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</o:shapelayout></xml><![endif]--></head><body lang=ZH-CN link="#0563C1" vlink="#954F72" style='text-justify-trim:punctuation'><div class=WordSection1><p><span lang=EN-US style='font-family:"Calibri",sans-serif'>Hi folks,<o:p></o:p></span></p><p><span lang=EN-US style='font-family:"Calibri",sans-serif'>I am doing a test on priming exchange from different DNS software¡¯s and find something weird. BIND(v9.8.1, v9.9.4, v9.10.1 ) would send NS query and a query simultaneously rather than wait until NS query get answered.</span><span lang=EN-US> </span><span lang=EN-US style='font-family:"Calibri",sans-serif'>PowerDNS(v3.3) will not do any</span><span lang=EN-US> </span><span lang=EN-US style='font-family:"Calibri",sans-serif'>NS query but query base on the content in hint file when root-hint is configured. Does anyone know any consideration or risk of these implementation?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt'>Regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt'>Davey<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>------------------------<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Davey Song </span><span style='font-family:ËÎÌå'>ËÎÁÖ½¡</span><span lang=EN-US><br>Technical Manager <br>BII Group<br>Telephone: 86+13810106659<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>