Dns Within Edirectory - Novell NETWARE 6-DOCUMENTATION Manual

DNS within eDirectory

36
Novell DNS/DHCP Management Utility Administration Guide
Novell has integrated DNS into eDirectory by extending the eDirectory
schema and creating new eDirectory objects to represent zones, RRSets, and
DNS name servers. Integrating these new objects into eDirectory simplifies
the administration of DNS, enabling centralized administration and
configuration.
A Zone object is an eDirectory container object that holds RRSet objects,
which are leaf objects. A DNS Server object is a leaf object. For detailed
information about these objects, refer to
on page 22.
By integrating DNS into eDirectory, Novell has shifted away from the
traditional concept of primary or secondary DNS name servers to the concept
of a primary or secondary zone.
In traditional DNS, all configuration changes are made on a single primary
name server. When changes have been made, the secondary name servers
request transfers of the changes from the primary name server. This process is
called a zone transfer. The master-slave approach has several disadvantages,
the most significant being that all changes must be made at the primary server.
Using the primary and secondary zone concept, Novell's approach allows
changes from anywhere in the network through eDirectory, which is not
dependent on one server. Zone data is stored within eDirectory and is
replicated just like any other data in the eDirectory tree.
Novell's DNS supports the traditional primary-secondary DNS name server
approach to moving DNS data in and out of eDirectory. Although all Novell
servers can recognize DNS data after the data is placed in the directory
through eDirectory replication, only one server is required for a zone transfer.
The server assigned to perform this function in a secondary zone is called the
Zone In DNS transfer.
In a secondary zone, the Zone In server is responsible for requesting a zone
transfer of data from the external primary name server. The Zone In server
determines which data has changed for a zone and then makes updates to
eDirectory so that other servers are aware of the changes.
The Designated DNS (DDNS) server is a server identified by the network
administrator to perform certain tasks for a primary zone. The DDNS server
for a primary zone is the only server in that zone that receives DNS updates
from a NetWare 6 DHCP server to perform Dynamic DNS (DDNS) updates.
"New eDirectory Objects for DNS"