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<p class="MsoNormal"><span style="font-size:11.0pt">Hi BIND,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Hoping someone in the community will have experience with this.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">We are looking to migrate off a set of nameservers to another set of nameservers. For all practical considerations, both sets of servers are slave to the same hidden master, which yields interesting considerations
that are not part of the “normal” practices in terms of the migration. (Being that “normal” migrations are from one provider to another and require cutting a new set of keys).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I see the steps as:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">1. Add new nameservers to zone NS records. (do not remove old nameservers yet)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">2. Wait at least zone NS TTL. (new servers may not be trusted during this time)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">3. Update registry to add new nameservers & remove old nameservers.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">4. Wait at least registry NS TTL. (old nameservers may not be trusted as cache expires, but new servers will)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">6. Remove NS records for old nameservers from zone.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">The reason for not making the change in one quick pass would presumably be the risk of complete mismatch between the registry NS records and the zone NS records in the event the registry data is cached but
the zone data is not.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Does anyone have any experience that would suggest differently?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thanks in advance,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Mathew Eis<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Northern Arizona University</span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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