Novell LINUX ENTERPRISE SERVER 10 SP2 - INSTALLATION AND ADMINISTRATION Installation Manual page 653

Line 9:
The IN NS specifies the name server responsible for this domain. gateway is
extended to gateway.world.cosmos because it does not end with a .. There
can be several lines like this—one for the primary and one for each secondary name
server. If notify is not set to no in /etc/named.conf, all the name servers
listed here are informed of the changes made to the zone data.
Line 10:
The MX record specifies the mail server that accepts, processes, and forwards e-
mails for the domain world.cosmos. In this example, this is the host
sun.world.cosmos. The number in front of the hostname is the preference
value. If there are multiple MX entries, the mail server with the smallest value is
taken first and, if mail delivery to this server fails, an attempt is made with the next
higher value.
Lines 12–17:
These are the actual address records where one or more IP addresses are assigned
to hostnames. The names are listed here without a . because they do not include
their domain, so world.cosmos is added to all of them. Two IP addresses are
assigned to the host gateway, because it has two network cards. Wherever the
host address is a traditional one (IPv4), the record is marked with AAAA. If the ad-
dress is an IPv6 address, the entry is marked with AAAA 0. The previous token
for IPv6 addresses was only AAAA, which is now obsolete.
NOTE: IPv6 Syntax
A IPv6 record has a slightly different syntax than IPv4. Because of the
fragmentation possibility, it is necessary to provide information about
missed bits before the address. You must provide this information even if
you want to use a completely unfragmented address. For the IPv4 record
with the syntax
pluto IN
pluto IN
You need to add information about missing bits in IPv6 format. Because
the example above is complete (does not miss any bits), the IPv6 format
of this record is:
AAAA 2345:00C1:CA11:0001:1234:5678:9ABC:DEF0
AAAA 2345:00D2:DA11:0001:1234:5678:9ABC:DEF0
The Domain Name System 635