Updating IP/machine names to DNS

[Jeff]

We are using Nortel Optivity ID DNS server and our DHCP
and active directory are not deleting entries or sending
the correct updates to delete records that know longer
exist. Then we get multiple IP addresses showing up for
one machine. Is there a command line tool to use to
force deletions of records that don't exist any more? Is
there another reason why this is happening? Our DNS has
not changes for years and this just started happening.
We have up'd our lease time on DHCP which has helped but
has not fixed our problem.

 

[S.J.Haribabu]

Hi Jeff,

Thanks for posting.
With dynamic update, records are automatically added to the zone when
computers and domain controllers are added. However, in some cases, they
are not automatically deleted. For example, if a computer registers its own
A resource record and is improperly disconnected from the network, the A
resource record might not be deleted. If your network has many mobile
users, this can happen frequently.

Having many stale resource records presents a few different problems. Stale
resource records take up space on the server, and a server might use a
stale resource record to answer a query. As a result, DNS server
performance suffers.

To solve these problems, the Windows 2000 DNS server can "scavenge" stale
records; that is, it can search the database for records that have aged and
delete them. Administrators can control aging and scavenging by specifying
the following:

Which servers can scavenge zones
Which zones can be scavenged
Which records must be scavenged if they become stale
The DNS server uses an algorithm that ensures that it does not accidentally
scavenge a record that must remain, provided that you configure all the
parameters correctly. By default, the scavenging feature is off.

Thanks,

(e-mail address removed)

This posting is provided "AS IS" with no warranties, and confers no rights.