Weird DNS Problemes with


T

TOD

Hi,
I have a unexplained DNS probleme on my network.
Here's what happends from any pc's on vlan 10.30.0.0
Windows 2000 IP Configuration

Host Name . . . . . . . . . . . . : D0236
Primary DNS Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : teknor.com

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : teknor.com
Description . . . . . . . . . . . : Compaq NC3120
Fast Ethernet NIC
Physical Address. . . . . . . . . : 00-50-8B-5B-EA-
0F
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 10.30.10.250
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . : 10.30.1.1
DHCP Server . . . . . . . . . . . : 10.1.2.30
DNS Servers . . . . . . . . . . . : 10.1.2.30
Primary WINS Server . . . . . . . : 10.1.2.30
Lease Obtained. . . . . . . . . . : Friday,
February 20, 2004 11:52:09 AM
Lease Expires . . . . . . . . . . : Sunday,
February 29, 2004 5:52:09 AM

******
U:\>ping scrbo101
Unknown host scrbo101.

U:\>ping scrbo101.teknor.com
Unknown host scrbo101.teknor.com.

U:\>ping bb
Pinging bb.teknor.com [10.1.2.7] with 32 bytes o
Reply from 10.1.2.7: bytes=32 time<10ms TTL=254

*******

And here's what happends on a Windows 2000 server in Vlan
10.1.0.0
Windows 2000 IP Configuration

Host Name . . . . . . . . . . . . : SFMBO132
Primary DNS Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter TeknorLan:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : 3Com Ether
(3C905B-TX)
Physical Address. . . . . . . . . : 00-50-04-0
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 10.1.2.2
Subnet Mask . . . . . . . . . . . : 255.255.0.
Default Gateway . . . . . . . . . : 10.1.1.250
DNS Servers . . . . . . . . . . . : 10.1.2.30
Primary WINS Server . . . . . . . : 10.1.2.30

********
D:\Documents and Settings\dussaultj>ping scrbo101
Pinging scrbo101 [10.1.2.10] with 32 bytes of dat
Reply from 10.1.2.10: bytes=32 time<10ms TTL=64

D:\Documents and Settings\dussaultj>ping
scrbo101.teknor.com
Unknown host scrbo101.teknor.com.

D:\Documents and Settings\dussaultj>ping bb
Unknown host bb.

D:\Documents and Settings\dussaultj>ping bb.teknor.com
Pinging bb.teknor.com [10.1.2.7] with 32 bytes of data
Reply from 10.1.2.7: bytes=32 time<10ms TTL=255


It seems that the problems for scrobo101 is inverted with
the problem of bb
The only diffencence I can see betwen the two is the first
one has:
DNS Suffix Search List. . . . . . : teknor.com
I don't know why this one has it but not the other one.

Thanks for all your inputs.
 
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K

Kevin D. Goodknecht [MVP]

In
TOD said:
Hi,
I have a unexplained DNS probleme on my network.
Here's what happends from any pc's on vlan 10.30.0.0
Windows 2000 IP Configuration

Host Name . . . . . . . . . . . . : D0236
Primary DNS Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : teknor.com

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : teknor.com
Description . . . . . . . . . . . : Compaq NC3120
Fast Ethernet NIC
Physical Address. . . . . . . . . : 00-50-8B-5B-EA-
0F
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 10.30.10.250
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . : 10.30.1.1
DHCP Server . . . . . . . . . . . : 10.1.2.30
DNS Servers . . . . . . . . . . . : 10.1.2.30
Primary WINS Server . . . . . . . : 10.1.2.30
Lease Obtained. . . . . . . . . . : Friday,
February 20, 2004 11:52:09 AM
Lease Expires . . . . . . . . . . : Sunday,
February 29, 2004 5:52:09 AM

******
U:\>ping scrbo101
Unknown host scrbo101.

U:\>ping scrbo101.teknor.com
Unknown host scrbo101.teknor.com.

U:\>ping bb
Pinging bb.teknor.com [10.1.2.7] with 32 bytes o
Reply from 10.1.2.7: bytes=32 time<10ms TTL=254

*******

And here's what happends on a Windows 2000 server in Vlan
10.1.0.0
Windows 2000 IP Configuration

Host Name . . . . . . . . . . . . : SFMBO132
Primary DNS Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter TeknorLan:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : 3Com Ether
(3C905B-TX)
Physical Address. . . . . . . . . : 00-50-04-0
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 10.1.2.2
Subnet Mask . . . . . . . . . . . : 255.255.0.
Default Gateway . . . . . . . . . : 10.1.1.250
DNS Servers . . . . . . . . . . . : 10.1.2.30
Primary WINS Server . . . . . . . : 10.1.2.30

********
D:\Documents and Settings\dussaultj>ping scrbo101
Pinging scrbo101 [10.1.2.10] with 32 bytes of dat
Reply from 10.1.2.10: bytes=32 time<10ms TTL=64

D:\Documents and Settings\dussaultj>ping
scrbo101.teknor.com
Unknown host scrbo101.teknor.com.

