Dhcp not updating reverse dns
The Windows 2000 DNS service supports dynamic updates.
For more information, see the chapter "Windows 2000 DNS" in this book A Windows 2000 DHCP server can register with a DNS server and update pointer (PTR) and address (A) resource records on behalf of its DHCP-enabled clients using the DNS dynamic update protocol.
Domain Name System (DNS) servers provide name resolution for network clients.
DNS maintains (among other things) information that links a computer's fully qualified domain name (FQDN) to its assigned IP address(es).
DHCP servers can differentiate between Windows 2000 and other clients.When a DHCP server registers and updates DNS pointer (PTR) and address (A) resource records on behalf of its DHCP-enabled clients, it uses the information contained within an additional DHCP option: the Client FQDN option (option 81), which permits a client to provide its FQDN and any instructions to the DHCP server that is used to process DNS dynamic updates on its behalf.