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<p class="MsoNormal">Hi<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">As per RFC 6604, section 3<o:p></o:p></p>
<p class="MsoNormal" style="page-break-before:always"><span lang="EN" style="font-size:12.0pt;font-family:"Courier New""> When an xNAME chain is followed, all but the last query cycle<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span lang="EN" style="font-size:12.0pt;font-family:"Courier New""> necessarily had no error. The RCODE in the ultimate DNS response<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span lang="EN" style="font-size:12.0pt;font-family:"Courier New""> MUST BE set based on the final query cycle leading to that<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span lang="EN" style="font-size:12.0pt;font-family:"Courier New""> response. If the xNAME chain was terminated by an error, it will<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span lang="EN" style="font-size:12.0pt;font-family:"Courier New""> be that error code. If the xNAME chain terminated without error,<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span lang="EN" style="font-size:12.0pt;font-family:"Times New Roman",serif"> </span><span lang="EN" style="font-size:12.0pt;font-family:"Courier New"">it will be zero.<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span lang="EN" style="font-size:12.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span lang="EN" style="font-size:12.0pt;font-family:"Courier New"">This is a little vague on two accounts:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;page-break-before:always;mso-list:l0 level1 lfo1">
<![if !supportLists]><span lang="EN" style="font-size:12.0pt;font-family:"Courier New""><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN" style="font-size:12.0pt;font-family:"Courier New"">What would be the error code if the server decides to curtail the CNAME chain after a certain length (say 20). Is it still success or do we indicate in some other
way.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;page-break-before:always;mso-list:l0 level1 lfo1">
<![if !supportLists]><span lang="EN" style="font-size:12.0pt;font-family:"Courier New""><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN" style="font-size:12.0pt;font-family:"Courier New"">If the CNAME chain points to a Qname for which the auth server is non-authoritative (and recursion is disabled on the auth server.) The server in this case cannot
get the response. A direct query for this Qname will result in SERV_FAIL. Should the auth server return SERV_FAIL in this case? Will resolvers respect answers with SERV_FAIL in RCODE and cache the partial response?<o:p></o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span lang="EN" style="font-size:12.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span lang="EN" style="font-size:12.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal" style="page-break-before:always"><span lang="EN" style="font-size:12.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal">[ I have asked the same in IETF groups as well ]<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks<o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Segoe UI",sans-serif;color:#0070C0">Ashu<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Segoe UI",sans-serif;color:#0070C0">Program Manager | Windows Networking| DNS & SDN<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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