[SGVLUG] Windows DNS question

Mon Jan 27 08:39:31 PST 2014

Good suggestion Claude,

Unfortunately turning it back on made no difference.  The issue is
'intermittent' which in this case means it's happening on every host until
I fiddle with it then mysteriously gets better.  It sometimes gets beter on
its own in 20 minutes or so even without fiddling.  It may have been
coincidence that it started working in the same time span I was disabling
IPV6.

To disable IPV6 you have to edit the registry.  What I did was "Unbind IPv6
from a specific network adapter".  Mic, was this a valid test?
http://support.microsoft.com/kb/929852

Matt

---------
*Matthew Campbell*
Storage Solution Consultant
Storage Design and Engineering

*Kaiser Permanente*
IMG-Systems Integration
99 S. Oakland
Pasadena, CA 91101

626-564-7228 (office)
8-338-7228 (tie-line)
818-314-9897 (mobile phone)
Green Center 3-North, 031W29
---------
*kp.org/thrive <http://kp.org/thrive>*

On Mon, Jan 27, 2014 at 1:48 AM, Claude Felizardo <cafelizardo at gmail.com>wrote:

> Matthew, just to be sure, have you tried turning IPv6 back on to
> confirm that the problem comes back?  Anything else change?  Reboot?
>
> I generally turn off IPv6 for now as I know some of my older equipment
> and applications do not support it.
>
> I just checked my router, I have IPv6 enabled but looks like I only
> have a four octet IP from my ISP so unless someone can give me a good
> reason to try IPv6 I'll probably just leave things as is and let
> others debug problems.
>
> Claude
>
>
>
> On Mon, Jan 27, 2014 at 1:32 AM, Matthew Campbell <dvdmatt at gmail.com>
> wrote:
> > The DNS server is bind on RHEL 6.4 with CENTOS 6.5 updates.
> >
> > Turning off IPV6 suddenly made the bad times go away.
> >
> > I have been fighting a ghost all weekend and thought I had things fixed a
> > number of times but they came back a couple of hours later.  I'll take
> this
> > as a good sign but won't start celebrating yet.
> >
> > Why did that work and what was going on?  How did you know this was the
> > problem?
> >
> > Was it intuition, prior experience or omniscience?
> >
> > Matt
> >
> >
> > ---------
> > Matthew Campbell
> > Storage Solution Consultant
> > Storage Design and Engineering
> >
> > Kaiser Permanente
> > IMG-Systems Integration
> > 99 S. Oakland
> > Pasadena, CA 91101
> >
> > 626-564-7228 (office)
> > 8-338-7228 (tie-line)
> > 818-314-9897 (mobile phone)
> > Green Center 3-North, 031W29
> > ---------
> > kp.org/thrive
> >
> >
> > On Sun, Jan 26, 2014 at 11:34 PM, Mic Chow <zen at netten.net> wrote:
> >>
> >> Is your network running IPV6; if not then disable it in the Windows box.
> >> What flavor is the DNS server; Microsoft?
> >>
> >> Mic
> >>
> >>
> >> On 01/26/2014 10:50 PM, Matthew Campbell wrote:
> >>
> >> Ok, I'm more than a little frustrated.
> >>
> >> I installed a new DHCP/DNS server Friday.  I washed all my Windows and
> >> can't do a thing with them:
> >>
> >> matt at Nala:201% ipconfig /flushdns
> >> Windows IP Configuration
> >> Successfully flushed the DNS Resolver Cache.
> >>
> >> matt at Nala:202% nslookup aslan
> >> Server:  senge.campbell.littlelionstudios.com
> >> Address:  172.28.1.2
> >> Name:    aslan.campbell.littlelionstudios.com
> >> Address:  172.28.2.100
> >>
> >> matt at Nala:203% ping aslan
> >> Pinging aslan [172.28.2.111] with 32 bytes of data:
> >> Reply from 172.28.2.111: bytes=32 time<1ms TTL=64
> >> Reply from 172.28.2.111: bytes=32 time<1ms TTL=64
> >>
> >> matt at Nala:204%
> >>
> >>
> >> WTF?!?  The IP address changed in the cache between the two calls or
> what?
