[AusNOG] RFC7217 - "A Method for Generating Semantically Opaque Interface Identifiers with IPv6 Stateless Address Autoconfiguration (SLAAC)."

[Mark ZZZ Smith]

----- Original Message -----
> From: Alastair Johnson <aj at sneep.net>
> To: ausnog at lists.ausnog.net
> Cc: 
> Sent: Sunday, 11 May 2014 6:06 AM
> Subject: Re: [AusNOG] RFC7217 - "A Method for Generating Semantically Opaque Interface Identifiers with IPv6 Stateless Address	Autoconfiguration (SLAAC)."
> 
> On 5/5/2014 8:12 PM, Mark Newton wrote:
> 
>> 
>>  On May 6, 2014, at 12:16 PM, Michael Biber <mbiber at ipv6forum.com.au>
>>  wrote:
>> 
>>>  Thank you Mark. Whenever I do training, workshops or consulting
>>>  discussions, I conduct a straw poll to see if people do or intend
>>>  to use SLAAC. The answer is invariably no, with DHCPv6 dominating
>>>  and static assignment taking up the rest. This varies by
>>>  role...service provider/end user/DC/content provider.
>> 
>>  Service providers shouldn’t be assigning end-user addresses;  they
>>  should be assigning prefixes.  Then the end user makes the policy
>>  decision about whether to use SLAAC or not for their hosts.
> 
> That implies that an end-user would never attach a host (that only wants 
> an address, and quite possibly via SLAAC only) directly to the SP 
> service. This, in some topologies, is not the case.
> 
> I've watched some ISPs go to quite extensive lengths to make this 
> topology work - supporting SLAAC and DHCPv6 on end-user facing 
> interfaces so that you can still connect a host directly to the service.

Actually, that is the Internode deployment model, of which Mark would be one of the people behind, and I certainly strongly agree with for this exact reason. (SLAAC for the CPE or a directly attached host, DHCPv6-PD for networks downstream of the CPE).

I think Mark was probably more pointing out that in the SP etc. area it should be about handing out many prefixes to customers to use, not individual addresses. This is a significant mentality change from IPv4, and one that some people seem to be struggling to accept because their IPv4 address scarcity mentality is so ingrained.

Regards,
Mark.





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