[c-nsp] IPV6 again

Michael Robson Michael.Robson at manchester.ac.uk
Mon Feb 1 11:35:51 EST 2010

On 29 Jan 2010, at 17:07, David Prall wrote:

> So XP doesn't support IPv6 DHCP, nor do they support IPv6 DNS. Not sure
> about the macintosh. 

and I thought I was being clever pointing fec0:0:0:ffff::1, 2 and 3 to real DNSv6 servers and finding the "add dns" from within netsh only to be thwarted by an XP resolver that doesn't support IPV6 properly.

On 29 Jan 2010, at 19:09, Alan Buxey wrote:

> Hi,
>> OK so looking at/listening to various recommendations, when allocating IPV6 addresses, stateless auto-configuration with DHCPv6 used to dish out the DNS servers and domain looks the most appealing. Since the IOS version we are using on our 6500s doesn't support IPV6 DHCP relaying (12.2(18)SXF13) I tried to set up a test using the 6500 itself to serve the DNS and domain information but I cannot get it to work. When I use the following configuration the clients are configured with appropriate v6 IPs and can get out into the IPV6 Internet, but no DNS or domain information is received. Turning on "debug ipv6 DHCP" yields no entries in the log at all for either an iMac or an XP laptop: am I missing some configuration?
> DHCPv6 and stateless configuration are pretty much still very messy right now.
> yes, DHCPv6 would be a direct replacement for clients on the v6 landscape but
> not many clients support it.... 
I'm starting to realise that...

> worse, stateless configuration, whilst in a way elegant, hardly anything gets
> handed over to it....eg DNS or NTP information . theres also no way to hand over
> any encrpytion or seed things eg for SeND - we've been in chats with people
> about getting some nice extensions into the stateless RFC - it'd be good/useful
> to have these things sorted.
RFC 5006 looks promising, although it does seem to only mention DNS servers. 

> ..now...what are those IPv6 youtube addresses, I've got an hour to burn ;-)
> alan



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