Jinmei, Sorry, I don't consider your example as valid because there is at least one step in your example's sequence of events that is invalid. That step is mentioned below in quotes
"- Y sends an NS to P::X without link-layer source address option, with the source address being P::Y." According to RFC 4861, a mcast NS MUST include the src link-layer option. So if the NS in your example was a mcast NS with no source link-layer option, then the NS is invalid. Further, if your NS is a unicast NS which is a NUD message, then the L2 link-layer address of Y is available to X when X receives the unicast NUD message. Hemant -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
