Changing the IP scope

We are slowly but surely running out of IP space (poor decision was made a few years back) and we are slowly migrating to a Class B address.

Right now my PC's IP would be on the class B address (10.5.x.x) while my DNs Servers are on 192.168.5.100 and 101

Routing between the 2 networks is handled by the firewall, so that works like a charm.

This is where I get little lost?

Obviously using a different IP space my DNS server at 192.168.0.100 is not going get updated.

So 2 questions

1) Would it make sense to create another DNS server and forward any requests outside of the 10.5.x.x address space to the 192.168.0.100 server

2) If I don't do #1 what are the ramifications to my workstations?

Thanks

EggHeadCafe - Software Developer Portal of Choice
IE Behaviors To Turn Keywords Into Hyperlinks
http://www.eggheadcafe.com/tutorials...turn-keyw.aspx

Hello Ed,

If you use 10.5.x.x with a subnet mask 255.255.0.0 (65534 clients) and running
out of addresses, i would use a new subnet and setup routing correct and
your DNS servers should be able to support them also.

Personal i ouwld make the subnet smaller, you have a real big broadcast domain,
with a lot of not needed traffic.

Best regards

Meinolf Weber
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> We are slowly but surely running out of IP space (poor decision was
> made a few years back) and we are slowly migrating to a Class B
> address.
>
> Right now my PC's IP would be on the class B address (10.5.x.x) while
> my DNs Servers are on 192.168.5.100 and 101
>
> Routing between the 2 networks is handled by the firewall, so that
> works like a charm.
>
> This is where I get little lost?
>
> Obviously using a different IP space my DNS server at 192.168.0.100
> is not going get updated.
>
> So 2 questions
>
> 1) Would it make sense to create another DNS server and forward any
> requests outside of the 10.5.x.x address space to the 192.168.0.100
> server
>
> 2) If I don't do #1 what are the ramifications to my workstations?
>
> Thanks
>
> EggHeadCafe - Software Developer Portal of Choice
>
> IE Behaviors To Turn Keywords Into Hyperlinks
>
> http://www.eggheadcafe.com/tutorials...7-4265-9693-36
> f0fb5afcc8/ie-behaviors-to-turn-keyw.aspx
>

"Ed Berlot" wrote in message
news:...
> We are slowly but surely running out of IP space (poor decision was made a
> few years back) and we are slowly migrating to a Class B address.
>
> Right now my PC's IP would be on the class B address (10.5.x.x) while my
> DNs Servers are on 192.168.5.100 and 101
>
> Routing between the 2 networks is handled by the firewall, so that works
> like a charm.
>
> This is where I get little lost?
>
> Obviously using a different IP space my DNS server at 192.168.0.100 is
> not going get updated.
>
> So 2 questions
>
> 1) Would it make sense to create another DNS server and forward any
> requests outside of the 10.5.x.x address space to the 192.168.0.100 server
>
> 2) If I don't do #1 what are the ramifications to my workstations?
>
> Thanks
>
> EggHeadCafe - Software Developer Portal of Choice
> IE Behaviors To Turn Keywords Into Hyperlinks
> http://www.eggheadcafe.com/tutorials...turn-keyw.aspx

This is not really a DNS question, rather a networking question.

Nonetheless, you can simply use a /23 (255.255.254.0) which will provided up
to 512 hosts, instead of your current /24 (255.255.255.0) that is currently
providing upto 256 hosts. If you need more hosts, such as up to 1024, you
can change the subnet to a /22 (255.255.252.0), this way you don't have to
change the IP scheme, just the subnet. Everything can keep their current IP,
but you would increase the DHCP scope. You would also change the reverse
zone subnet.

Other than that, if you are already routing between two subnets (because the
DNS servers are somewhere else), no change required.


--
Ace

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Ace Fekay, MCT, MCITP EA, MCTS Windows 2008 & Exchange 2007, MCSE & MCSA
2003/2000, MCSA Messaging 2003
Microsoft Certified Trainer

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