There has been some discussion of late about DNS MTU sizing and EDNS0 "fall-back". I've found another "culprit" in the program DNSMASQ - distributed with FedoraCore 10 and later versions of RedHat.
to wit: -P, --edns-packet-max=<size> Specify the largest EDNS.0 UDP packet which is supported by the DNS for- warder. Defaults to 1280, which is the RFC2671-recommended maximum for eth- ernet. Is there any interest in revisting this RFC or should we be happy with a functional limit on EDNS0 message size being 1280 bytes? --bill _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop