Hi all, <div><br></div><div>Im trying to troubleshoot and find out the reason why some of our DNS lookup take a long time :</div><div><br></div><div><br></div><div><div>ns-dev ~ # rndc flushname <a href="http://www.paypal.com">www.paypal.com</a> ; dig <a href="http://www.paypal.com">www.paypal.com</a> @localhost</div>
<div><br></div><div>; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5_4.2 <<>> <a href="http://www.paypal.com">www.paypal.com</a> @localhost</div><div>;; global options: printcmd</div><div>;; Got answer:</div>
<div>;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29297</div><div>;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 3, ADDITIONAL: 2</div><div><br></div><div>;; QUESTION SECTION:</div><div>;<a href="http://www.paypal.com">www.paypal.com</a>. IN A</div>
<div><br></div><div>;; ANSWER SECTION:</div><div><a href="http://www.paypal.com">www.paypal.com</a>. 300 IN A 64.4.241.33</div><div><a href="http://www.paypal.com">www.paypal.com</a>. 300 IN A 64.4.241.49</div>
<div><a href="http://www.paypal.com">www.paypal.com</a>. 300 IN A 66.211.169.2</div><div><a href="http://www.paypal.com">www.paypal.com</a>. 300 IN A 66.211.169.65</div><div><br>
</div><div>;; AUTHORITY SECTION:</div><div><a href="http://paypal.com">paypal.com</a>. 252 IN NS <a href="http://ns2.isc-sns.com">ns2.isc-sns.com</a>.</div><div><a href="http://paypal.com">paypal.com</a>. 252 IN NS <a href="http://ns3.isc-sns.info">ns3.isc-sns.info</a>.</div>
<div><a href="http://paypal.com">paypal.com</a>. 252 IN NS <a href="http://ns1.isc-sns.net">ns1.isc-sns.net</a>.</div><div><br></div><div>;; ADDITIONAL SECTION:</div><div><a href="http://ns3.isc-sns.info">ns3.isc-sns.info</a>. 3559 IN A 63.243.194.1</div>
<div><a href="http://ns3.isc-sns.info">ns3.isc-sns.info</a>. 86352 IN AAAA 2001:5a0:10::1</div><div><br></div><div>;; Query time: 5119 msec</div><div>;; SERVER: 127.0.0.1#53(127.0.0.1)</div><div>;; WHEN: Fri Nov 26 12:05:49 2010</div>
<div>;; MSG SIZE rcvd: 225</div></div><div><br></div><div>Doing trace : </div><div><br></div><div><div>; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5_4.2 <<>> <a href="http://www.paypal.com">www.paypal.com</a> @localhost +trace</div>
<div>;; global options: printcmd</div><div>. 516870 IN NS <a href="http://i.root-servers.net">i.root-servers.net</a>.</div><div>. 516870 IN NS <a href="http://j.root-servers.net">j.root-servers.net</a>.</div>
<div>. 516870 IN NS <a href="http://k.root-servers.net">k.root-servers.net</a>.</div><div>. 516870 IN NS <a href="http://l.root-servers.net">l.root-servers.net</a>.</div>
<div>. 516870 IN NS <a href="http://m.root-servers.net">m.root-servers.net</a>.</div><div>. 516870 IN NS <a href="http://a.root-servers.net">a.root-servers.net</a>.</div>
<div>. 516870 IN NS <a href="http://b.root-servers.net">b.root-servers.net</a>.</div><div>. 516870 IN NS <a href="http://c.root-servers.net">c.root-servers.net</a>.</div>
<div>. 516870 IN NS <a href="http://d.root-servers.net">d.root-servers.net</a>.</div><div>. 516870 IN NS <a href="http://e.root-servers.net">e.root-servers.net</a>.</div>
<div>. 516870 IN NS <a href="http://f.root-servers.net">f.root-servers.net</a>.</div><div>. 516870 IN NS <a href="http://g.root-servers.net">g.root-servers.net</a>.</div>
