Cisco LAC/LNS question

[Mohacsi Janos]

Hi,


On Fri, 31 Dec 2010, Frank Bulk - iName.com wrote:

> Thanks, Daniel, this is now coalescing in my mind.  I knew there was
> something special about IPv6 and IPCP, but this example makes it concrete
> for me.
>
> Once I get this working with the Cisco 871W I'm testing with, then I'm off
> to try with the D-Link 615 and 825, as well as a couple of DSL modems I have
> on my counter.


It is worth looking at:
http://labs.ripe.net/Members/mirjam/ipv6-cpe-survey-updated-september-2010
http://labs.ripe.net/Members/marco/content-ipv6-cpe-survey

and the comments also.

Best Regards and hapy new year,
 		Janos Mohacsi



>
> Frank
>
> -----Original Message-----
> From: ipv6-ops-bounces+frnkblk=iname.com at lists.cluenet.de
> [mailto:ipv6-ops-bounces+frnkblk=iname.com at lists.cluenet.de] On Behalf Of
> Daniel Roesen
> Sent: Friday, December 31, 2010 8:12 AM
> To: ipv6-ops at lists.cluenet.de
> Subject: Re: Cisco LAC/LNS question
>
> On Thu, Dec 30, 2010 at 05:25:54PM -0600, Frank Bulk - iName.com wrote:
>> Why in the virtual-template section is there a
>>   peer default ip address dhcp
>> but no
>>   peer default ipv6 address dhcp
>
> Because IETF decided to not include global IP negotiation in IP6CP
> in PPP. IP6CP only negotiates an interface identifiers which are then
> used to create link-local addresses on both ends. Determination of
> the global addresses is then supposed to happen with SLAAC or DHCPv6.
>
>> The only thing I can do is
>>   peer default ipv6 pool <poolname>
>> which uses a local pool on the BRAS.
>
> That's for a local prefix delegation pool. See
> http://www.ipv6-es.com/03/documents/cisco/index3.htm
> 4.1.2
>
>> I would like to use an external DHCP server to hand out the PPP client
>> addresses.  I believe "ipv6 dhcp relay destination <servername>" is only
> for
>> prefix delegation.
>
> Not really, also for global IP.
>
> If you need to assign "known" IPv6 global addresses to PPP clients,
> you need to make them do DHCPv6 for it. One way is to send RAs on the
> PPP session with managed config flag set.
>
> Best regards,
> Daniel
>
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