Hi Wen, Maybe, we are working on similar problems. Let me comment on a few things about your proposal.
- I think Routing Header is an interesting method to implement policy routing at gateway. The problem is which router has to support Routing Header. Is it correct that L3 CPE and also ISP's edge router has to support Routing Header in scenario2 ? When you see the deployment status of IPv4 source routing, it is clear that ISP routers won't possibly support Routing Header for security reason or other, it may be possible to make CPE vendors to implement Routing Header support though. - Even if ISP edge routers implement Routing Header support, how do the CPEs know ISP edge routers' IPv6 global-scope address ? If I remember correctly, in the Routing Header if you put a link-local-address, the packet's final destination must be a host on the same link. So, end hosts have to know a global address of L3 CPE and ISP edge routers. As RA and DHCPv6 are delivered by link-local addresses, there is no means to inform a global address of a ISP edge router or a L3 CPE. - At the last e-mail sent to IPv6 ML, you mentioned that Host chooses an address given by an ISP that the host want to connect. IMO, however, your proposal doesn't have any effects on address selection at hosts, but have effects on routing after address selection. After address selection is completed, your mechcanism selects an appropriate next or next-next hop depending on the selected source address. We are now working on the address selection aspects of the similar environment considered here. http://www.nttv6.net/dass/draft-arifumi-ipv6-policy-dist-00.txt http://www.nttv6.net/dass/ Now I'm revising this draft and also writing a problem statement document of default address selection in multi-prefix environment. Best regards. -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
