Red Hat Bugzilla – Bug 172093
2 sec Delay before querying root servers
Last modified: 2007-11-30 17:07:21 EST
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Description of problem:
There is a 2sec delay between querying the nameserver and its query of the root server if it's not in dns cache.
It seems to be the same problem as described here:
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. do in console: host dell.com
2. wait minimum of 2 seconds
3. get the answer
Actual Results: I used tethereal to debug:
the question reaches the dns server,
it waits exactly 2 seconds, then queries the root servers/authoritative servers of the requested domain
Expected Results: Immediate response
It seems to be a problem with ipv6, bind is compiled with ipv6 support but does not notice it runs without it?
Actually it seems to be this problem
<http://v6fix.net/db/bind9-ipv6-transport.html> which is fixed in 9.2.5 or
9.3.1. Maybe the fix can be backported from 9.2.5?
Yes, the fix for this problem has been backported into the next version of BIND
for RHEL-4: bind-9.2.4-12_EL4, which should be in a RHEL update release soon,
but which meanwhile can be downloaded from :
*** This bug has been marked as a duplicate of 167188 ***
I'm also having this problem.
I tried to get the updated version you mentioned, but the directories under
http://people.redhat.com/~jvdias/bind/RHEL-4/9.2.4-12_EL4/ are all empty.
Is http://people.redhat.com/~jvdias/bind/RHEL-4/9.3.2-2_EL4/ safe for production
use? (Will Update 4 include this version?)
In reply to comment #4, From Jordan Russell (firstname.lastname@example.org), on
2006-04-29 14:59 EST:
> I'm also having this problem.
> I tried to get the updated version you mentioned, but the directories under
> http://people.redhat.com/~jvdias/bind/RHEL-4/9.2.4-12_EL4/ are all empty.
> Is http://people.redhat.com/~jvdias/bind/RHEL-4/9.3.2-2_EL4/ safe for production
> use? (Will Update 4 include this version?)
The bind version queued for delivery in RHEL-4-U4 is bind-9.2.4-16.EL4,
which you can download from:
This version has this bug fixed, as well as fixes for all known BIND 9.2.4
bugs backported from 9.2.6, and the 'edns0-udp-size' feature backported
from 9.3.x .
There is also bind-9.3.2-2.EL4, available from:
bind-9.3.2-2.EL4 is not officially supported as a RHEL-4 update release,
as we are not allowed to upgrade packages by major version numbers in RHEL,
but is provided for customers requiring 9.3.2 features, and I as the bind
package maintainer do undertake to fully support it - it is built on our
production build servers for all RHEL-4 architectures and passes all known
Please try out one of the above versions and let me know of any issues -
I hope it resolves your problem .
Thanks & Regards,
Jason Vas Dias,
BIND package maintainer
Red Hat Inc.