Re: [Softwires] Unified Softwire CPE: draft-bfmk-softwire-unified-cpe

[Ole Trøan <[e-mail]>]

Qiong,

> from MAP's perspective it doesn't matter if it is a /64 on the WAN or a /56 delegated prefix.
> any prefix can have EA bits.
> [Qiong] In theory, right. But I think it still have several issues here:
> 1) The /64 WAN prefix or a /56 delegated prefix does not have a flag saying "hey, I'm the one with EA bits". Then, how can a CPE choose which prefix to extract the EA bits ? Or do you need another configuration flag to indicate which prefix to embed to EA bits?

from the draft:
   "A MAP node finds its Basic Mapping Rule by doing a longest match
   between the End-user IPv6 prefix and the Rule IPv6 prefix in the
   Mapping Rules table.  The rule is then used for IPv4 prefix, address
   or shared address assignment."

cheers,
Ole