<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On 24 October 2016 at 18:35, Paul Vixie <span dir="ltr"><<a href="mailto:paul@redbarn.org" target="_blank">paul@redbarn.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><br></span>the current TTL is 32 bits unsigned, and i'd be very happy to see it<br>
split into two 16-bit unsigned quantities. TTL longer than 65535 is<br>
hardly ever operable.<br><br></blockquote><div>65535 seconds is nowhere near long enough. Typical TTLs for many record types in many zones are 1 or 2 days. You need at least 18 bits to get that.</div><div><br></div><div>As far as I'm aware, implementations that set a maximum acceptable TTL default to 1 day, which requires at least 17 bits.</div><div><br></div></div><br></div></div>