[Softwires] Question about draft-sun-softwire-stateless-4over6-00

[Satoru Matsushima <[e-mail]>]

Hi auhtors,

I have quick question about your draft.

Section 5 says:

>    As described above, a stateless 4over6 initiator needs the sub-domain
>    rule containing subPre6, subPre4 and multiplexing ratio.  Since these
>    parameters are relatively stable, it can be configured in a variety
>    of provisioning methods, including
>    DHCPv6[I-D.cui-softwire-dhcp-over-tunnel], "TR-069", etc.  For
>    customer's IPv6 prefix, it will be delegated just in traditional way,
>    e.g.  DHCPv6, Prefix Delegation, etc.  And there is no impact on
>    current IPv6 addressing model.  The concentrator address can be
>    passed through the same option of ds-lite AFTR address.

However, section 10 says:

>    Stateless 4over6 does not need to inform multiple prefix mapping
>    rules to CPEs directly.  Thus, there is no need to introduce dynamic
>    protocol for distributing and maintaining 4rd rules.  This will turn
>    CPE to be a much simpler/dummier client, which will also
>    significantly reduce the burden of CPE management and trouble
>    shooting.



In terms of distribution mapping rule, what's the difference between 4over6 and 4rd?
It seems both of these could use all options, such as pre-configuration, DHCPv6 and TR-069, etc., I don't see any difference between them. Thought?

BTW, thank you for bring this draft before the interim meeting.;)

cheers,
--satoru