are sensitive enough to be
improved by this tweak, but are more likely harmed by traffic losses.