Missing AAAA records

I've been experiencing some serious network problems lately. For this I ran
a dcdiag /test:dns on one DC and go the results below. I just dont know what
"Warning: The AAAA record for this DC was not found" warnings on network
adapter actually mean. Could someone here explain?

(For background info. we have one win2003r2 DC on 172.20.1.22 and one
Win2008SP1 DC on 172.20.1.24 which is the tested machine)

Directory Server Diagnosis
Performing initial setup:
Trying to find home server...
Home Server = PSAO104

* Identified AD Forest.
Done gathering initial info.
Doing initial required tests

Testing server: Site\PSAO104

Starting test: Connectivity

......................... PSAO104 passed test Connectivity

Doing primary tests

Testing server: Site\PSAO104
Starting test: DNS

DNS Tests are running and not hung. Please wait a few minutes...
......................... PSAO104 passed test DNS

Running partition tests on : ForestDnsZones
Running partition tests on : DomainDnsZones
Running partition tests on : Schema
Running partition tests on : Configuration
Running partition tests on : sao
Running enterprise tests on : sao.fi

Starting test: DNS

Test results for domain controllers:
DC: PSAO104.sao.fi
Domain: sao.fi
TEST: Basic (Basc)
Warning: The AAAA record for this DC was not found
TEST: Records registration (RReg)
Network Adapter [00000010] BASP Virtual Adapter:

Warning:
Missing AAAA record at DNS server 172.20.1.24:
PSAO104.sao.fi

Warning:
Missing AAAA record at DNS server 172.20.1.24:
gc._msdcs.sao.fi

Warning:
Missing AAAA record at DNS server 172.20.1.22:
PSAO104.sao.fi

Warning:
Missing AAAA record at DNS server 172.20.1.22:
gc._msdcs.sao.fi

Warning: Record Registrations not found in some network
adapters

PSAO104 PASS WARN PASS PASS PASS WARN
n/a
......................... sao.fi passed test DNS

Disable IPV6 if you dont need it
http://www.microsoft.com/technet/net...6/ipv6faq.mspx

Too late for you, I guess, but in case others need this info:
Per http://technet.microsoft.com/en-us/l...5(WS.10).aspx:

So that other member servers and domain controllers in the domain or forest can locate this domain controller as a writeable global catalog server in the forest, the DNS A or AAAA records that point from the server's host name to its IP address or addresses must be registered by the domain controller Locator (DC Locator).

That webpage has a few procedures about fixing it too.