Dhcp updating dns records
Windows 2000 DHCP clients are dynamic update–aware and can initiate the dynamic update process.A DHCP client negotiates the process of dynamic update with the DHCP server when the client leases an IP address or renews the lease, determining which computer will update the A and PTR resource records of the client for the FQDN (which can contain a connection-specific DNS suffix).Depending on the negotiation process, the DHCP client, the DHCP server, or both, update the records by sending a dynamic update request to a primary DNS server that is authoritative for the name that is to be updated.Clients and servers that are running versions of Windows earlier than Windows 2000 do not support dynamic update.
If you configure the client not to automatically register name–to–IP address mappings and the DHCP server is running Windows 2000, and it is configured to register DNS resource records on behalf on clients that are running versions of Windows earlier than Windows 2000, the DHCP server attempts to update the mappings instead.
This section describes the Windows 2000 implementation of dynamic update.
For information about the dynamic update standard specified in RFC 2136, see "Introduction to DNS" in this book.
To negotiate the dynamic update process, the DHCP client sends its FQDN to the DHCP server in the DHCPREQUEST packet by using the FQDN option.
The server then replies to the DHCP client by sending a DHCP acknowledgment (DHCPACK) message by using the FQDN option.