TCP/IP Configuration and Management Manual

Configuration Reference
TCP/IP Configuration and Management Manual—427132-004
A-11
Domain Name Server Files
If the primary has a different serial number, new information is loaded from the primary,
and the DNSBAK file is updated.
This domain name server is the secondary server for the reverse-address mapping of
the domain 33.128.IN-ADDR.ARPA. The information required for this server is loaded
from the file $SYSTEM.ZTCPIP.DNREVBAK. The version in the SOA record is
compared with the primary server specified in the address 128.33.0.11. The data is
written to the file $SYSTEM.ZTCPIP.DNREVBAK if the version is older than that
specified by the primary domain name server.
If the secondary server cannot access the primary domain-name server’s database at
boot time (startup time), the information loaded from the file
$SYSTEM.ZTCPIP.DNREVBAK (if it exists) is used. When the secondary server can
contact the primary, it checks to see if the primary has a different serial number (see
the SOA—Start Of Authority on page A-16). If the primary has a different serial
number, new information is loaded from the primary and the DNREVBAK file is
updated.
This domain name server is the primary server for the reverse-address mapping in the
special domain 0.0.127.INADDR.ARPA. The cache for the domain name server is to
be loaded from $SYSTEM.ZTCPIP.DNSCACHE.
Caching-Only Server
In this example of a boot file, a domain name server is set to act as a caching-only
server:
; Boot file for Caching-Only Name Server
;
; type domain source file or host
;
domain kentcomm.com
cache . $SYSTEM.ZTCPIP.DNSCACHE
primary 0.0.127.in-addr.arpa $SYSTEM.ZTCPIP.DNSLOCAL
In this example, the database cache is loaded from $SYSTEM.ZTCPIP.DNSCACHE.
This server is the primary server for reverse-address mapping in the local special
domain 0.0.127.IN-ADDR.ARPA.
Remote Server
To access a remote server, set up the file $SYSTEM.ZTCPIP.RESCONF as specified
earlier in RESCONF File on page 3-36.
Example Data Files
The following paragraphs contain sample domain database files for the domain name
server.