On Fri, 1 Sep 2017 17:04:53 -0300 Eduardo Schoedler via Unbound-users <[email protected]> wrote:
> And for IPv6 header? On general Ethernet, 1452 = 1500-40-8 However, some people who do not believe PMTUD are using 1280 as minimum MTU. So, 1232 = 1280-40-8 will be more safety. But I do not want use EDNS0. It is very wastefull for other than DNSSEC user. I want to enable DO bit. Can I do with Unbound? (However I know it's "MUST" by RFC.) > 2017-09-01 11:46 GMT-03:00 T.Suzuki via Unbound-users > <[email protected]>: > > unbound.conf > > # EDNS reassembly buffer to advertise to UDP peers (the actual buffer > > # is set with msg-buffer-size). 1480 can solve fragmentation (timeouts) > > edns-buffer-size: > > > > Why does this comment recommend > > 1480 = 1500 - 20 ? (UDP datagram size over IPv4) > > > > Why is this value not to become > > 1472 = 1500 - 20 - 8 ? (UDP payload size over IPv4) > > > > Or, Is this a value of another meaning? > > > > (I verified that the edns-buffer-size is used for udp payload size of > > EDNS0.) > > > > -- > > ------------------------------------------------------------------------------ > > T.Suzuki > > > > -- > Eduardo Schoedler > -- ------------------------------------------------------------------------------ T.Suzuki
