There is this thing called &#x27;IPv6 jumbograms&#x27;.<p><a href="https:&#x2F;&#x2F;tools.ietf.org&#x2F;html&#x2F;rfc2147" rel="nofollow">https:&#x2F;&#x2F;tools.ietf.org&#x2F;html&#x2F;rfc2147</a><p>(Good luck with that over the public internet, but it is possible to make udp packets larger than 64K)