We recently configured a Windows 2008 R2 server to handle DHCP and DNS.    The forward and reverse DNS zones do not seem to be synchronized when the DHCP hands out IP addresses.   Synchronization eventually occurs.

Question:  what determines amount of time delay before a DHCP address is dynamically sent to the DNS server?
Question:  how can I initiate a manual sync?

Note: Active Directory is NOT being used.   Both DHCP and DNS are on the same Windows 2008 R2 machine.
Lance McGrewRETIREDAsked:
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Randy DownsOWNERCommented:
What are you trying to synchronize? DHCP hands out ip & configuration information.  If you have a machine that you need to connect to on your network you would be best server by using a static ip.
Tony GiangrecoCommented:
If you setup DNS on the server, there is nothing to sync. That's the only place it resides. Your PC's should point to the server for DNS and that's it.

Same with DHCP. Only the server should be providing IP addresses. If a router or other device also provides DHCP, that device should have the DHCP server option disabled.

It sounds like you are in a Peer to peer network. You would probably be better off in a Domain, but that's only my opinion. there are many features and security options you don't have access to when in a Peer to Peer environment.

Hope this helps!
Larry Struckmeyer MVPCommented:
Can you provide a screen shot or explanation of the condition or symptom caused by this?
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Lance McGrewRETIREDAuthor Commented:
We have DNS Dynamic updates enabled under the DHCP IPv4 Options however we are not seeing regular updates to the DNS table.

This is the question.
Randy DownsOWNERCommented:
Are experiencing some sort of problem accessing computers on your networK? Is it a domain?

Maybe this will help understanding Dynamic DNS.

Dynamic updates can be sent for any of the following reasons or events:
An IP address is added, removed, or modified in the TCP/IP properties configuration for any one of the installed network connections.

An IP address lease changes or renews with the DHCP server any one of the installed network connections. For example, when the computer is started or if the ipconfig /renew command is used.

The ipconfig /registerdns command is used to manually force a refresh of the client name registration in DNS.

At startup time, when the computer is turned on.

A member server is promoted to a domain controller.
Lance McGrewRETIREDAuthor Commented:
No this is not on a Domain.   Cannot ping host names that receive their IP from DHCP because their host names are not being dynamically updated in the DNS tables.
Randy DownsOWNERCommented:
Do you have clients O/S that don't support a domain?

In order for your server DNS to work properly you need to make sure all other DNS servers (e.g., routers) are disabled. Even the DNS server should point to itself.
Lance McGrewRETIREDAuthor Commented:
DNS server does point to itself both and its own 10.1.x.x IP.   There are no routers in the network.    Only clients OS are Windows 7 and a few Windows XP.
Randy DownsOWNERCommented:
When you do an ipconfig /all on the clients they refer to the server for DNS?

Surely you have a router for a gateway to the Internet. often these routers end up running DHCP as well.
Lance McGrewRETIREDAuthor Commented:
ipconfig /all yields correct IP information from DHCP server.   DHCP is disabled on the Cipa Filter which is the Internet gateway.
Lance McGrewRETIREDAuthor Commented:
A couple issues that I am not clear about are the DNS and zone start of authority.

The Host name of the DHCP/DNS server is WIN2008DHCP
The zone name is scotties.local

Start of Authority I have WIN2008DHCP (not the zone name scotties.local)  is this correct ?

I also have WIN2008DHCP and scotties.local configured as Name Servers (NS)

I have a Host (A) record WIN2008DHCP with its address
I have a (same as parent folder) Host(A) record for scotties.local pointing to the
Randy DownsOWNERCommented:
On a domain the SOA would be FQDN - server.domain (e.g., WIN2008DHCP.scotties.local). The zone name is typically your domain (e.g., scotties.local).

Is there some reason you didn't want a domain? The server ip ( is static, correct?
Randy DownsOWNERCommented:
This might help. It's the installation but you can review settings, perhaps.

Likewise there are some good points discussed here.

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