--On 11. september 2003 14:47 -0400 iesg-secretary@ietf.org wrote:
Any packets between the correspondent node
and the mobile node sent or in-flight during this time arrive at the
old care of address, where they are dropped since the mobile node no
longer has link connectivity with the old subnet.
I believe this is more correctly phrased as "If the mobile node no longer
has link connectivity with the old subnet, any packets...."
The obvious, but not always practical, solution to the problem (keeping
both links during handover) is impliclity alluded to later, under "FMIPv6"
(link preconfiguration), but is not mentioned explicitly anywhere.
And of course the obvious common question: Where are the security
requirements going to be developed....?
(HMIPv6 introduces an obvious point for man-in-the-middle attacks, which
may not even have to be on-link, for instance. So it's not security
neutral....)