D:\Documents and Settings\dussaultj>ping bb
Unknown host bb.

D:\Documents and Settings\dussaultj>ping bb.teknor.com
Pinging bb.teknor.com [10.1.2.7] with 32 bytes of data
Reply from 10.1.2.7: bytes=32 time<10ms TTL=255


It seems that the problems for scrobo101 is inverted with
the problem of bb
The only diffencence I can see betwen the two is the first
one has:
DNS Suffix Search List. . . . . . : teknor.com
I don't know why this one has it but not the other one.

Thanks for all your inputs.

Are these machines members of an Active Directory domain?
Neither have primary DNS suffixes and you didn't post the ipconfig's for the
machines you are trying to ping.
SFMBO132 has neither a primary DNS suffix or a Connection specific suffix so
unless DHCP is registering for it, there is not way for it to register its
addresses.
You should have posted the ipconfig for the machines that you are trying
ping.
 
A

Ace Fekay [MVP]

In
Are these machines members of an Active Directory domain?
Neither have primary DNS suffixes and you didn't post the ipconfig's
for the machines you are trying to ping.
SFMBO132 has neither a primary DNS suffix or a Connection specific
suffix so unless DHCP is registering for it, there is not way for it
to register its addresses.
You should have posted the ipconfig for the machines that you are
trying ping.

--
Best regards,
Kevin D4 Dad Goodknecht Sr. [MVP]
Hope This Helps
============================

Hi Kevin,

Seems the second one is not a DHCP client, hence no search suffix.
Apparently DHCP has Option 015 set to teknor.com, which is why the first one
does have the search suffix. I guess if the second one is to be kept static,
then the search suffix would need to be manually populated.

You're right, if an AD client, then assuming the settings are left default,
once the machine has been added to the domain, it would pick up the Primary
DNS Suffix.


--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS IS" with no warranties.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
T

TOD

Hi Kevin and Ace,
The computer Scrbo101 is an HP CD tower running a
proprietary OS on it accessible through a web interface.
It's manually config for
Internet Address 10.1.2.10
Default Router 10.1.1.250
Subnet Mask 255.255.0.0
Domain Name teknor.com
Primary DNS Server 10.1.2.30
Primary Wins server 10.1.2.30

And we have not implemented AD our pdc is NT4
It seems that on the machine sfmbo132 (which is static and
nothing in the configuration has change for months)
doesn't look at the dns server.
ex. If I type www.msn.com it's working
When I type (in IE)an internal server name like YUL00DCI
it opens a web page (yul00dci is enter in the wins server
using lmhost)
But when I type http://bb or http://ups50 which are not in
the wins server but just HOST links in the DNS forward
lookups table it doesn't work.
It's like if sfmbo132 doesn't communicate with the DNS
server (which is swmbo138) and I did more test and all our
servers are on vlan 10.1.2.x and all have the same problem
(and they all use statics ip's).
But, when I type
http://ups50.teknor.com or
http://bb.teknor.com it's working!
 
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A

Ace Fekay [MVP]

In
TOD said:
Hi Kevin and Ace,
The computer Scrbo101 is an HP CD tower running a
proprietary OS on it accessible through a web interface.
It's manually config for
Internet Address 10.1.2.10
Default Router 10.1.1.250
Subnet Mask 255.255.0.0
Domain Name teknor.com
Primary DNS Server 10.1.2.30
Primary Wins server 10.1.2.30

And we have not implemented AD our pdc is NT4
It seems that on the machine sfmbo132 (which is static and
nothing in the configuration has change for months)
doesn't look at the dns server.
ex. If I type www.msn.com it's working
When I type (in IE)an internal server name like YUL00DCI
it opens a web page (yul00dci is enter in the wins server
using lmhost)
But when I type http://bb or http://ups50 which are not in
the wins server but just HOST links in the DNS forward
lookups table it doesn't work.
It's like if sfmbo132 doesn't communicate with the DNS
server (which is swmbo138) and I did more test and all our
servers are on vlan 10.1.2.x and all have the same problem
(and they all use statics ip's).
But, when I type
http://ups50.teknor.com or
http://bb.teknor.com it's working!

When you try to resolve a single name, a DNS lookup would affix the suffix
prior to the query. So if you type in
http://bb
And you suffix is teknor.com
And there's a host record under the teknor.com zone called 'bb', then it
will resolve it.

If no suffix, then it will never query DNS.


--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS IS" with no warranties.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 

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