TCP/IP Configuration and Management Manual

Configuration Reference
TCP/IP Configuration and Management Manual—427132-004
A-7
Domain Name Server Files
This record indicates that the server is a primary server for zonename, and data-
file-name contains data for this zone-name.
Primary master also should have a record for the IN-ADDR.ARPA domain of the
format:
primary internet_address.in-addr.arpa data-file-name
For example:
primary 32.128.in-addr.arpa $SYSTEM.ZTCPIP.DNSREV
For an explanation of IN-ADDR.ARPA domain, refer to Domain Data Files, later in this
section.
Secondary Master
The line for a secondary server is similar to the line for a primary master, except that it
lists addresses of other servers (usually primary servers) from which the zone data is
obtained. The format of the line is as follows:
secondary zone-name primary1 [primary2...] [backup-file]
For example:
secondary BigCityU.Edu 128.33.0.11 $SYSTEM.ZTCPIP.DNSBAK
The first field specifies that the server is a secondary master server for the zone stated
in the second field. The network address specifies the domain name server that is
primary for the zone. The secondary server gets its data across the network from the
listed server.
The secondary master also should have a record for the IN-ADDR.ARPA domain of the
format:
secondary internet_address.in-addr.arpa data-file-name
For example:
secondary 32.128.in-addr.arpa $SYSTEM.ZTCPIP.DNSREV
For an explanation of IN-ADDR.ARPA domain, refer to Domain Data Files
, later in this
section.
More than one network address may be listed here (separated by spaces). Each
server is tried in the order listed until it successfully receives the data from a listed
server. If you specify a backup file, data for the zone is dumped into that file as a
backup. There is no default backup file.
Caching-Only Server
A special line is not required to designate that a server is a caching server. Instead, a
caching-only server is revealed by the absence of authority lines, such as secondary or
primary in the boot file.