Viktor Dukhovni <[email protected]> wrote: > What I haven't seen reported is measurements of problems that occur when > the EDNS(0) UDP buffer size is *too small*.
A full service resolver should not have a fixed buffer size but instead probe for what works. They pretty much already do so. There remains some question about what their upper limit should be; it seems reasonable to me to grow up to a 1500 octet MTU but no bigger. Stub resolvers should do the same if they have enough brain to do so :-) The tricky balance is the UDP response size limit on the auth side, which can't be adaptive, and probably needs to be a bit more pessimistic than a 1500 octet MTU. Tony. -- f.anthony.n.finch <[email protected]> http://dotat.at/ Irish Sea: South or southwest 6 to gale 8, occasionally 5 later. Moderate or rough. Rain or drizzle. Good, occasionally poor. _______________________________________________ dns-operations mailing list [email protected] https://lists.dns-oarc.net/mailman/listinfo/dns-operations
