multiple subnets in DNS

  • Thread starter Thread starter maverick
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maverick

hello, in my primary DC (which is also the primary DNS server), i have
class B addresses for local network. i also have remote users, on very
slow leased line, who are on a class C addresses. i created a test user
from one remote site using its class C address together with a reverse
IP. i can ping the computername fine but would AD also find them?

my second question is, can i create this class C addresses in the same
DNS server which also has class B addresses? i know it allowed me but,
is that it?

appreciate any help.
 
maverick said:
hello, in my primary DC (which is also the primary DNS server), i have
class B addresses for local network. i also have remote users, on very
slow leased line, who are on a class C addresses. i created a test user
from one remote site using its class C address together with a reverse
IP. i can ping the computername fine but would AD also find them?
Click to expand...

What do you mean by "would AD find them"? Find how?

Normally AD finds nothing. You can search AD for what it knows;
AD is a database.

There are several likely misconceptions embedded in your message
above and below so let's try separating them and then maybe your
question will be clarified a bit:

In AD there is no (true) PRIMARY DC only DCs. (There is a
PDC Emulator but in most ways all DCs are equal.)

Classes of address and subnets have little or nothing to do with
DNS (except that they will have different reverse zones IF you
create reverse zones).

DNS is a ROUTABLE protocol so ignoring speed and firewall
filters DNS works just fine across routers and even internetworks
(e.g., the Internet: many people without their own DNS servers
use their ISP's DNS server.)

If you can ping your machines by NAME the likely you DNS
is working correctly (for basic resolution.)

You can run DCDiag (from Support Tools on the server CDRom)
on every DC to determine if DCs and DNS are generally healthy
from an AD perspective.

my second question is, can i create this class C addresses in the same
DNS server which also has class B addresses? i know it allowed me but,
is that it?
Click to expand...

Sure, not just on the same server but even in the same Forward
(ordinary) zone.


You would however create different REVERSE zones for
each net or subnet if you wish to resolve FROM IP back to
name.

DNS doesn't care (itself) what address you give to a machine.
The machines from a single Zone (or Domain) can be spread
out all over the world as long as you can resolve their names
and route traffic to them (by IP).
 
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