dns problems with 2 ad domains

[nickc]

Hi

I have 2 active directory domains company A and company B
that were both NT domains and have been upgraded,they
already had explicit trusts setup both directions under
NT that have stayed in place upon upgrade. All Domains
are on same 192.168.1.0 subnet. Company A DC is doing
DHCP and DNS as is Company B DC. The problem I have is if
a member of company A gets its IP from Company B DHCP
server then its primary DNS server is Company B's and it
also get the domain suffix of comapnyB.local when you do
an ipconfig instead of companyA.local, also the same
problem if companyB gets its IP from company A DHCP
server it gets company A dns server as primary.

Company A DNS server has an active directory intergrated
zone for companyA.local and a secondary zone for
companyb.local DHCP gives clients company A dns server as
Primary and B dns server as secondary

Company B DNS server has an active directory zone for
companyb.local and a secondary zone for companya.local.
DHCP gives clients company B dns server as Primary and A
dns server as secondary

Adding an AD intergrated domain for company B on company
A DNS server or visa versa does not work.

How should dns be set up in this situation so it all
works regardless of what DHCP gives out IP.

Any help would be great

Thanks

Nick

 

[Ace Fekay [MVP]]

In

Hi

I have 2 active directory domains company A and company B
that were both NT domains and have been upgraded,they
already had explicit trusts setup both directions under
NT that have stayed in place upon upgrade. All Domains
are on same 192.168.1.0 subnet. Company A DC is doing
DHCP and DNS as is Company B DC. The problem I have is if
a member of company A gets its IP from Company B DHCP
server then its primary DNS server is Company B's and it
also get the domain suffix of comapnyB.local when you do
an ipconfig instead of companyA.local, also the same
problem if companyB gets its IP from company A DHCP
server it gets company A dns server as primary.

Company A DNS server has an active directory intergrated
zone for companyA.local and a secondary zone for
companyb.local DHCP gives clients company A dns server as
Primary and B dns server as secondary

Company B DNS server has an active directory zone for
companyb.local and a secondary zone for companya.local.
DHCP gives clients company B dns server as Primary and A
dns server as secondary

Adding an AD intergrated domain for company B on company
A DNS server or visa versa does not work.

How should dns be set up in this situation so it all
works regardless of what DHCP gives out IP.

Any help would be great

Thanks

Nick

In Win2k, AD Integrated zones are domain specific, and therefore will not
replicate between domains.

Best suggestion is to create a secondary zone on each DNS server of the
other's zone. This way they will be available on both DNS servers.


--
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

 

[Shane Brasher]

Hello Ace,

You are very much correct. AD integrated zones are indeed domain specific.
A secondary zone for each side is the best way to go. Some people elect to
foward to the other domains DNS server. This can work, but a much more
effecient method is to use secondaries.


Shane Brasher
MCSE (2003,2000,NT),MCSA, A+
Microsoft Platforms Support
Windows NT/2000 Networking

 

[Ace Fekay [MVP]]

In

Hello Ace,

You are very much correct. AD integrated zones are indeed domain
specific. A secondary zone for each side is the best way to go. Some
people elect to foward to the other domains DNS server. This can
work, but a much more effecient method is to use secondaries.


Shane Brasher
MCSE (2003,2000,NT),MCSA, A+
Microsoft Platforms Support
Windows NT/2000 Networking

Thanks Shane!
;-)

--
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