Xu Xiaohu escribió: > >> -----邮件原件----- >> 发件人: behave-boun...@ietf.org [mailto:behave-boun...@ietf.org] 代表 >> marcelo bagnulo braun >> 发送时间: 2009年12月9日 21:24 >> 收件人: Christian Huitema >> 抄送: beh...@ietf.org; Xu Xiaohu; ipv6@ietf.org >> 主题: Re: [BEHAVE] Reason(s) for Modified EUI-64 format to apply to ALL >> non-0::/3 IPv6 addresses ? >> >> Christian Huitema escribió: >> >>>> At least the former usage has some certain applications. For example, >>>> > in > >>>> case of NAT64, if a dual-stack host could distinguish synthesized IPv6 >>>> addresses from native IPv6 addresses, it will not prefer a synthesized >>>> > IPv6 > >>>> address to an IPv4 address for initiating a communication with an IPv4 >>>> > host. > >>> The well known prefix is easy to recognize, so there is no problem >>> > there. > >> For stateless, the design makes sure that the IPv4 translatable addresses >> > can > >> be routed natively, which means there is no reason to not prefer them. >> > That > >> leaves a pretty small domain of applicability for any scheme that would >> > reserve > >> identifier patterns... >> >>> >> In addition, in the NSP case, the host can configure the RFC3484 policy >> table to preffer native connectivity. >> > > However, when one configures such a policy that native IPv6 connectivity > should be preferred to IPv4 connectivity. How could the dual-stack host > distinguish synthesized IPv6 addresses from native IPv6 addresses? If there > are some bits to tell whether it is an IPv4-embeded IPv6 address or not > (even which type of IPv4-embeded IPv6 address), the above issue can be > solved easily. > for the NSP, what the host needs to know is the NSP itself, that is what needs to be included in the policy table
Regards, marcelo > Xiaohu > > >> Regards, marcelo >> >> >> >>> -- Christian Huitema >>> >>> >>> >>> >>> >>> _______________________________________________ >>> Behave mailing list >>> beh...@ietf.org >>> https://www.ietf.org/mailman/listinfo/behave >>> >>> >>> >> _______________________________________________ >> Behave mailing list >> beh...@ietf.org >> https://www.ietf.org/mailman/listinfo/behave >> > > > -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
