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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=ZH-CN link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D'>Good point is: it’s hard to make the dns server down<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D'>Bad point is: you have to keep the data be consistent by hand without some automated tools (do we need one for this?) . Oh, you have to do it four times!!!. The resolver may has to ask again to the authoritative server for the glue record which was not put in the additional section since the udp buffer is full.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> dns-operations-bounces@lists.dns-oarc.net [mailto:dns-operations-bounces@lists.dns-oarc.net] <b>On Behalf Of </b>Feng He<br><b>Sent:</b> Tuesday, November 06, 2012 10:13 AM<br><b>To:</b> DNS Operations List<br><b>Subject:</b> [dns-operations] using different DNS providers together<o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt'>Hello,<br><br>One of our customers has been using 4 different providers for his domain DNS:<br><br> Domain servers in listed order:<br> NS1.CLOUDWEBDNS.COM<br> NS2.CLOUDWEBDNS.COM<br> F1G1NS1.DNSPOD.NET<br> F1G1NS2.DNSPOD.NET<br> ELLE.NS.CLOUDFLARE.COM<br> NORM.NS.CLOUDFLARE.COM<br> NS3.CLOUDWEBDNS.COM<br> NS4.CLOUDWEBDNS.COM<br> NS43.DOMAINCONTROL.COM<br> NS44.DOMAINCONTROL.COM<br><br><br>It inclouds godaddy, cloudflare, dnsbed and dnspod.<br>Does this have any hidden problem for resolving?<br><br>Thanks.</span><span lang=EN-US><o:p></o:p></span></p></div></div></body></html>