I have reviewed this document as part of the Operational directorate's ongoing effort to review all IETF documents being processed by the IESG.  These comments were written primarily for the benefit of the operational area directors. Document editors and WG chairs should treat these comments just like any other last call comments.     Summary:  This draft is written very clear and I don’t see any open issues.   It would have been better to add a short description in the introduction to state:   We assume that the MC-LAG doesn’t always distribute traffic based on data labels (i.e. VLANs).   If the MC-LAG implementation distributes traffic based on VLAN (many do), then you won’t have the “MAC flip-flopping” problem stated by the draft.   Cheers,   Linda Dunbar