Sun Microsystems Netra, Руководство пользователя

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Name Service Administration 7-5
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As a secondary domain server, the Netra server is subordinate to another DNS
server maintained by your ISP or in your network. It periodically compares
its database to the current database on the master name server. When it
detects a difference, it requests a zone transfer (in which the master name
server sends the latest copy of the database to the secondary name server).
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For intranet configurations (configurations without connections to the
Internet), you can configure the Netra server as a root name server. In this
case, the Netra server is responsible for all domain information although it
may delegate domains to other DNS name servers.
How to Set Up Name Services
The three name service options (Local, NIS, and DNS) work independently of
each other.
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Local name service enables you to add or delete hosts and their respective
addresses.
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NIS enables you to add or delete the Netra server as an NIS client.
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DNS requires you to configure two independent pieces: a client and a server.
If you configure the Netra server as a DNS server, it is usually best to also
be a client of this DNS server. (Note that you must configure the DNS server
first and then configure it as a client.)
Configuring the DNS server is a two-step process:
1. Start a name server. Unless you are running a root name server, you must
specify a list of other name servers that will be queried when the local DNS
server cannot resolve a query. The default list of name servers should be
sufficient for all sites connected directly to the Internet. For sites that do not
have direct access (for example, because they are behind a firewall), list
other DNS servers that can be contacted.
2. Once the DNS server is running, add primary and secondary domains as
needed.
When you add a primary domain, you are specifying a domain of hosts for
which this DNS server contains authoritative data. Other DNS servers
contact this server to resolve queries about hosts in this domain. Host