Woj ,

> the IPv4 and PSID in the IID are particularly useful in cases of address 
> independence (ie 1:1). 

Now that IPv4 and PSID is put in the IPv6 address, why is it a case of address 
independence?


Best Regards,
Qi Sun


On 2013-1-28, at 下午9:51, Wojciech Dec wrote:

> Hi,
> 
> the IPv4 and PSID in the IID are particularly useful in cases of address 
> independence (ie 1:1). As said previously, the benefit is primarily in the 
> ability an operational facilitation, where an operator can easily see/observe 
> what IPv4 and PSID is being used by a given customer. This is easier than to 
> look at the v6 prefix and use some magic decoder ring.
> In addition, it has the desirable characteristic of creating an IID.
> 
> +1 Thus to keeping the IPv4 and PSID, likely in a fixed length (16 bit) field 
> format.
> 
> Regards,
> Woj.
> 
> On 24 January 2013 16:27, Ole Troan <[email protected]> wrote:
> hi,
> 
> can we please keep discussion on the list. not via the issue tracker?
> 
> does anyone else have an opinion?
> (if I don't hear anything from anyone else, I'll default to keep current 
> text.)
> 
> cheers,
> Ole
> 
> On Jan 24, 2013, at 17:23 , softwire issue tracker 
> <[email protected]> wrote:
> 
> > #19: IPv4 address superfluous in MAP-E Interface IDs
> >
> > Changes (by [email protected]):
> >
> > * priority:  trivial => major
> > * status:  closed => reopened
> > * resolution:  wontfix =>
> >
> >
> > Comment:
> >
> > Value of having the PSID in MAP-E IIDs for maintenance isn't clear at all:
> > - PSID length isn't determined in IIDs (there can be an unknown number of
> > trailing zeroes)
> > - all PSID bits are already readable in the first 64 bits
> >
> > Suggestion to close the issue:
> > - keep IPv4 addresses in IIDs (they contains some bits that aren't in the
> > first 64 bits)
> > - don't keep the PSID in IIDs (insufficiently justified complexity)
> >
> > --
> > -------------------------+-------------------------------------------------
> > Reporter:               |       Owner:  draft-ietf-softwire-
> >  [email protected]   |  [email protected]
> >     Type:  defect       |      Status:  reopened
> > Priority:  major        |   Milestone:
> > Component:  map-e        |     Version:
> > Severity:  Candidate    |  Resolution:
> >  WG Document            |
> > Keywords:               |
> > -------------------------+-------------------------------------------------
> >
> > Ticket URL: 
> > <http://trac.tools.ietf.org/wg/softwire/trac/ticket/19#comment:4>
> > softwire <http://tools.ietf.org/softwire/>
> >
> 
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