Re: [Softwires] are multiple Domain IPv6 prefixes possible?

[Rémi Després <[e-mail]>]

Le 16 août 2011 à 16:06, Washam Fan a écrit :

> Hi,
> 
> 2011/8/16 Rémi Després <[e-mail]>:
>> Hi Tetsuya-san,
>> 
>> I agree, of course, on the need to support several mapping rules.
> 
> Is there anywhere in the draft to mention how to deliver these rules?

You can look at draft-mrugalski-dhc-dhcpv6-4rd-00.
Some update will be necessary, AFAIK, but this gives an idea of what can be done once parameters are agreed on.
 
> As my understanding, the provisions described in section 4 only can
> generate a mapping rule, how about deliver multiple mapping rules.
> 
>> But IMHO one point needs clarification (see below).
>> 
>> 
>> Le 16 août 2011 à 02:03, Tetsuya Murakami a écrit :
>> 
>>> Hi Washam,
>>> 
>>> We can allow to use multiple mapping rules in a 4rd domain.
>> ...
>>> When delegating an IPv6 prefix from the network, the corresponding mapping rule whose domain ipv6 prefix has the longest match with the delegated ipv6 prefix, can be selected.
>> 
>> As already discussed privately, I don't know realistic cases where two rules would have IPv6 or IPv4 overlapping prefixes.
>> Consequently, it seems that "longest" match, while being permitted, doesn't need to be a requirement.
> 
> Have the same feeling, ipv4 prefixes/addresses/port-set don't overlap,
> per my understanding.

Thanks,
RD