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.

Given the short time available for the review, I have only been able to skim the material.

Since this protocol is happening at the link layer, the range of security considerations that are in scope is fairly small. 

While confidentiality of the data plane is not at issue here, the control plane probably contains much information that is commercially sensitive.