On Thu, Aug 14, 2025 Gorry Fairhurst wrote: > I think we need to carefully explain what we mean as "UDP". > > Transport-layer fragmentation is potentially more useful: be it over TCP > or UDP as a Datagram service: as in draft-ietf-tsvwg-udp-options (when > supported). Or when a session-oriented transport works over UDP, as in > QUIC, or we choose TCP. > > ... Obvious: (1) Both client and server need to choose to use this. (2) > Sender has to choose the size.
draft-heard-dnsop-udp-opt-large-dns-responses <https://datatracker.ietf.org/doc/html/draft-heard-dnsop-udp-opt-large-dns-responses> (now expired) describes one way that DNS over UDP could use UDP transport-layer fragmentation implemented via UDP options. Mike Heard
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