Re: Posted a new copy of CPE Rtr draft

[Fred Baker <fred@cisco.com>]

On Mar 16, 2009, at 5:55 AM, Maglione Roberta wrote:

> could you please explain why stateful DHCPv6 is the recommended  
> method for assigning a global IPv6 address to the  WAN interface?  
> Are you suggesting excluding the possibility to use SLAAC to number  
> WAN interface?

I don't understand him to be *precluding* anything. However, I do  
believe that he is saying that an ISP generally has more to configure  
on a CPE router than the interface address; it will have the  
recommended DNS server, the prefix that the SOHO/Residence will subnet  
internally, if DS-Lite is in use it will have the necessary  
information to configure a tunnel, and so on. He is saying that if  
that is the case, one may as well get the interface address from the  
DHCP server as well.

I think the question before the house is whether the ISPs, such as  
Telecom Italia, agree with that viewpoint. Certainly you can *use*  
SLAAC in your network. Would you rather the specification *recommend*  
SLAAC? If so, do you have a recommendation regarding the other  
matters? Would you prefer that the document simply recommend that CPE  
equipment support both options?

I am not expressing an opinion here; I know of networks in which DHCP  
seems like a better choice and networks in which SLAAC is a perfectly  
reasonable solution. I think it is important that you - and other ISPs  
- state their opinions however.