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Documentation for rrset-order here: http://www.zytrax.com/books/dns/ch7/queries.html
Wiki Markup rrset-order
rrset-order
{
order_spec
;
[
order_spec
;
...
]
rrset-orderdefines
the
order
in
which
multiple
records
of
the
same
type
are
returned.
This
works
for
any
record
type
in
which
the
records
are
similar
not
just
A
or
AAAA
RRs
and
covers
results
in
the
ANSWER
SECTION
and
the
ADDITIONAL
SECTION.
The
default
is
cyclic
(round-robin).
The
full
specification
of
rrset-order
is
shown
below.
An
'order_spec'
is
defined
as:
class
class_name
][
type
type_name
][
name
"domain_name"]
order
ordering;
Where'class_name'
is
the
record
class,
for
example,
IN
(default
is
'any'),
type
is
the
Resource
Record
type
(if
none
specified
defaults
to
'any'),
domain_name
limits
the
statement
to
a
specific
domain
suffix
and
defaults
to
root
(all
domains),
order
is
a
key
word
and
ordering
may
take
one
of
the
following
values:
fixed
-
records
are
returned
in
the
order
they
are
defined
in
the
zone
file
random-
records
are
returned
in
a
random
order
cyclic-
records
are
returned
in
a
round-robin
fashion
Note:For
reasons
best
known
to
the
ISC
(BIND's
author)
the
fixed
value
is
now
(BIND
9.6+)
only
available
if
the
configure
option
--with-fixed-rrset
is
used
in
the
build.
Neither
BSD
nor
Debian
standard
packages
use
this
option.
This
is
likely
to
be
true
for
Fedora
and
other
RPMs
but
has
not
been
verified
(use
named
-V
to
check).
For
practical
purposes
only
cyclic
and
random
are
the
available
choices.
Examples
Defines
that
all
equal
records
for
all
domains
will
be
returned
in
random
order.
Code Block rrset-order {order random;};Defines
that
all
equal
MX
records
for
example.com
will
be
returned
in
random
order
all
others
in
cyclic
order.
Code Block rrset-order {type MX name "example.com" order random; order cyclic};This
statement
may
be
used
in
a
view
or
a
global
options
clause.
Advanced DNS configuration
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