<div>. 516870 IN NS <a href="http://h.root-servers.net">h.root-servers.net</a>.</div><div>;; Received 492 bytes from 127.0.0.1#53(127.0.0.1) in 2 ms</div><div><br></div><div>com. 172800 IN NS <a href="http://b.gtld-servers.net">b.gtld-servers.net</a>.</div>
<div>com. 172800 IN NS <a href="http://h.gtld-servers.net">h.gtld-servers.net</a>.</div><div>com. 172800 IN NS <a href="http://f.gtld-servers.net">f.gtld-servers.net</a>.</div>
<div>com. 172800 IN NS <a href="http://m.gtld-servers.net">m.gtld-servers.net</a>.</div><div>com. 172800 IN NS <a href="http://c.gtld-servers.net">c.gtld-servers.net</a>.</div>
<div>com. 172800 IN NS <a href="http://e.gtld-servers.net">e.gtld-servers.net</a>.</div><div>com. 172800 IN NS <a href="http://d.gtld-servers.net">d.gtld-servers.net</a>.</div>
<div>com. 172800 IN NS <a href="http://a.gtld-servers.net">a.gtld-servers.net</a>.</div><div>com. 172800 IN NS <a href="http://g.gtld-servers.net">g.gtld-servers.net</a>.</div>
<div>com. 172800 IN NS <a href="http://l.gtld-servers.net">l.gtld-servers.net</a>.</div><div>com. 172800 IN NS <a href="http://j.gtld-servers.net">j.gtld-servers.net</a>.</div>
<div>com. 172800 IN NS <a href="http://i.gtld-servers.net">i.gtld-servers.net</a>.</div><div>com. 172800 IN NS <a href="http://k.gtld-servers.net">k.gtld-servers.net</a>.</div>
<div>;; Received 504 bytes from 192.36.148.17#53(<a href="http://i.root-servers.net">i.root-servers.net</a>) in 57 ms</div><div><br></div><div><a href="http://paypal.com">paypal.com</a>. 172800 IN NS <a href="http://ns1.isc-sns.net">ns1.isc-sns.net</a>.</div>
<div><a href="http://paypal.com">paypal.com</a>. 172800 IN NS <a href="http://ns2.isc-sns.com">ns2.isc-sns.com</a>.</div><div><a href="http://paypal.com">paypal.com</a>. 172800 IN NS <a href="http://ns3.isc-sns.info">ns3.isc-sns.info</a>.</div>
<div>;; Received 177 bytes from 192.33.14.30#53(<a href="http://b.gtld-servers.net">b.gtld-servers.net</a>) in 5498 ms</div><div><br></div><div><a href="http://www.paypal.com">www.paypal.com</a>. 300 IN A 66.211.169.65</div>
<div><a href="http://www.paypal.com">www.paypal.com</a>. 300 IN A 64.4.241.33</div><div><a href="http://www.paypal.com">www.paypal.com</a>. 300 IN A 64.4.241.49</div><div><a href="http://www.paypal.com">www.paypal.com</a>. 300 IN A 66.211.169.2</div>
<div><a href="http://paypal.com">paypal.com</a>. 300 IN NS <a href="http://ns3.isc-sns.info">ns3.isc-sns.info</a>.</div><div><a href="http://paypal.com">paypal.com</a>. 300 IN NS <a href="http://ns1.isc-sns.net">ns1.isc-sns.net</a>.</div>
<div><a href="http://paypal.com">paypal.com</a>. 300 IN NS <a href="http://ns2.isc-sns.com">ns2.isc-sns.com</a>.</div><div>;; Received 285 bytes from 72.52.71.1#53(<a href="http://ns1.isc-sns.net">ns1.isc-sns.net</a>) in 174 ms</div>
</div><div><br></div><div><br></div><div><br></div><div>Version of bind installed : bind-9.3.6-4.P1.el5_4.2</div><div>IPv6 has been disabled on the host and firewall turned off during the test. </div><div><br></div><div>Any toughts ? </div>
<div><br></div><div>Regards,</div><div><br></div><div>Rianto </div><div><br></div><div><br></div><div><br></div><div><br></div>