>This is true. Including the Client IP in constructing the Client Cookie >was intended to deal with this, but this operation is impractical with >UDP; expensive at best and not suitable for high volume recursive to >authoritative traffic. > >We could recommend it for stub to recursive traffic, for which the high >volume performance requirements are less of an issue... what do you think?
Maybe high volume should be the exception. I think it is better to specify that all code should include the Client IP unless explicitly configured to leave it out. A bit of testing suggests that a naive way of getting the Client IP takes about 2 microseconds on modern hardware. So a bit of caching on high performance resolvers would be enough. _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
