Commit 549ae801 authored by Mark Andrews's avatar Mark Andrews

How do change the nameservers for a zone?

parent b6ba2af5
......@@ -17,7 +17,7 @@
- PERFORMANCE OF THIS SOFTWARE.
-->
<!-- $Id: FAQ.xml,v 1.39 2008/05/31 01:44:13 marka Exp $ -->
<!-- $Id: FAQ.xml,v 1.40 2008/07/17 00:00:34 marka Exp $ -->
<article class="faq">
<title>Frequently Asked Questions about BIND 9</title>
......@@ -664,6 +664,66 @@ zone "list.dsbl.org" {
</qandadiv> <!-- Configuration and Setup Questions -->
<qandadiv><title>Operations Questions</title>
<qandaentry>
<question>
<para>
How do change the nameservers for a zone?
</para>
</question>
<answer>
<para>
Step 1: Ensure all nameservers, new and old, are serving the
same zone content.
</para>
<para>
Step 2: Work out the maximum TTL of the NS RRset in the parent and child
zones. This is the time it will take caches to be clear of a
particular version of the NS RRset.
If you are just removing nameservers you can skip to Step 6.
</para>
<para>
Step 3: Add new nameservers to the NS RRset for the zone and
wait until all the servers for the zone are answering with this
new NS RRset.
</para>
<para>
Step 4: Inform the parent zone of the new NS RRset then wait for all the
parent servers to be answering with the new NS RRset.
</para>
<para>
Step 5: Wait for cache to be clear of the old NS RRset.
See Step 2 for how long.
If you are just adding nameservers you are done.
</para>
<para>
Step 6: Remove any old nameservers from the zones NS RRset and
wait for all the servers for the zone to be serving the new NS RRset.
</para>
<para>
Step 7: Inform the parent zone of the new NS RRset then wait for all the
parent servers to be answering with the new NS RRset.
</para>
<para>
Step 8: Wait for cache to be clear of the old NS RRset.
See Step 2 for how long.
</para>
<para>
Step 9: Turn off the old nameservers or remove the zone entry from
the configuration of the old nameservers.
</para>
<para>
Step 10: Increment the serial number and wait for the change to
be visible in all nameservers for the zone. This ensures that
zone transfers are still working after the old servers are
decommision.
</para>
</answer>
</qandaentry>
</qandadiv> <!-- Operations Questions -->
<qandadiv><title>General Questions</title>
<qandaentry>
......
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