I have reviewed this document as part of the security directorate's 


ongoing effort to review all IETF documents being processed by the 


IESG.  These comments were written primarily for the benefit of the 


security area directors. Document editors and WG chairs should treat 


these comments just like any other last call comments.






This draft describes a mechanism for mapping an organization's unicast 


to multicast address in IPv4.






The security considerations section does exist and (as also stated in 


RFC 3180) the dynamic means for constructing multicast addressing using 


this scheme reduces DoS attacks for allocations from outside the 


organization.  Which I agree with.




General comments:

None.

Editorial comments:

None.

Shawn.
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