On Tue Jul 22 14:45:13 2014, ctlibin@foxmail.com wrote: <br />
&gt; We have a problem that use dig 9.9 ,the delay is too large. <br />
<br />
Yes, those are very large delays..<br />
<br />
This may not be your problem, but the last time I saw a similar<br />
pattern, it was due to a local recursive server which had no<br />
working outgoing IPv6 route but thought that it did. &nbsp;The long<br />
delays were from trying the servers which had AAAA&nbsp;<br />
records listed over IPv6, timing out, and then falling back to<br />
the IPv4 server addresses.<br />
<br />
Is it possible that that could be a factor in your case?<br />
<br />