Hi Tim, I don't know much about RFC3484, but do you mean that the STB in my example can choose the expected prefix/address via the Policy Table? What is in the Policy Table and how to configure it? Manually (maybe not acceptable for SLAAC case) or automatically?
Thanks! Best regards, Fortune -----Original Message----- From: Tim Chown [mailto:t...@ecs.soton.ac.uk] Sent: Tuesday, June 08, 2010 4:53 PM To: Fortune HUANG Cc: 'JOSHI, SHRINIVAS ASHOK (SHRINIVAS ASHOK)'; ipv6@ietf.org Subject: Re: Question about SLAAC: how the host determines the prefixes allocated from different prefix pools On 8 Jun 2010, at 09:44, Fortune HUANG wrote: > > I don't have any preference to use RA over DHCPv6, but I would be > grateful if you could tell me the guidance to decide whether to deploy > SLAAC or DHCPv6. > Obviously, SLAAC can not work as expected in the scenario in my > example. So this seems be to a restriction to the deployment of SLAAC > at least for the time being (any possibility for the SLAAC/RA to > support multiple prefix pools for different services in the future?). > In principle if each prefix is used with a service that is served from that prefix, then if the device implements RFC3484 address selection your multi-addressed hosts should use the correct source addresses. The device would prefer the longest matching prefix. It's also possible to use policy tables with address selection to influence address selection decisions. Note though that RFC3484 has some open issues that are hopefully to be resolved with an update soon (many implementors have already reflected these updates in their products) but also that at least one major operating system (Mac OSX) as yet has no support for the feature. A method to distribute policy tables (by DHCPv6) is also on the table. Tim= -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
