DNS and IPv6 - Page 2

gjb911169 · ‎02-05-2009

Good afternoon,

I have a Windows 2003 server running Active Directory and maintains my DNS records. This is sitting on the 2001:db8:0:1::/64 segment. I have devices that are on my 2 and 3 segments respectively. I have entered the devices into my DNS using AAAA records. If a machine is sitting on either the 2 or 3 segments, they cannot ping by name. I have Cisco 1812 series routers running RIPng. I have enabled the following commands in my router config:

ip domain-name

ip name-address

If need be I can post the configuration files. This is a test network.

Any assistance would be appreciated.

Thanks,

Greg

gjb911169 · ‎03-04-2009

I can create the records and I have not found any documentation that it does not work. I am going to keep hacking away untill I figure it out. By the way, I tried to set the DNS address on a linux box and it did not work. I think it may be a config issue. I will try and post the config before I leave for the day.

Thanks again

Greg

gjb911169 · ‎03-05-2009

Here are the router configurations. One is Router 1 which goes between the first 2 segments and where DNS works. The second one is for Router 2 which goes between 2 and 3 and DNS does not work. The first router is dual stacked while the second is not. I suspect this is the issue.

Thanks

Greg

vgrigaliunas · ‎03-05-2009

You may as well not bother with your Windows XP clients. There is a thread currently going on on the DHCP mailing list regarding the host-id with DHCPv6. A clip from one of the mailings - "Right now, only Windows Vista/7 and Linux even support DHCPv6 at all.

Neither Mac OS 10 nor XP support it."

gjb911169 · ‎03-05-2009

I am less worried about the XP clients and just trying to ensure DNS works using the DHCPv6 stateless autoconfig options. I have linux boxes that are not receiving the information. I just want to ensure the configurations are correct and then I can move from there. I can also post my topology diagram again to show what this test network looks like.

Greg

vgrigaliunas · ‎03-05-2009

I assume the Linux boxes can ping6 your DNS server. I would suggest you make sure the Linux boxes are sending DNS queries via IPv6, that these queries are making it to your DNS server, that your DNS server is responding to these queries, and that the responses are making it back to the Linux boxes. Then I would move on to the DHCPv6 options and why they aren't working with the Linux boxes.

vgrigaliunas · ‎03-05-2009

Actually, I stand corrected. Microsoft doesn't support DHCPv6 with XP, but there is an open source, 3rd party implementation called Dibbler :

http://internecine.eu/software/dibbler_dhcpv6.html

vgrigaliunas · ‎03-05-2009

The Windows XP systems will use IPv4 to do DNS queries for IPv6 AAAA records, since they don't support DNS queries over IPv6. Although your Linux systems should work behind router 2.

gjb911169 · ‎03-05-2009

That is the rub. I am not sure why the queries are not reaching the DNS server. I am posting the topology now so you can see what it looks like. It is a very basic setup. I am not seeing anything in the Router Advertisements that show the O bit is set and the DNS server IP as being sent to a client.

Thanks again.

Greg

vgrigaliunas · ‎03-05-2009

Yep...pretty straight forward setup. On the dual-stack subnets, are you sure the Linux boxes are getting the DNS server IP address via DHCPv6 ? How are they getting their IPv4 addresses...via DHCPv4 with options for the DNS server IPv4 address ? Or are the IP configs manually set ?

d_ferraro · ‎09-10-2009

Has this been resolved? I am running into similar issues.