On 28 May 2014, at 20:09, Russ Housley <housley@xxxxxxxxxxxx> wrote: >>>> | MUST support IPv4[RFC0791] and IPv6[RFC2460] transport of DNS >>>> | queries and responses. >>>> >>>> This needs an addition: "Some servers in the root name service might not support IPv4, and some might not support IPv6." Without that, some people might think that each server must respond on both layer 3 technologies, but they do not. >>> >>> I would like to see each and every root server support both IPv4 and IPv6. >> >> So would I. But is that a *requirement*, particularly given that the root service seems to run just fine today without it? >> >> I propose that the addition is still needed, despite what you and I would like to see. > > If a root server does not support both IPv4 and IPv6 then it does not comply with the proposed BCP. The current text talks about the service, not individual servers. The service (as provided by thirteen root servers) is available over both IPv6 and IPv4 today, and hence complies with the proposed BCP. Joe