On Thu, Feb 14, 2019 at 08:51:25PM +0100, Stephane Bortzmeyer <[email protected]> wrote a message of 101 lines which said:
> Otherwise, I suggest to add an error code: Ooops, I forgot one: SERVFAIL Extended DNS Error Code 8 - No reachable authority The resolver could not reach any of the authoritative name servers (or they refused to reply). The R flag should be set. Rationale: in draft -04, all SERVFAIL extended error codes are for DNSSEC issues. In my experience, SERVFAIL happens also (and quite often) for routing issues (most zones have all their authoritative name servers in only one AS, sometimes even one prefix or, worse, one rack). We set the R flag because another resolver may not have the same routing issues, BGP not being consistent between all sites. True, an extended error code could be added after the RFC is published, through "Specification required" but 1) it is easier to do it now 2) it gives to the people who will implement the RFC a wider view of the possible uses. _______________________________________________ DNSOP mailing list [email protected] https://www.ietf.org/mailman/listinfo/dnsop
