> I have a concern about that specified rule of "bits 64 to 71" doesn't protect > the semantics > of the u/g bit. In the case of adopting WKP, the U-bits should be 1, since > WKP is only > concatenated with global IPv4 address to guarantee the uniqueness of > IPv4-Converted > IPv6 addresses. Following statement is quoted from > draft-ietf-bahave-address-format-03. > > "When using a /96 prefix, the administrators MUST ensure that the bits 64 to > 71 are set to zero." > > If this rule is applied to WKP case, it might even break the semantics of the > u/g bit.
No. The "uniqueness" property is defined as "guaranteed to not collide with an IEEE802 identifier." IPv4 addresses do not have that property. Besides, the WKP prefix (64:FF9B::/96) falls in the ::/8 range reserved for the IETF, the only range in which the U/G requirements do not apply. -- Christian Huitema -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
