On 2009-05-15 05:40, Dave Thaler wrote: > I read and I agree with the document except for Appendix A. > > For one, I disagree that v4 mapped addresses are not recommended. > They're commonly used for sockets that support both IPv4 and IPv6. > > Secondly, ISATAP (RFC5214) and IPv4-translated (RFC2765) addresses > are not mentioned and they also use the decimal form in the low 32 bits. > > I would recommend moving up into the body of the doc a discussion > of the ambiguity between, for example > ::ffff:127.0.0.1 > ::ffff:7f00:1
Yes. There is a technical ambiguity in RFC4379 caused by this. http://www.rfc-editor.org/errata_search.php?eid=1418 (You can argue that the suggested fix is sloppy too, but at least it isn't ambiguous. If we agree here, I can ask the RFC Editor to update the fix.) > > And explicitly recommend that forms for which dotted decimal is > legal should always be displayed with dotted decimal rather than > hex. On 2009-05-15 06:58, Dave Thaler wrote: > I'll note that the netstat output below is arguably non-standard since it > includes > port numbers without encosing the address in []. > (The arguable part is whether [] is limited to URLs or applies in general) As far as I know it's defined for URIs in RFC3986 and SIP in RFC3261. > > Windows would display them as [::]:22 etc. > > Perhaps this draft should be extended to cover text representation > of IPv6 addresses + ports, and discuss this issue? The combination of RFC3261 and draft-ietf-sip-ipv6-abnf-fix is supposed to combine the RFC4291 syntax, the RFC3986 square brackets, and :port, such that [::]:22 would indeed be the result, whereas 127.0.0.1:22 would be the result for IPv4. http://[2001:4860:b003::68]:80 works fine with Firefox and IE. I agree that it would be reasonable to recommend this as best practice. Brian -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
