[Softwires] sharing restricted addresses by hosts in 4rd (draft-despres-intarea-4rd-01)

[Dmitry Anipko <[e-mail]>]

Hi,

Since re-chartering to include 4rd has not been approved yet (as far as I know), I'm not sure if softwires is the right forum for this question, please let me know if intarea is a better one for the time being.

Draft-despres-intarea-4rd-01 allows for configuration of end hosts (since it defines CE as "a host, a router or both") with shared addresses with restricted port sets. My understanding is that usage by applications of such addresses, assigned to interfaces, may have issues - for example, those are discussed in http://tools.ietf.org/html/draft-dec-stateless-4v6-00 . 

Should the draft include a recommendation to either avoid assigning such addresses to interfaces, and use it only in the NAT function, even when CE is a host, or, as draft-dec-stateless-4v6-00 suggests in section 3.1.2, modify the 4rd DHCP option to provide for CE ability to specify whether it is capable to function with a shared address? (since 4rd can also distribute not shared addresses / address ranges)

Thank you,
Dmitry