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 document proposes the addition of MPLS flow labels, to enable multiplexing of a single pseudowire (PW) over multiple paths, while retaining the packet order within each IP flow. The document's security considerations simply reference several former MPLS documents. I believe this is appropriate in this case. Nits: although very readable, the document needs another round of proofreading. The following is from the abstract and the first sentence of the Introduction (!): - Abstract: "most forwarding engines": the sentence is unclear - hash what? Also a dangling "END" at the end of the abstract. - Intro first sentence: exit -> exist, equipments -> equipment/devices. Thanks, Yaron