Differences between current version and predecessor to the previous major change of AAAAvsA6.
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| Newer page: | version 4 | Last edited on Sunday, November 28, 2004 11:43:39 am | by AristotlePagaltzis | |
| Older page: | version 1 | Last edited on Wednesday, July 30, 2003 9:35:09 pm | by PerryLorier | Revert |
@@ -1,11 +1,17 @@
-for
[IPv6] there are two types of address format.
[AAAA]
and [
A6]
.
+For
[IPv6] there are two types of [DNS] ResourceRecord, <tt>
AAAA</tt>
and <tt>
A6</tt>
.
-[
AAAA]
is the simple one,
it works just like an A record in [IPv4], but with more bits.
+<tt>
AAAA</tt>
is the simple one --
it works just like an <tt>
A</tt>
record in [IPv4], but with more bits.
-[
A6]
supports fragments of [IPv6] addresses, so you
can have "
example.com"
has the fragment "
2002:c000:0201"
, "
engineering.example.com" can have
the "
example.com fragment" + "
:0001"
, and "
foo.engineering.example.com" can be
"the engineering prefix" + "
:0000:0000:0000:0001"
. This means that when example.com renumbers, they change one [DNS] record (
example.com)
and "pewf!"
all of their machines have been renumbered.
+<tt>
A6</tt>
supports fragments of [IPv6] addresses. You
can say <tt>
example.com</tt>
has the fragment <tt>
2002:c000:0201</tt>
, <tt>
engineering.example.com</tt> has
"the example.com fragment" + <tt>
:0001</tt>
, and <tt>
foo.engineering.example.com</tt> has
"the engineering prefix" + <tt>
:0000:0000:0000:0001</tt>
. This means that when <tt>
example.com</tt>
renumbers, they change just the
one ResourceRecord for <tt>
example.com</tt>
and
all of their machines have been renumbered.
-Now,
people complain that [
A6]
is too complicated, and prone to problems (what
is the [TTL] on the response if the fragments all have different lifetimes?, whats
the status of it if some of them
(but not all of them) are signed with [DNSSEC]?
What protection is there against DoS?).
+Some
people complain that <tt>
A6</tt>
is too complicated, and prone to problems:
+* What
is the [TTL] on the response if the fragments all have different lifetimes?
+* What's
the status of it if some of the entries
(but not all of them) are signed with [DNSSEC]?
+*
What protection is there against [
DoS]
?
-The [
A6]
people say that it's necessary for networks that regularly change IP address (eg: networks that use a dynamic 6to4 address).
+The <tt>
A6</tt>
people say that it's necessary for networks that regularly change [
IP]
address (eg: networks that use a dynamic 6to4 address).
-[
A6]
in general is the newer standard, and [
AAAA]
is the older standard, however, there doesn't appear to be much momentum for [
A6]
support.
+<tt>
A6</tt>
in general is the newer standard, and <tt>
AAAA</tt>
is the older standard, however, there doesn't yet
appear to be much momentum for <tt>
A6</tt>
support.
+
+-----
+CategoryDns