> >> Of course things are not working.  Any suggestions on how to diagnose?
> >>
> >>
> >> Matt
> >>
> >> P.S.  Here's another example:
> >>
> >> matt at Nala:204% nslookup kiara
> >> Server:  senge.campbell.littlelionstudios.com
> >> Address:  172.28.1.2
> >>
> >> Name:    kiara.campbell.littlelionstudios.com
> >> Address:  172.28.2.102
> >>
> >> matt at Nala:205% ssh kiara
> >> ssh: Could not resolve hostname kiara: hostname nor servname provided,
> or
> >> not known
> >>
> >> matt at Nala:206%
> >>
> >>
> >> And here's the ipconfig:
> >>
> >> matt at Nala:206% ipconfig /all
> >> Windows IP Configuration
> >>    Host Name . . . . . . . . . . . . : Nala
> >>    Primary Dns Suffix  . . . . . . . :
> >>    Node Type . . . . . . . . . . . . : Hybrid
> >>    IP Routing Enabled. . . . . . . . : No
> >>    WINS Proxy Enabled. . . . . . . . : No
> >>    DNS Suffix Search List. . . . . . : campbell.littlelionstudios.com
> >> littlelionstudios.com
> >>
> >> Ethernet adapter Ethernet:
> >>    Connection-specific DNS Suffix  . : campbell.littlelionstudios.com
> >>    Description . . . . . . . . . . . : Broadcom NetLink (TM) Gigabit
> >> Ethernet
> >>    Physical Address. . . . . . . . . : BC-5F-F4-4B-96-76
> >>    DHCP Enabled. . . . . . . . . . . : Yes
> >>    Autoconfiguration Enabled . . . . : Yes
> >>    Link-local IPv6 Address . . . . . :
> >> fe80::6c04:e86b:ac8e:4d78%12(Preferred)
> >>    IPv4 Address. . . . . . . . . . . : 172.28.2.122(Preferred)
> >>    Subnet Mask . . . . . . . . . . . : 255.255.0.0
> >>    Lease Obtained. . . . . . . . . . : Sunday, January 26, 2014 10:43:04
> >> PM
> >>    Lease Expires . . . . . . . . . . : Monday, January 27, 2014 10:43:03
> >> PM
> >>    Default Gateway . . . . . . . . . : 172.28.0.1
> >>    DHCP Server . . . . . . . . . . . : 172.28.1.2
> >>    DHCPv6 IAID . . . . . . . . . . . : 264003572
> >>    DHCPv6 Client DUID. . . . . . . . :
> >> 00-01-00-01-18-96-BE-84-BC-5F-F4-4B-96-76
> >>    DNS Servers . . . . . . . . . . . : 172.28.1.2
> >>                                        172.25.0.1
> >>                                        8.8.8.8
> >>    Primary WINS Server . . . . . . . : 172.28.1.2
> >>    NetBIOS over Tcpip. . . . . . . . : Enabled
> >>
> >> Tunnel adapter isatap.campbell.littlelionstudios.com:
> >>    Media State . . . . . . . . . . . : Media disconnected
> >>    Connection-specific DNS Suffix  . : campbell.littlelionstudios.com
> >>    Description . . . . . . . . . . . : Microsoft ISATAP Adapter
> >>    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
> >>    DHCP Enabled. . . . . . . . . . . : No
> >>    Autoconfiguration Enabled . . . . : Yes
> >>
> >> Tunnel adapter Local Area Connection* 11:
> >>    Connection-specific DNS Suffix  . :
> >>    Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
> >>    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
> >>    DHCP Enabled. . . . . . . . . . . : No
> >>    Autoconfiguration Enabled . . . . : Yes
> >>    IPv6 Address. . . . . . . . . . . :
> >> 2001:0:9d38:6ab8:cb6:220c:53e3:fd85(Preferred)
> >>    Link-local IPv6 Address . . . . . :
> >> fe80::cb6:220c:53e3:fd85%14(Preferred)
> >>    Default Gateway . . . . . . . . . : ::
> >>    NetBIOS over Tcpip. . . . . . . . : Disabled
> >>
> >> matt at Nala:205%
> >>
> >> Thanks for any ideas on how to tackle this.  The Linux upgrade including
> >> rebuilding 2 rack-mount servers from parts, OS installs, VM installs,
> App
> >> installs and configuration took 4 hours.  I lost all day Saturday and
> all
> >> day Sunday to this d*** windows quirk.
> >>
> >> Matt
> >>
> >>
> >
>
>
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