Hi Remi,

Please see inline.

>> 7. in example a in section 6, how come a mapping rule responding to 2
>> cpe ipv6 prefix length? cpe will get confused when it did forwarding.
>
> CPE prefix lengths may be different. (It is the Domain prefix length that is 
> given in the rule.)
> This is key to be able to assign port sets of different sizes (including 64K) 
> to different customers (at least when the CPE-cascade option isn't necessary).

Yes. But my concern was, for example, a CPE has the below mapping
rule, cited from the draft:
   +--------------------+--------------------+-------------------------+
   | Domain IPv4 prefix | Domain IPv6 prefix | AFTR IPv6 subnet (e.g.) |
   +--------------------+--------------------+-------------------------+
   |     192.32../12    |    2001:db0::/28   | 2001:db0:aaaa:aaaa::/64 |
   +--------------------+--------------------+-------------------------+

when the CPE forwards a IPv4 packet whose destincation address is
within 192.32../12, how the CPE know it will use /48 CE prefix or /52
CE prefix? Or the mapping rule implies the CPE should use the same CE
preifx length as its own delegated prefix?

THanks,
washam
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