What would make sense, and what not? What has already been tried?
In my DNSxL draft, soon to be an RFC we hope, I say that it's nibble
reversed hex, the same as v6 rDNS.
Besides the bandwidth argument (is this a valid argument?)
I don't think so. Reversed-nibble takes 64 bytes of DNS packet
contents (alternating length bytes and nibble-in-ASCII-hex bytes); I
don't consider this large enough to be an issue, especially since it
will normally occur only once per packet, even if multiple records are
returned, thanks to name compression.
Quite right. Any normal v6 query or response should fit in a 512 byte
packet, and that's all that matters.
R's,
John
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