If a host name is mapped to the IP address leased to a DHCP client and the DHCP server has been configured to supply host names, the DHCP server will inform the client of the name it has been assigned. Alternatively, the DHCP server may be configured so that DHCP clients may supply their own host names and the DHCP server will attempt DNS updates on their behalf.
DNS provides basic name-to-address and address-to-name services for the Internet. Once a DNS update is made, other systems may refer to the DHCP client system by name.
You can enable the DHCP service to update the DNS service with the host names of DHCP clients that supply their own host names. When a system's name is registered with DNS, the system is visible outside its domain. In order for the DNS update feature to work, the DNS server, DHCP server, and DHCP client must all be set up correctly, and the requested name must not be in use by another system in the domain.
The DHCP server's DNS update feature works if all the following are true:
DNS server supports RFC 2136.
DNS software that is BIND-based, whether on the DHCP server system or the DNS server system, must be v8.2.2, patch level 5 or newer.
DNS server is configured to accept dynamic DNS updates from the DHCP server.
DHCP server is configured to make dynamic DNS updates.
DNS support is configured for the DHCP client's network on the DHCP server.
DHCP client is configured to supply a requested host name in its DHCP request message.
Requested host name corresponds to a DHCP-owned address or has no corresponding address.