ipv6 deployment question

Carl Holzhauer cholzhauer at sscorp.com
Tue Sep 7 12:32:52 UTC 2010

The fact that NAT/PAT is gone with IPv6 is one of the advantages of moving to it…end to end IPv6 connectivity.

DNS registration depends on the OS/DNS server.  Windows and Windows DNS will automagically register hosts in DNS, you only need to set up the reverse zone.

From: dhcp-users-bounces+cholzhauer=sscorp.com at lists.isc.org [mailto:dhcp-users-bounces+cholzhauer=sscorp.com at lists.isc.org] On Behalf Of Eddie Lania
Sent: Monday, September 06, 2010 1:16 PM
To: Users of ISC DHCP
Subject: Re: ipv6 deployment question


I am already working on that scenario.

I use radvd only for router (gateway) advertisement. I set flags in radvd so that no stateless configuration is done on the hosts.
Hosts need to use dhcpv6 for ipv6 configuration. dhcp provides hosts with the unique local addresses.

This prevents hosts to communicate beyond the FC00::/7 to the outside world.

But this setup seems pretty useless since no NAT/PAT is available (yet) in ipv6. Hosts need real global (2000::/3) addresses to accomplish that.

I have a tun6to4 connection to the internet.

I could provide them with addresses by using a /64 subnet from the 2002::/16 subnet that is provided to me through the tun6to4 connection but then I keep breaking my mind about how addresses of these hosts would have to be registered in the local dns.

From what I know, it is not allowed to use the tun6to4 addresses to be registered in global dns.

So, I wonder how this should be done in the real ipv6 world. (I think nat/pat is not valid anymore in ipv6).



This seems to work for the most part.

On Mon, 2010-09-06 at 16:17 +0530, Suprasad Mutalik Desai wrote:

Site local addresses are deprecated and are no more used. Instead we use Unique Local addresses,FC00::/7 (ULA) to assign addresses to the LAN side hosts.

Regd the RDNSS option although radvd has support for that but LAN side host doesn't support this option . So actually you cannot use this option for deployment. So As of now , until all the hosts support this RDNSS, better option would be RADVD + Stateless DHCPv6 server


On 9/4/10, Eddie Lania <eddie at lania.nl<mailto:eddie at lania.nl>> wrote:
Okay, thank you again. That seems pretty straight forward :-)

One thing I still wonder about:

Is everybody that uses ipv6 just assigning global addresses to all the hosts in their lan?

Or are there also people that prefer to assign site global addresses to their hosts only?
What would be the benefit of that? You can't "nat" them to the outside world can you?

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/dhcp-users/attachments/20100907/1d89735a/attachment.html>

More information about the dhcp-users mailing list