Erik Nordmark writes:
 > For the IETF I think this means that we should not issue a proposed standard
 > (e.g. for MIPv6) with a hole (e.g. assuming that ingress filtering will be
 > made  aware of HAO). If we want to go this path I think we need a community
 > supported ingress filtering RFC (BCP or standards track) that handles HAO no
 > later than when MIPv6 becomes Proposed Standard.

   I agree 100% with Erik here, and add this:
   security needs to be thought of in terms of
   layers. Ingress filtering is a useful, but
   incomplete layer. Ultimately hosts need a means
   to defend themselves too since we can't assume
   that anything will have complete coverage.

                 Mike
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