Re: [Softwires] [Softwire] draft-ietf-softwire-map-00 does NOT reflect the consensus from the WG

Satoru - Let's think that a CE provisioned with following BMR comes from MAP DHCPv6 options.
BMR:
 o Rule-ipv6-prefix  : {exact matched with CE's delegated prefix}  
 o Rule-ipv4-prefix  : x.x.x.x/32
 o EA-length         : 0
 o Port-param option : {PSID/length}
This BMR could be a LW46 provisioning means.

If the intention is only for the independence provision of IPv4 address assignment and IPv6 prefix delegation, I guess we could also think the alternative scenario that CE provisioned with following BMR comes from MAP DHCPv6 options.

BMR:
 o Rule-ipv6-prefix  : the length of Rule-ipv6-prefix + PSID length = the length of CE's IPv6 delegated prefix
 o Rule-ipv4-prefix  : x.x.x.x/32
 o EA-length       : PSID length

That means PSID still be embedded in the CE's IPv6 delegated prefix.

Best Regards,
Leaf

-----Original Message-----
From: softwires-bounces@ietf.org [mailto:softwires-bounces@ietf.org] On Behalf Of Satoru Matsushima
Sent: Monday, June 25, 2012 5:05 PM
To: Peng Wu
Cc: softwires@ietf.org; Yong Cui
Subject: Re: [Softwires] [Softwire] draft-ietf-softwire-map-00 does NOT reflect the consensus from the WG

Hi Peng,

On 2012/06/25, at 17:50, Peng Wu wrote:

>> Hmm, I've read 'draft-cui-softwire-b4-translated-ds-lite' as you called 'lightweight 4over6'. LW46 for short, it looks me that MAP just provides LW46 a provisioning means which would be described in the section 5, or appendix section because following text described in section 5:
>> 
>> "Other optional alternatives to retrieve the public address and port-
>>  set also exist.  The specific protocol extensions are out of scope in
>>  this document, however some alternatives are mentioned in the Appendix
>>  section."
> Let me take a step further following your direction:
> You are saying MAP is a provisioning mean in lw4over6. Then, what exactly?
> With IPv4-IPv6 addressing independency, you proivde an IPv4 address
> and port set, within another DHCPv6 option?
> No BMR, No FMR, No embedding address. Look at what's left. how is this
> even similar to MAP?

Let's think that a CE provisioned with following BMR comes from MAP DHCPv6 options.

BMR:
 o Rule-ipv6-prefix  : {exact matched with CE's delegated prefix}
 o Rule-ipv4-prefix  : x.x.x.x/32
 o EA-length         : 0
 o Port-param option : {PSID/length}

This BMR could be a LW46 provisioning means.

cheers,
--satoru
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