Configuring and Managing MPE/iX Internet Services (MPE/iX 6.5)

218 AppendixC
BIND 8.1 Enhanced Features
BIND 8 Highlights
Periodic Task
Intervals
cleaning-interval The server will remove expired
resource records from the cache every
cleaning-interval minutes. The
default is 60 minutes. If set to 0, no
periodic cleaning will occur.
interface-interval The server will scan the network
interface list every
interface-interval minutes. The
default is 60 minutes. If set to 0,
interface scanning will only occur when
the configuration file is loaded. After
the scan, listeners will be started on
any new interfaces (provided they are
allowed by the listen-on
configuration). Listeners on interfaces
that have gone away will be cleaned up.
statistics-interval Nameserver statistics will be logged
every statistics-interval minutes.
The default is 60. If set to 0, no
statistics will be logged.
Topology All other things being equal, when the server chooses a nameserver to
query from a list of nameservers, it prefers the one that is topologically
closest to itself. The topology statement takes an address_match_list
and interprets it in a special way. Each top-level list element is assigned
a distance. Non-negated elements get a distance based on their position
in the list, where the closer the match is to the start of the list, the
shorter the distance is between it and the server. A negated match will
be assigned the maximum distance from the server. If there is no
match, the address will get a distance which is further than any
non-negated list element, and closer than any negated element. For
example,
topology {
10/8;
!1.2.3/24;
{ 1.2/16; 3/8; };
};
will prefer servers on network 10 the most, followed by hosts on
network 1.2.0.0 (netmask 255.255.0.0) and network 3, with the
exception of hosts on network 1.2.3 (netmask 255.255.255.0), which is
preferred least of all.
The default topology is
topology { localhost; localnets; };