Re: dns basics

SP wrote:
> Hi
>
> In dnsmgmt, under Forward Lookup Zones, when I click on mydomain.net,
> I would see a list of Host (A) on the right. This list has 3 columns
> (Name, Type, Data). Name shows many workstation names in the LAN.
> Type shows mainly Host (A) for every workstation, and Data shows the
> IP addresses associated to the workstations.
>
> In several instances, one IP address would be associated with 2 or 3
> workstations. If I go to DOS and ping the names of the 3
> workstations, all 3 would return the same one IP address.
>
> Is this normal ?
Sort of, this usually happens mainly to laptops, but any client that
suddenly disconnects or shuts down without removing its registrations, then
the next time DHCP leases the IP to a different client, the client will
register its record with the IP. This is usually corrected the next time the
previous lease holder registers, but during the overlap you get to see this.
This is more common on PTR records because a PTR registered by one machine
cannot be updated by another.


> If not, how can I resolve this ?

There is a group policy that can be applied to XP clients to replace
conflicting A records.

Computer Configuration
-Administrative Templates
-Network
-DNS Client

If this is a major concern you should disable DHCP on the router then use
DHCP on your server to register all the records for your machines. If
properly set up MS DHCP will register and de-register all DNS registrations
for all machines using DHCP leases.

How to configure DNS dynamic updates in Windows Server 2003:
http://support.microsoft.com/default.aspx?scid=kb;en-us;816592

--
Best regards,
Kevin D. Goodknecht Sr. [MVP]
Hope This Helps
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